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Optimized Squid Proxy Configuration for 4.0.17

Optimized (Optimal) Squid Configuration for Version 4.0.17
Results:All non-dynamic HTTP traffic cached

System Requirements:

Intel Dual Core: 3GHZ

Memory: 16 GB

2 SSD Drives 200 GB Each

Directory Structure:

/ssd

/ssd2

Note: Make sure to edit IP addresses to your environment.

 

#BEGIN CONFIG
#
# Recommended minimum Access Permission configuration:
#
# Only allow cachemgr access from localhost

#no_cache deny noscan
#http_access deny block-googlezip-dcp
#always_direct allow noscan
#no_cache deny video
#always_direct allow video

# Deny requests to certain unsafe ports

# Deny CONNECT to other than secure SSL ports

# We strongly recommend the following be uncommented to protect innocent
# web applications running on the proxy server who think the only
# one who can access services on .localhost. is a local user
#http_access deny to_localhost

#
# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
#
#cache_peer 192.168.1.1 parent 8080 0 default no-query no-digest no-netdb-exchange
#never_direct allow all

# Example rule allowing access from your local networks.
# Adapt localnet in the ACL section to list your (internal) IP networks
# from where browsing should be allowed

http_access allow all

# allow localhost always proxy functionality

# And finally deny all other access to this proxy
# Squid normally listens to port 3128
pipeline_prefetch 99
read_ahead_gap 1024 MB
client_request_buffer_max_size 16384 KB
request_header_max_size 8192 KB
reply_header_max_size 8192 KB
#quick_abort_min -1 KB
#quick_abort_pct 100
#range_offset_limit 32 MB
#refresh_stale_hit 60 seconds
eui_lookup off
http_port 0.0.0.0:8080 intercept disable-pmtu-discovery=always
http_port 0.0.0.0:3128
tcp_outgoing_address 192.168.2.2

client_persistent_connections on
server_persistent_connections on
detect_broken_pconn on

# We recommend you to use at least the following line.
#hierarchy_stoplist cgi-bin ?
# Uncomment and adjust the following to add a disk cache directory.
#cache_dir diskd /ssd/0 54000 32 256 Q1=256 Q2=144
#cache_dir diskd /ssd/1 54000 32 256 Q1=256 Q2=144
#cache_dir diskd /ssd/3 54000 32 256 Q1=256 Q2=144

#cache_dir diskd /ssd2/0 68000 32 256 Q1=256 Q2=144
#cache_dir diskd /ssd2/1 68000 32 256 Q1=256 Q2=144
#cache_dir diskd /ssd2/3 68000 32 256 Q1=256 Q2=144

cache_dir ufs /ssd/0 40000 1024 256
cache_dir ufs /ssd/1 40000 1024 256
cache_dir ufs /ssd/2 40000 1024 256
cache_dir ufs /ssd/3 40000 1024 256
cache_dir ufs /ssd/4 40000 1024 256
cache_dir ufs /ssd/5 40000 1024 256
cache_dir ufs /ssd2/0 40000 1024 256
cache_dir ufs /ssd2/1 40000 1024 256
cache_dir ufs /ssd2/2 40000 1024 256
cache_dir ufs /ssd2/3 40000 1024 256
cache_dir ufs /ssd2/4 40000 1024 256
cache_dir ufs /ssd2/5 40000 1024 256
store_dir_select_algorithm round-robin
#cache_replacement_policy heap LFUDA
#memory_replacement_policy heap GDSF

# Leave coredumps in the first cache dir
coredump_dir /var/cache/squid
# Add any of your own refresh_pattern entries above these.
# General Rules
#cache images

refresh_pattern -i \.(gif|png|ico|jpg|jpeg|jp2|webp)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(jpx|j2k|j2c|fpx|bmp|tif|tiff|bif)$ 100000 90% 20000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(pcd|pict|rif|exif|hdr|bpg|img|jif|jfif|lsr)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(woff|woff2|eps|ttf|otf|svg|svgi|svgz|ps|ps1|acsm|eot)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private

#cache content
refresh_pattern -i \.(swf|js|ejs)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(wav|css|class|dat|zsci|ver|advcs)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private

#cache videos
refresh_pattern -i \.(mpa|m2a|mpe|avi|mov|mpg|mpeg|mpg3|mpg4|mpg5)$ 0 90% 200000 reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(m1s|mp2v|m2v|m2s|m2ts|wmx|rm|rmvb|3pg|3gpp|omg|ogm|asf|war)$ 0 90% 200000 reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(asx|mp2|mp3|mp4|mp5|wmv|flv|mts|f4v|f4|pls|midi|mid)$ 0 90% 200000 reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(htm|html)$ 9440 90% 200000 reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(xml|flow|asp|aspx)$ 0 90% 200000
refresh_pattern -i \.(json)$ 0 90% 200000
refresh_pattern -i (/cgi-bin/|\?) 0 90% 200000

#live video cache rules
refresh_pattern -i \.(m3u8|ts)$ 0 90% 200000

#cache specific sites
refresh_pattern -i ^http:\/\/liveupdate.symantecliveupdate.com.*\(zip)$ 0 0% 0
refresh_pattern -i ^http:\/\/premium.avira-update.com.*\(gz) 0 0% 0
refresh_pattern -i microsoft.com/.*\.(cab|exe|msi|msu|msf|asf|wma|dat|zip)$ 4320 80% 43200
refresh_pattern -i windowsupdate.com/.*\.(cab|exe|msi|msu|msf|asf|wma|wmv)|dat|zip)$ 4320 80% 43200
refresh_pattern -i windows.com/.*\.(cab|exe|msi|msu|msf|asf|wmv|wma|dat|zip)$ 4320 80% 43200
refresh_pattern -i apple.com/.*\.(cab|exe|msi|msu|msf|asf|wmv|wma|dat|zip|dist)$ 0 80% 4320

#cache binaries
refresh_pattern -i \.(app|bin|deb|rpm|drpm|exe|zip|zipx|tar|tgz|tbz2|tlz|iso|arj|cfs|dar|jar)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-no-cache ignore-private
refresh_pattern -i \.(bz|bz2|ipa|ram|rar|uxx|gz|msi|dll|lz|lzma|7z|s7z|Z|z|zz|sz)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(exe|msi)$ 0 90% 200000
refresh_pattern -i \.(cab|psf|vidt|apk|wtex|hz|ova|ovf)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private

#cache microsoft and adobe and other documents
refresh_pattern -i \.(ppt|pptx|doc|docx|docm|docb|dot|pdf|pub|ps)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-no-cache ignore-private
refresh_pattern -i \.(xls|xlsx|xlt|xlm|xlsm|xltm|xlw|csv|txt)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-no-cache ignore-private
#refresh_pattern -i ^ftp: 100000 90% 200000
#refresh_pattern -i ^gopher: 1440 0% 1440

#allow caching of other things based on cache control headers with some exceptions
refresh_pattern -i . 0 90% 200000 reload-into-ims
reload_into_ims on
log_icp_queries off
icp_port 0
htcp_port 0
acl snmppublic snmp_community public
snmp_port 3401
snmp_incoming_address 192.168.2.2
snmp_incoming_address 127.0.0.1
snmp_access allow snmppublic all
minimum_object_size 0 KB
cache_effective_user squid
#header_replace User-Agent Mozilla/5.0 (X11; U;) Gecko/20080221 Firefox/2.0.0.9
#vary_ignore_expire on
cache_swap_low 90
cache_swap_high 95
visible_hostname shadow
unique_hostname shadow-DHS
shutdown_lifetime 0 second
request_entities on
half_closed_clients off
max_filedesc 65535
connect_timeout 5 seconds
connect_retries 2
cache_effective_group squid
buffered_logs on
#access_log stdio:/var/log/squid/access.log squid
access_log daemon:/var/log/squid/access.log
#access_log none
netdb_filename none
client_db off
dns_nameservers 127.0.0.1 192.168.2.2 192.168.1.96 192.168.1.89 192.168.1.92
ipcache_size 4000
ipcache_low 90
ipcache_high 95
dns_v4_first on
negative_ttl 5 minutes
positive_dns_ttl 30 days
negative_dns_ttl 5 minutes
dns_retransmit_interval 2 seconds
check_hostnames off
forwarded_for delete
via off
httpd_suppress_version_string on
# mem and cache size
#collapsed_forwarding on
cache_mem 6 GB
memory_cache_mode disk
maximum_object_size 3 GB
maximum_object_size_in_memory 3 GB
#store_objects_per_bucket 40
digest_generation off
#digest_bits_per_entry 8
pinger_enable off
memory_pools on
max_stale 4 months

#END CONFIG


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Personal, Security

Configuring Logstash and Kibana to receive and Dashboard Sonicwall Logs

Note: If you want to quickly download my Logstash config and Kibana dashboards, see the end of this post.

Locate and Update your Logstash.conf File
First, you must update your logstash configuration file, generally located in /etc/logstash or /etc/logstash/conf.d/ and named logstash.conf

Add a logstash input
In logstash.conf, you must first add an input which will allow logstash to receive the syslog from your Sonicwall appliance along with a designated “listening” port. For my configuration, I set this to port 5515. In my logstash instance, I am using Suricata SELKs, so you can also see a file input for that prior to my Sonicwall input. See below (the text highlighted in RED was the text I added to the config file).

input {
file {
path => [“/var/log/suricata/eve.json”]
#sincedb_path => [“/var/lib/logstash/”]
sincedb_path => [“/var/cache/logstash/sincedbs/since.db”]
codec => json
type => “SELKS”
}
syslog {
type => Sonicwall
port => 5515
}

Insert a logstash Filter
The next step is to insert a new filter for parsing your sonicwall logs, this is so that Logstash knows how to automatically create fields so that you can filter on specific fields in Syslog. Below is the text that I added to the configuration file.  Important: You must make sure that if you have pre-existing filters, your start and end curly braces appropriately open and close and in the filter section the text below incorporated into the filter bracketed text.

if [type] == “Sonicwall” {
kv {
exclude_keys => [ “c”, “id”, “m”, “n”, “pri” ]
}
grok {
match => [ “src”, “%{IP:srcip}:%{DATA:srcinfo}” ]
}
grok {
match => [ “dst”, “%{IP:dstip}:%{DATA:dstinfo}” ]
}
grok {
remove_field => [ “srcinfo”, “dstinfo” ]
}
geoip {
add_tag => [ “geoip” ]
source => “srcip”
database => “/opt/logstash/vendor/geoip/GeoLiteCity.dat”
}

Configure the Parsed Output Location
Finally, you need to configure the output for the config file. The output is to send into the logstash instance. Below is the configuration for this. In this case, my logstash instance is sending to localhost because it is running on the same box.

}

output {
elasticsearch {
host => “127.0.0.1”
protocol => transport
}
}

Configure the Sonicwall
Next you will need to configure your Sonicwall to send syslog messages to the logstash server. Login to your sonicwall, go to “Log->Syslog and then add a server x.x.x.x with port 5515.

Next you’ll need to turn on Sonicwall Name Resolution for Logs
Go to Log->Name Resolution and make sure to setup a DNS server to resolve names. Otherwise, the src and dst fields in the Kibana dashboards will not have names and show double IP address entries.

Finally, you’ll need to configure dashboards in Kibana. To make all of this easier, I’ve included all my files below that can be easily downloaded.

Logstash Configuration *Use Right-Click and Save As*

Kibana Dashboards
(To Import go into Kibana and select “Load” then go to “Advanced and click on “Load File”)

  • Sonic-Alerts (Filters the Top Alert Messages from the Sonicwall Syslog
  • Sonic Top (Filters the Top Source and Destination hosts and events associated with your sonicwall.

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Security

My latest Gartner Research:Competitive Landscape: Distributed Deception Platforms, 2016

4 August 2016  |  Distributed deception platforms are now a viable option for enhancing detection within enterprise security programs. Product marketing managers must understand the competitive positioning of their products and crucial market dynamics in order to compete effectively in the DDP market.

Gartner client’s may access this research by clicking here.


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Personal

Squid Optimized Config 4.0.10

Below is my latest optimized squid configuration.

 

# NOTE You must customize the IP addresses in this configuration to your environment.

#
# Recommended minimum Access Permission configuration:
#
# Only allow cachemgr access from localhost

no_cache deny noscan
http_access deny block-googlezip-dcp
always_direct allow noscan
#no_cache deny video
#always_direct allow video

# Deny requests to certain unsafe ports

# Deny CONNECT to other than secure SSL ports

# We strongly recommend the following be uncommented to protect innocent
# web applications running on the proxy server who think the only
# one who can access services on .localhost. is a local user
#http_access deny to_localhost

#
# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
#
#cache_peer 192.168.1.1 parent 8080 0 default no-query no-digest no-netdb-exchange
#never_direct allow all

# Example rule allowing access from your local networks.
# Adapt localnet in the ACL section to list your (internal) IP networks
# from where browsing should be allowed

http_access allow all

# allow localhost always proxy functionality

# And finally deny all other access to this proxy
# Squid normally listens to port 3128
pipeline_prefetch 99
read_ahead_gap 512 MB
client_request_buffer_max_size 16384 KB
request_header_max_size 8192 KB
reply_header_max_size 8192 KB
quick_abort_min -1 KB
quick_abort_pct 100
#range_offset_limit 32 MB
#refresh_stale_hit 60 seconds
eui_lookup off
http_port 0.0.0.0:8080 intercept
# disable-pmtu-discovery=always
http_port 0.0.0.0:3128
tcp_outgoing_address 192.168.2.2

client_persistent_connections on
server_persistent_connections on
detect_broken_pconn on

# We recommend you to use at least the following line.
#hierarchy_stoplist cgi-bin ?
# Uncomment and adjust the following to add a disk cache directory.
#cache_dir diskd /ssd/0 54000 32 256 Q1=256 Q2=144
#cache_dir diskd /ssd/1 54000 32 256 Q1=256 Q2=144
#cache_dir diskd /ssd/3 54000 32 256 Q1=256 Q2=144

#cache_dir diskd /ssd2/0 68000 32 256 Q1=256 Q2=144
#cache_dir diskd /ssd2/1 68000 32 256 Q1=256 Q2=144
#cache_dir diskd /ssd2/3 68000 32 256 Q1=256 Q2=144

cache_dir aufs /ssd/0 32000 1024 256
cache_dir aufs /ssd/1 32000 1024 256
cache_dir aufs /ssd/2 32000 1024 256
cache_dir aufs /ssd/3 32000 1024 256
cache_dir aufs /ssd/4 32000 1024 256
cache_dir aufs /ssd/5 32000 1024 256
cache_dir aufs /ssd2/0 43000 1024 256
cache_dir aufs /ssd2/1 43000 1024 256
cache_dir aufs /ssd2/2 43000 1024 256
cache_dir aufs /ssd2/3 43000 1024 256
cache_dir aufs /ssd2/4 43000 1024 256
cache_dir aufs /ssd2/5 43000 1024 256
store_dir_select_algorithm round-robin
cache_replacement_policy heap LFUDA
memory_replacement_policy heap GDSF

# Leave coredumps in the first cache dir
coredump_dir /var/cache/squid
# Add any of your own refresh_pattern entries above these.
# General Rules
#cache images

refresh_pattern -i \.(gif|png|ico|jpg|jpeg|jp2|webp)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(jpx|j2k|j2c|fpx|bmp|tif|tiff|bif)$ 100000 90% 20000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(pcd|pict|rif|exif|hdr|bpg|img|jif|jfif|lsr)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(woff|woff2|eps|ttf|otf|svg|svgi|svgz|ps|ps1|acsm|eot)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private

#cache content
refresh_pattern -i \.(swf|js|ejs)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(wav|css|class|dat|zsci|ver|advcs)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private

#cache videos
refresh_pattern -i \.(mpa|m2a|mpe|avi|mov|mpg|mpeg|mpg3|mpg4|mpg5)$ 0 90% 200000 reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(m1s|mp2v|m2v|m2s|m2ts|wmx|rm|rmvb|3pg|3gpp|omg|ogm|asf|war)$ 0 90% 200000 reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(asx|mp2|mp3|mp4|mp5|wmv|flv|mts|f4v|f4|pls|midi|mid)$ 0 90% 200000 reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(htm|html)$ 9440 90% 200000 reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(xml|flow|asp|aspx)$ 0 90% 200000
refresh_pattern -i \.(json)$ 0 90% 200000
refresh_pattern -i (/cgi-bin/|\?) 0 90% 200000

#live video cache rules
refresh_pattern -i \.(m3u8|ts)$ 0 90% 200000

#cache specific sites
refresh_pattern -i ^http:\/\/liveupdate.symantecliveupdate.com.*\(zip)$ 0 0% 0
refresh_pattern -i ^http:\/\/premium.avira-update.com.*\(gz) 0 0% 0
refresh_pattern -i microsoft.com/.*\.(cab|exe|msi|msu|msf|asf|wma|dat|zip)$ 4320 80% 43200
refresh_pattern -i windowsupdate.com/.*\.(cab|exe|msi|msu|msf|asf|wma|wmv)|dat|zip)$ 4320 80% 43200
refresh_pattern -i windows.com/.*\.(cab|exe|msi|msu|msf|asf|wmv|wma|dat|zip)$ 4320 80% 43200
refresh_pattern -i apple.com/.*\.(cab|exe|msi|msu|msf|asf|wmv|wma|dat|zip|dist)$ 0 80% 4320

#cache binaries
refresh_pattern -i \.(app|bin|deb|rpm|drpm|exe|zip|zipx|tar|tgz|tbz2|tlz|iso|arj|cfs|dar|jar)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(bz|bz2|ipa|ram|rar|uxx|gz|msi|dll|lz|lzma|7z|s7z|Z|z|zz|sz)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(exe|msi)$ 0 90% 200000
refresh_pattern -i \.(cab|psf|vidt|apk|wtex|hz|ova|ovf)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private

#cache microsoft and adobe and other documents
refresh_pattern -i \.(ppt|pptx|doc|docx|docm|docb|dot|pdf|pub|ps)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(xls|xlsx|xlt|xlm|xlsm|xltm|xlw|csv|txt)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private
#refresh_pattern -i ^ftp: 100000 90% 200000
#refresh_pattern -i ^gopher: 1440 0% 1440

#allow caching of other things based on cache control headers with some exceptions
refresh_pattern -i . 0 90% 200000 reload-into-ims
reload_into_ims on
log_icp_queries off
icp_port 0
htcp_port 0
acl snmppublic snmp_community public
snmp_port 3401
snmp_incoming_address 192.168.2.2
snmp_access allow snmppublic all
minimum_object_size 0 KB
cache_effective_user squid
#header_replace User-Agent Mozilla/5.0 (X11; U;) Gecko/20080221 Firefox/2.0.0.9
#vary_ignore_expire on
cache_swap_low 90
cache_swap_high 95
visible_hostname shadow
unique_hostname shadow-DHS
shutdown_lifetime 0 second
request_entities on
half_closed_clients off
max_filedesc 65535
connect_timeout 5 seconds
connect_retries 2
cache_effective_group squid
buffered_logs on
#access_log stdio:/var/log/squid/access.log squid
access_log daemon:/var/log/squid/access.log
#access_log none
netdb_filename none
client_db off
dns_nameservers 127.0.0.1 127.0.0.1 192.168.2.2 192.168.1.96
ipcache_size 20000
ipcache_low 90
ipcache_high 95
dns_v4_first on
negative_ttl 5 minutes
positive_dns_ttl 30 days
negative_dns_ttl 5 minutes
dns_retransmit_interval 2 seconds
check_hostnames off
forwarded_for delete
via off
httpd_suppress_version_string on
# mem and cache size
#collapsed_forwarding on
cache_mem 10 GB
#memory_cache_mode disk
maximum_object_size 3 GB
maximum_object_size_in_memory 3 GB
store_objects_per_bucket 40
digest_generation off
#digest_bits_per_entry 8
pinger_enable off
memory_pools on
max_stale 4 months


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Security

Optimized Squid Config for Squid v4.0.4

For those of you who are squid optimization geeks. Below is my latest iteration of the squid.conf file I am now using for 4.0.4

#
#Recommended minimum configuration:
#
always_direct allow all

# 3 workers, using worker #1 as the frontend is important

# Example rule allowing access from your local networks.
# Adapt to list your (internal) IP networks from where browsing
# should be allowed
acl localnet src 192.168.0.0/16
acl localnet src fc00::/7
acl localnet src fe80::/10 # RFC1918 possible internal network
acl Safe_ports port 1-65535 # RFC1918 possible internal network
acl CONNECT method GET POST HEAD OPTIONS CONNECT PUT DELETE # RFC1918 possible internal network
#acl block-fnes urlpath_regex -i .*/fnes/echo # RFC 4193 local private network range
acl noscan dstdomain symantecliveupdate.com liveupdate.symantec.com psi3.secunia.com update.immunet.com avstats.avira.com premium.avira-update.com 8f8fb293be49781da3e3229cd4469a18.da3e3.net # RFC 4291 link-local (directly plugged) machines

# Disable alternate protocols
request_header_access Alternate-Protocol deny all
reply_header_access Alternate-Protocol deny all

#acl video urlpath_regex -i \.(mpa|m2a|mpe|avi|mov|mpg|mpg3|mpg4|mpeg|m1s|mp2v|m2v|m2s|wmx|rm|rmvb|3pg|3gpp|omg|ogm|asf|asx|mp2|mp3|mp4|wmv|flv|ts|f4v|f4m)

#
# Recommended minimum Access Permission configuration:
#
# Only allow cachemgr access from localhost

no_cache deny noscan
always_direct allow noscan
#no_cache deny video
#always_direct allow video

# Deny requests to certain unsafe ports

# Deny CONNECT to other than secure SSL ports

# We strongly recommend the following be uncommented to protect innocent
# web applications running on the proxy server who think the only
# one who can access services on .localhost. is a local user
#http_access deny to_localhost

#
# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
#
#cache_peer 192.168.1.1 parent 8080 0 default no-query no-digest no-netdb-exchange
#never_direct allow all

# Example rule allowing access from your local networks.
# Adapt localnet in the ACL section to list your (internal) IP networks
# from where browsing should be allowed

http_access allow all

# allow localhost always proxy functionality

# And finally deny all other access to this proxy

# Squid normally listens to port 3128
pipeline_prefetch 7
read_ahead_gap 256 MB
client_request_buffer_max_size 4096 KB
request_header_max_size 2048 KB
reply_header_max_size 2048 KB
#quick_abort_min -1 KB
#quick_abort_pct 100
#range_offset_limit -1
eui_lookup off
http_port 0.0.0.0:8080 intercept disable-pmtu-discovery=always
http_port 0.0.0.0:3128
tcp_outgoing_address 192.168.2.2
connect_retries 1

client_persistent_connections on
server_persistent_connections on
detect_broken_pconn on

# We recommend you to use at least the following line.
#hierarchy_stoplist cgi-bin ?

# Uncomment and adjust the following to add a disk cache directory.
#cache_dir diskd /ssd/0 54000 32 256 Q1=256 Q2=144
#cache_dir diskd /ssd/1 54000 32 256 Q1=256 Q2=144
#cache_dir diskd /ssd/3 54000 32 256 Q1=256 Q2=144

#cache_dir diskd /ssd2/0 68000 32 256 Q1=256 Q2=144
#cache_dir diskd /ssd2/1 68000 32 256 Q1=256 Q2=144
#cache_dir diskd /ssd2/3 68000 32 256 Q1=256 Q2=144

cache_dir ufs /ssd/0 32000 1024 256
cache_dir ufs /ssd/1 32000 1024 256
cache_dir ufs /ssd/2 32000 1024 256
cache_dir ufs /ssd/3 32000 1024 256
cache_dir ufs /ssd/4 32000 1024 256
cache_dir ufs /ssd/5 32000 1024 256

cache_dir ufs /ssd2/0 43000 1024 256
cache_dir ufs /ssd2/1 43000 1024 256
cache_dir ufs /ssd2/2 43000 1024 256
cache_dir ufs /ssd2/3 43000 1024 256
cache_dir ufs /ssd2/4 43000 1024 256
cache_dir ufs /ssd2/6 43000 1024 256

store_dir_select_algorithm round-robin
#cache_replacement_policy heap GDSF
#memory_replacement_policy heap GDSF

# Leave coredumps in the first cache dir
coredump_dir /var/cache/squid

# Add any of your own refresh_pattern entries above these.
# General Rules
#cache images

refresh_pattern -i \.(gif|png|ico|jpg|jpeg|jp2|webp)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(jpx|j2k|j2c|fpx|bmp|tif|tiff|bif)$ 100000 90% 20000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(pcd|pict|rif|exif|hdr|bpg|img|jif|jfif)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(woff|woff2|eps|ttf|otf|svg|svgi|svgz|ps|ps1|acsm|eot)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private

#cache content
refresh_pattern -i \.(swf|js|ejs)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(wav|css|class|dat|zsci|ver|advcs)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private

#cache videos
refresh_pattern -i \.(mpa|m2a|mpe|avi|mov|mpg|mpeg|mpg3|mpg4|mpg5)$ 0 90% 200000 reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(m1s|mp2v|m2v|m2s|m2ts|wmx|rm|rmvb|3pg|3gpp|omg|ogm|asf|war)$ 0 90% 200000 reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(asx|mp2|mp3|mp4|mp5|wmv|flv|mts|f4v|f4|pls|midi|mid)$ 0 90% 200000 reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(htm|html)$ 9440 90% 200000 reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(xml|flow|asp|aspx)$ 0 90% 200000
refresh_pattern -i \.(json)$ 0 90% 200000
refresh_pattern -i (/cgi-bin/|\?) 0 90% 200000

#live video cache rules
refresh_pattern -i \.(m3u8|ts)$ 0 90% 200000

#cache specific sites
refresh_pattern -i ^http:\/\/liveupdate.symantecliveupdate.com.*\(zip)$ 0 0% 0
refresh_pattern -i ^http:\/\/premium.avira-update.com.*\(gz) 0 0% 0
refresh_pattern -i microsoft.com/.*\.(cab|exe|msi|msu|msf|asf|wma|dat|zip)$ 4320 80% 43200
refresh_pattern -i windowsupdate.com/.*\.(cab|exe|msi|msu|msf|asf|wma|wmv)|dat|zip)$ 4320 80% 43200
refresh_pattern -i windows.com/.*\.(cab|exe|msi|msu|msf|asf|wmv|wma|dat|zip)$ 4320 80% 43200
refresh_pattern -i apple.com/.*\.(cab|exe|msi|msu|msf|asf|wmv|wma|dat|zip|dist)$ 0 80% 4320

#cache binaries
refresh_pattern -i \.(app|bin|deb|rpm|drpm|exe|zip|zipx|tar|tgz|tbz2|tlz|iso|arj|cfs|dar|jar)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(bz|bz2|ipa|ram|rar|uxx|gz|msi|dll|lz|lzma|7z|s7z|Z|z|zz|sz)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(exe|msi)$ 0 90% 200000
refresh_pattern -i \.(cab|psf|vidt|apk|wtex|hz|ova|ovf)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private

#cache microsoft and adobe and other documents
refresh_pattern -i \.(ppt|pptx|doc|docx|docm|docb|dot|pdf|pub|ps)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private
refresh_pattern -i \.(xls|xlsx|xlt|xlm|xlsm|xltm|xlw|csv|txt)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private
#refresh_pattern -i ^ftp: 100000 90% 200000
#refresh_pattern -i ^gopher: 1440 0% 1440

#allow caching of other things based on cache control headers with some exceptions
refresh_pattern -i . 0 90% 200000

log_icp_queries off
icp_port 0
htcp_port 0
acl snmppublic snmp_community public
snmp_port 3401
snmp_incoming_address 192.168.2.2
snmp_access allow snmppublic all
minimum_object_size 0 KB
cache_effective_user squid
#header_replace User-Agent Mozilla/5.0 (X11; U;) Gecko/20080221 Firefox/2.0.0.9
vary_ignore_expire on
cache_swap_low 90
cache_swap_high 95
visible_hostname shadow
unique_hostname shadow-DHS
shutdown_lifetime 0 second
request_entities on
half_closed_clients off
max_filedesc 65535
connect_timeout 10 seconds
cache_effective_group squid
buffered_logs on
#access_log /var/log/squid/access.log squid
access_log daemon:/var/log/squid/access.log buffer-size=256KB
#access_log none
netdb_filename none
client_db off
dns_nameservers 127.0.0.1 127.0.0.1 192.168.2.2 192.168.1.96
ipcache_size 10000
ipcache_low 90
ipcache_high 95
dns_v4_first on
negative_ttl 5 minutes
positive_dns_ttl 30 days
negative_dns_ttl 5 minutes
dns_retransmit_interval 1 seconds
check_hostnames off
forwarded_for delete
via off
httpd_suppress_version_string on
# mem and cache size
#collapsed_forwarding on
cache_mem 4 GB
memory_cache_mode disk
maximum_object_size 2 GB
maximum_object_size_in_memory 2 GB
digest_generation off
#digest_bits_per_entry 8
pinger_enable off
memory_pools on
max_stale 4 months


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Security

My latest optimized squid proxy squid.conf configuration file (squid version 4.0.3)

#You will need to replace x.x.x.x with your own ip configuration. The refresh policy included in this configuration cached hits in the range of 40-60%

 

#
#Recommended minimum configuration:
#
always_direct allow all

# Example rule allowing access from your local networks.
# Adapt to list your (internal) IP networks from where browsing
# should be allowed
acl localnet src x.x.0.0/16
acl localnet src fc00::/7
acl localnet src fe80::/10 # RFC1918 possible internal network
acl Safe_ports port 1-65535 # RFC1918 possible internal network
acl CONNECT method GET POST HEAD OPTIONS CONNECT PUT DELETE # RFC1918 possible internal network
#acl block-fnes urlpath_regex -i .*/fnes/echo # RFC 4193 local private network range
acl noscan dstdomain symantecliveupdate.com liveupdate.symantec.com psi3.secunia.com update.immunet.com avstats.avira.com premium.avira-update.com 8f8fb293be49781da3e3229cd4469a18.da3e3.net # RFC 4291 link-local (directly plugged) machines

#acl video urlpath_regex -i \.(mpa|m2a|mpe|avi|mov|mpg|mpg3|mpg4|mpeg|m1s|mp2v|m2v|m2s|wmx|rm|rmvb|3pg|3gpp|omg|ogm|asf|asx|mp2|mp3|mp4|wmv|flv|ts|f4v|f4m)

#
# Recommended minimum Access Permission configuration:
#
# Only allow cachemgr access from localhost

no_cache deny noscan
always_direct allow noscan
#no_cache deny video
#always_direct allow video

# Deny requests to certain unsafe ports

# Deny CONNECT to other than secure SSL ports

# We strongly recommend the following be uncommented to protect innocent
# web applications running on the proxy server who think the only
# one who can access services on .localhost. is a local user
#http_access deny to_localhost

#
# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
#
#cache_peer 192.168.1.1 parent 8080 0 default no-query no-digest no-netdb-exchange
#never_direct allow all

# Example rule allowing access from your local networks.
# Adapt localnet in the ACL section to list your (internal) IP networks
# from where browsing should be allowed

http_access allow all

# allow localhost always proxy functionality

# And finally deny all other access to this proxy
# Squid normally listens to port 3128
pipeline_prefetch 4
read_ahead_gap 256 MB
client_request_buffer_max_size 16 MB
#quick_abort_min -1 KB
#quick_abort_pct 100
#range_offset_limit -1
eui_lookup off
http_port 0.0.0.0:8080 intercept disable-pmtu-discovery=always
http_port 0.0.0.0:3128
tcp_outgoing_address x.x.x.x
connect_retries 2

client_persistent_connections on
server_persistent_connections on
detect_broken_pconn on

# We recommend you to use at least the following line.
#hierarchy_stoplist cgi-bin ?
# Uncomment and adjust the following to add a disk cache directory.
#cache_dir diskd /ssd/0 54000 32 256 Q1=256 Q2=144
#cache_dir diskd /ssd/1 54000 32 256 Q1=256 Q2=144
#cache_dir diskd /ssd/3 54000 32 256 Q1=256 Q2=144

#cache_dir diskd /ssd2/0 68000 32 256 Q1=256 Q2=144
#cache_dir diskd /ssd2/1 68000 32 256 Q1=256 Q2=144
#cache_dir diskd /ssd2/3 68000 32 256 Q1=256 Q2=144

cache_dir ufs /ssd/0 54000 128 512
cache_dir ufs /ssd/1 54000 128 512
cache_dir ufs /ssd/3 54000 128 512

cache_dir ufs /ssd2/0 68000 128 512
cache_dir ufs /ssd2/1 68000 128 512
cache_dir ufs /ssd2/3 68000 128 512

store_dir_select_algorithm round-robin
#cache_replacement_policy heap GDSF
#memory_replacement_policy heap GDSF

# Leave coredumps in the first cache dir
coredump_dir /var/cache/squid
# Add any of your own refresh_pattern entries above these.
# General Rules
#cache images

refresh_pattern -i \.(gif|png|ico|jpg|jpeg|jp2|webp)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private refresh-ims
refresh_pattern -i \.(jpx|j2k|j2c|fpx|bmp|tif|tiff|bif)$ 100000 90% 20000 override-expire reload-into-ims ignore-no-store ignore-private refresh-ims
refresh_pattern -i \.(pcd|pict|rif|exif|hdr|bpg|img|jif|jfif)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private refresh-ims
refresh_pattern -i \.(woff|woff2|eps|ttf|otf|svg|svgi|svgz|ps|ps1|acsm|eot)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private refresh-ims

#cache content
refresh_pattern -i \.(swf|js|ejs)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private refresh-ims
refresh_pattern -i \.(wav|css|class|dat|zsci|ver|advcs)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private refresh-ims

#cache videos
refresh_pattern -i \.(mpa|m2a|mpe|avi|mov|mpg|mpeg|mpg3|mpg4|mpg5)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private refresh-ims
refresh_pattern -i \.(m1s|mp2v|m2v|m2s|m2ts|wmx|rm|rmvb|3pg|3gpp|omg|ogm|asf|war)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private refresh-ims
refresh_pattern -i \.(asx|mp2|mp3|mp4|mp5|wmv|flv|mts|f4v|f4|pls|midi|mid)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private refresh-ims
refresh_pattern -i \.(htm|html)$ 9440 90% 200000 reload-into-ims ignore-no-store ignore-private refresh-ims
refresh_pattern -i \.(xml|flow|asp|aspx)$ 0 90% 200000 refresh-ims
refresh_pattern -i \.(json)$ 0 90% 200000 refresh-ims
refresh_pattern -i (/cgi-bin/|\?) 0 90% 200000

#live video cache rules
refresh_pattern -i \.(m3u8|ts)$ 0 90% 200000 refresh-ims

#cache specific sites
refresh_pattern -i ^http:\/\/liveupdate.symantecliveupdate.com.*\(zip)$ 0 0% 0
refresh_pattern -i ^http:\/\/premium.avira-update.com.*\(gz) 0 0% 0
refresh_pattern -i microsoft.com/.*\.(cab|exe|msi|msu|msf|asf|wma|dat|zip)$ 4320 80% 43200 reload-into-ims refresh-ims
refresh_pattern -i windowsupdate.com/.*\.(cab|exe|msi|msu|msf|asf|wma|wmv)|dat|zip)$ 4320 80% 43200 reload-into-ims refresh-ims
refresh_pattern -i windows.com/.*\.(cab|exe|msi|msu|msf|asf|wmv|wma|dat|zip)$ 4320 80% 43200 reload-into-ims refresh-ims
refresh_pattern -i apple.com/.*\.(cab|exe|msi|msu|msf|asf|wmv|wma|dat|zip|dist)$ 0 80% 43200 reload-into-ims refresh-ims

#cache binaries
refresh_pattern -i \.(app|bin|deb|rpm|drpm|exe|zip|zipx|tar|tgz|tbz2|tlz|iso|arj|cfs|dar|jar)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private refresh-ims
refresh_pattern -i \.(bz|bz2|ipa|ram|rar|uxx|gz|msi|dll|lz|lzma|7z|s7z|Z|z|zz|sz)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private refresh-ims
refresh_pattern -i \.(exe|msi)$ 0 90% 200000 refresh-ims
refresh_pattern -i \.(cab|psf|vidt|apk|wtex|hz|ova|ovf)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private refresh-ims

#cache microsoft and adobe and other documents
refresh_pattern -i \.(ppt|pptx|doc|docx|docm|docb|dot|pdf|pub|ps)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private refresh-ims
refresh_pattern -i \.(xls|xlsx|xlt|xlm|xlsm|xltm|xlw|csv|txt)$ 100000 90% 200000 override-expire reload-into-ims ignore-no-store ignore-private refresh-ims
#refresh_pattern -i ^ftp: 100000 90% 200000
#refresh_pattern -i ^gopher: 1440 0% 1440

#allow caching of other things based on cache control headers with some exceptions
refresh_pattern -i . 0 90% 200000 refresh-ims

log_icp_queries off
icp_port 0
htcp_port 0
acl snmppublic snmp_community public
snmp_port 3401
snmp_incoming_address x.x.x.x
snmp_access allow snmppublic all
minimum_object_size 0 KB
cache_effective_user squid
#header_replace User-Agent Mozilla/5.0 (X11; U;) Gecko/20080221 Firefox/2.0.0.9
vary_ignore_expire on
cache_swap_low 90
cache_swap_high 95
visible_hostname shadow
unique_hostname shadow-DHS
shutdown_lifetime 0 second
request_header_max_size 2048 KB
reply_header_max_size 2048 KB
request_entities on
half_closed_clients off
max_filedesc 65535
connect_timeout 15 seconds
cache_effective_group squid
buffered_logs on
#access_log /var/log/squid/access.log squid
access_log daemon:/var/log/squid/access.log buffer-size=1024KB
#access_log none
netdb_filename none
client_db off
dns_nameservers x.x.x.x x.x.x.x x.x.x.x
ipcache_size 10000
ipcache_low 90
ipcache_high 95
dns_v4_first on
negative_ttl 5 minutes
positive_dns_ttl 30 days
negative_dns_ttl 5 minutes
dns_retransmit_interval 1 seconds
check_hostnames off
forwarded_for delete
via off
httpd_suppress_version_string on
# mem and cache size
#collapsed_forwarding on
cache_mem 8 GB
memory_cache_mode disk
maximum_object_size 2 GB
maximum_object_size_in_memory 2 GB
digest_generation off
#digest_bits_per_entry 8
pinger_enable off
memory_pools on
max_stale 4 months


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Personal

Optimized Squid proxy squid.conf configuration example

#
#Recommended minimum configuration:
#
always_direct allow all

# Example rule allowing access from your local networks.
# Adapt to list your (internal) IP networks from where browsing
# should be allowed
acl localnet src 192.168.0.0/16
acl localnet src fc00::/7
acl localnet src fe80::/10 # RFC1918 possible internal network
acl Safe_ports port 1-65535 # RFC1918 possible internal network
acl CONNECT method GET POST HEAD CONNECT PUT DELETE # RFC1918 possible internal network
#acl block-fnes urlpath_regex -i .*/fnes/echo # RFC 4193 local private network range
acl noscan dstdomain symantecliveupdate.com liveupdate.symantec.com psi3.secunia.com update.immunet.com avstats.avira.com premium.avira-update.com 8f8fb293be49781da3e3229cd4469a18.da3e3.net # RFC 4291 link-local (directly plugged) machines

#acl video urlpath_regex -i \.(mpa|m2a|mpe|avi|mov|mpg|mpg3|mpg4|mpeg|m1s|mp2v|m2v|m2s|wmx|rm|rmvb|3pg|3gpp|omg|ogm|asf|asx|mp2|mp3|mp4|wmv|m3u8|flv|ts|f4v|f4m)

#
# Recommended minimum Access Permission configuration:
#
# Only allow cachemgr access from localhost

no_cache deny noscan
always_direct allow noscan
#no_cache deny video
#always_direct allow video

# Deny requests to certain unsafe ports

# Deny CONNECT to other than secure SSL ports

# We strongly recommend the following be uncommented to protect innocent
# web applications running on the proxy server who think the only
# one who can access services on .localhost. is a local user
#http_access deny to_localhost

#
# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
#
#cache_peer 192.168.1.1 parent 8080 0 default no-query no-digest no-netdb-exchange
#never_direct allow all

# Example rule allowing access from your local networks.
# Adapt localnet in the ACL section to list your (internal) IP networks
# from where browsing should be allowed

http_access allow all

# allow localhost always proxy functionality

# And finally deny all other access to this proxy
# Squid normally listens to port 3128
#pipeline_prefetch 7
read_ahead_gap 256 MB
client_request_buffer_max_size 1 MB
#quick_abort_min -1 KB
#range_offset_limit -1
eui_lookup off
http_port 0.0.0.0:8080 intercept disable-pmtu-discovery=always
http_port 0.0.0.0:3128
tcp_outgoing_address 192.168.2.2
connect_retries 5

client_persistent_connections on
server_persistent_connections on

# We recommend you to use at least the following line.
#hierarchy_stoplist cgi-bin ?
# Uncomment and adjust the following to add a disk cache directory.
#cache_dir diskd /ssd/0 54000 32 256 Q1=256 Q2=296
#cache_dir diskd /ssd/1 54000 32 256 Q1=256 Q2=296
#cache_dir diskd /ssd/3 54000 32 256 Q1=256 Q2=296

#cache_dir diskd /ssd2/0 68000 32 256
#cache_dir diskd /ssd2/1 68000 32 256
#cache_dir diskd /ssd2/3 68000 32 256

cache_dir ufs /ssd/0 54000 32 256
cache_dir ufs /ssd/1 54000 32 256
cache_dir ufs /ssd/3 54000 32 256

cache_dir diskd /ssd2/0 68000 32 256 Q1=256 Q2=296
cache_dir diskd /ssd2/1 68000 32 256 Q1=256 Q2=296
cache_dir diskd /ssd2/3 68000 32 256 Q1=256 Q2=296

store_dir_select_algorithm round-robin
#cache_replacement_policy heap LFUDA
#memory_replacement_policy heap LFUDA

# Leave coredumps in the first cache dir
coredump_dir /var/cache/squid

# Add any of your own refresh_pattern entries above these.
# General Rules
refresh_pattern -i \.(gif)|png|jp(g|eg|2)[?])$ 220000 90% 300000 override-expire reload-into-ims ignore-no-store ignore-private refresh-ims store-stale
refresh_pattern -i \.(jpx|j2k|j2c|fpx|ico|bmp|tif(f)|webp|bif|ver|pcd|pict|rif|exif|hdr|bpg|img|[?])$ 220000 90% 300000 override-expire reload-into-ims ignore-no-store ignore-private refresh-ims store-stale
refresh_pattern -i \.(swf|js)$ 220000 90% 300000 override-expire reload-into-ims ignore-no-store ignore-private refresh-ims store-stale
refresh_pattern -i \.(wav|c(la)ss|dat|zsci|ver|advcs|woff(|2)|eps|ttf|svgi(|z)|ps(1))|acsm)$ 220000 90% 300000 override-expire reload-into-ims ignore-no-store ignore-private refresh-ims store-stale
refresh_pattern -i \.(mpa|m2a|mpe|avi|mov|mpg(|3|4))$ 220000 90% 300000 reload-into-ims ignore-no-store ignore-private refresh-ims store-stale
refresh_pattern -i \.(mpeg|m1s|mp2v|m2v|m2s|wmx|rm|rmvb|3pg|3gpp|omg|ogm|asf|asx|mp(2|3|4)|wmv|m3u8|flv|ts|f4(v|m))$ 220000 90% 300000 reload-into-ims ignore-no-store ignore-private refresh-ims store-stale
refresh_pattern -i \.(htm(|l)|crl)$ 9440 90% 300000 reload-into-ims refresh-ims ignore-no-store ignore-private store-stale
refresh_pattern -i \.(xml|flow|asp(|x))$ 0 90% 300000
refresh_pattern -i \.(json)$ 0 90% 300000
refresh_pattern -i (/cgi-bin/|\?) 0 0% 300000
refresh_pattern -i ^http:\/\/liveupdate.symantecliveupdate.com.*\(zip)$ 0 0% 0
refresh_pattern -i ^http:\/\/premium.avira-update.com.*\(gz) 0 0% 0
refresh_pattern -i microsoft.com/.*\.(cab|exe|ms(i|u|f)|asf|wm(v|a)|dat|zip)$ 4320 80% 43200 reload-into-ims refresh-ims
refresh_pattern -i windowsupdate.com/.*\.(cab|exe|ms(i|u|f)|asf|wm(v|a)|dat|zip)$ 4320 80% 43200 reload-into-ims refresh-ims
refresh_pattern -i windows.com/.*\.(cab|exe|ms(i|u|f)|asf|wm(v|a)|dat|zip)$ 4320 80% 43200 reload-into-ims refresh-ims
refresh_pattern -i \.(bin|deb|rpm|drpm|exe|zip|tar|tgz)$ 220000 90% 300000 override-expire reload-into-ims refresh-ims ignore-no-store ignore-private store-stale
refresh_pattern -i \.(bz(|2)|ipa|ram|rar|bin|uxx|gz|crl|msi|dll|hz|cab|psf|vidt|apk|wtex|hz|ov(a|f))$ 220000 90% 300000 override-expire reload-into-ims refresh-ims ignore-no-store ignore-private store-stale
refresh_pattern -i \.(ppt|pptx|doc(x|m|b)|dot|pdf|pub|xl(s|sx|t|m|lsm|tm|w)|csv|txt)$ 220000 90% 300000 override-expire reload-into-ims refresh-ims ignore-no-store ignore-private store-stale
#refresh_pattern -i ^ftp: 66000 90% 200000
#refresh_pattern -i ^gopher: 1440 0% 1440
refresh_pattern -i . 0 90% 300000 override-expire reload-into-ims refresh-ims ignore-no-store store-stale ignore-private
log_icp_queries off
icp_port 0
htcp_port 0
acl snmppublic snmp_community public
snmp_port 3401
snmp_access allow snmppublic all
minimum_object_size 0 KB
cache_effective_user squid
#header_replace User-Agent Mozilla/5.0 (X11; U;) Gecko/20080221 Firefox/2.0.0.9
vary_ignore_expire off
reload_into_ims on
cache_swap_low 85
cache_swap_high 90
visible_hostname shadow
unique_hostname shadow-DHS
shutdown_lifetime 0 second
request_header_max_size 512 KB
reply_header_max_size 512 KB
request_entities on
half_closed_clients off
max_filedesc 65535
connect_timeout 4 second
cache_effective_group squid
buffered_logs on
#access_log /var/log/squid/access.log squid
access_log daemon:/var/log/squid/access.log buffer-size=2048KB
#access_log none
netdb_filename none
client_db off
dns_nameservers 127.0.0.1 127.0.0.1 192.168.2.2 192.168.1.96
ipcache_size 8096
ipcache_low 90
ipcache_high 95
dns_v4_first on
negative_ttl 5 minutes
positive_dns_ttl 30 days
negative_dns_ttl 5 minutes
dns_retransmit_interval 1 seconds
detect_broken_pconn on
check_hostnames off
forwarded_for delete
via off
httpd_suppress_version_string on
# mem and cache size
#collapsed_forwarding on
cache_mem 12 GB
memory_cache_mode disk
maximum_object_size 12 GB
maximum_object_size_in_memory 12 GB
digest_generation off
#digest_bits_per_entry 16
pinger_enable off
memory_pools on
cache_store_log none
max_stale 1 month
#workers 4
#memory_cache_shared on


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Security

[ISN] Severe weaknesses in Android handsets could leak user fingerprints

http://arstechnica.com/security/2015/08/severe-weaknesses-in-android-handsets-could-leak-user-fingerprints/ By Dan Goodin Ars Technica Aug 10, 2015 HTC and Samsung have patched serious vulnerabilities in some of their Android phones that made it possible for malicious hackers to steal user fingerprints. The researchers who discovered the flaws said that many more phones from all manufacturers may be susceptible to other types of fingerprint-theft attacks. The most serious of the flaws was found on HTC’s One Max handset. According to researchers at security firm FireEye, the device saved user fingerprints as an unencrypted file. Almost as bad, the BMP image was readable by any other running application or process. As a result, any unprivileged process or app could obtain a user’s fingerprints by reading the file. Attackers could capitalize on the weakness by exploiting one of the many serious vulnerabilities that regularly crop up in Android or by tricking a target into installing a malicious app. HTC fixed the issue after FireEye privately reported it, according to this summary, which didn’t provide a date or other details of the update. […]


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