A light weight Squid Proxy can be used to cached RPM and Deb packages for both RedHat (CentOS) and Debian based Linux systems. The squid proxy server can be configured to require a login by proxy clients. Both YUM and APT-GET can be configured to use the proxy server for downloading package updates. Once one client has download a specific package it will be cached on the Squid Proxy server such that other hosts requesting the same package will not need to use Internet bandwidth to do so. One caveat is that all YUM and APT clients need to use the same mirror for updates, otherwise if the same package is coming from different mirrors it will get downloaded from the Internet multiple times.

# # Recommended minimum configuration: #

# Example rule allowing access from your local networks. # Adapt to list your (internal) IP networks from where browsing # should be allowed acl localnet src 10.0.0.0/8 # RFC1918 possible internal network acl localnet src 172.16.0.0/12 # RFC1918 possible internal network acl localnet src 192.168.0.0/16 # RFC1918 possible internal network acl localnet src fc00::/7 # RFC 4193 local private network range acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) machines

acl SSL_ports port 443 acl Safe_ports port 80 # http acl Safe_ports port 21 # ftp acl Safe_ports port 443 # https acl Safe_ports port 70 # gopher acl Safe_ports port 210 # wais acl Safe_ports port 1025-65535 # unregistered ports acl Safe_ports port 280 # http-mgmt acl Safe_ports port 488 # gss-http acl Safe_ports port 591 # filemaker acl Safe_ports port 777 # multiling http acl CONNECT method CONNECT

# Auth auth_param basic program /usr/lib64/squid/basic_ncsa_auth /etc/squid/passwd auth_param basic children 5 auth_param basic realm Squid Basic Authentication auth_param basic credentialsttl 2 hours acl auth_users proxy_auth REQUIRED http_access allow auth_users

# # Recommended minimum Access Permission configuration: # # Deny requests to certain unsafe ports http_access deny !Safe_ports

# Deny CONNECT to other than secure SSL ports http_access deny CONNECT !SSL_ports

# Only allow cachemgr access from localhost http_access allow localhost manager http_access deny manager

# 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 #

# 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 localnet http_access allow localhost

# And finally deny all other access to this proxy http_access deny all

# Squid normally listens to port 3128 http_port 3128

# Uncomment and adjust the following to add a disk cache directory. #cache_dir ufs /var/spool/squid 100 16 256 cache_dir ufs /squid-cache 45000 16 256

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

# # Add any of your own refresh_pattern entries above these. # refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern . 0 20% 4320