Squid proxy

Squid forward all requests to another proxy

cache_peer ipofparentproxy parent <port> 0 no-query default

#cache_peer_access ipofparentproxy allow !localnet

acl all src 0.0.0.0/0.0.0.0
http_access allow all

#never_direct deny noanotherproxyservers

never_direct allow all

#dns_nameservers ipofdnsa, ipofdnsb

Parameters

never_direct allow all 

By default squid always contacts the origin server to satisfy https requests

squid daemon know about a parent cache and squid can not connect directly to origin servers 

cache_peer_access peername allow|deny [!]ACLname

The cache_peer_access rules determine which requests Squid will forward to a particular neighbor. If a particular request is denied by a cache_peer_access list, Squid doesn’t forward the request to that neighbor. 

cache_peer_domain peer-cache.otherdomain.example !.mydomain.example

This tag is used to communicate with different caches depending on the domain that the request is destined for. To ensure that you don't query another cache server for your local domain, you can use the following config line:

refresh_pattern [-i] regexp min percent max [options]

refresh_pattern -i .gif$ 1440 20% 10080.

It helps Squid decide whether or not a given request can be a cache hit or must be treated as a miss.

refresh_pattern -i .gif$ 1440 20% 10080.

It helps Squid decide whether or not a given request can be a cache hit or must be treated as a miss.