Squid Proxy Server Change Outgoing IP Address

Posted on in Categories , , last updated January 15, 2013

I have Squid caching proxy server deployed on Rackspace based server in UK. This server has four IP address. I would like to change outgoing IP addresses from default to How do I change proxy server outgoing IP address under Linux or Unix operating systems?

You need to configure the option tcp_outgoing_address in squid.conf file. This option allows you to map requests to different outgoing IP addresses. The IP address can be based on the username or source address of the user making the request. The syntax is:

tcp_outgoing_address YOUR-IP-ADDRESS-HERE


Edit the squid.conf file:
# vi /etc/squid/squid.conf
Find or add the following configuration directive:


Save and close the file. Reload the squid proxy server / config file changes by typing the following command:
# squid -k reconfigure
# service squid reload

Setting up multiple outgoing IP addresses

You can forward clients request based on IPs for certain users:

#define acl
acl admin
acl tom
acl raj
# set up outgoing rule
tcp_outgoing_address admin
tcp_outgoing_address tom
tcp_outgoing_address raj

However, forwarding clients with dedicated IPs for certain subnets is more useful:

## full filtering enabled using iptables on and routed via squid##
acl throttle_service_net src
## admins are skip from this limits ##
acl admins_service_net src
## Set rules ##
tcp_outgoing_address throttle_service_net
tcp_outgoing_address admins_service_net

4 comment

  1. I installed squid transparent proxy server in one system(eth0= ,eth1= I deployed one application in one system (proxy Client, eth0= .We have router with IP

    Now i can access this application from lan (proxy server area .But i am unable to access this application from and External network.

    Can you please help me how can i give remote access of app. of proxy client system.

    Thanks, Srinivas

  2. Guys, i need my web cache to show client or system’s exact IP public address instead of showing its own IP.

    Thanks in advance.

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