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CentOS 5.8 + Squid 3 - Changing Outoing IP Address Issues
#1
Hello,

Im using the latest version of Squid 3.1.8 listening on port 3222 and i have everything setup properly and it appears to be working as expected. Im able to get my browser to connect through the Proxy and work normally, though i can't seem to be able to change the IP Squid uses for outgoing connections.

My server is running CentOS 5.8 with cPanel 11.32
Aside from the main server IP i have 18 other external IP addressed properly configured to the server.

For example lets say my main server IP is 1.1.1.1 and the other IP addresses are 2.2.2.2 - 2.2.2.19

So currently when i set my browsers proxy setting to use 1.1.1.1:3222 im able to connect through the proxy properly and when i go to any WhatismyIP website it shows that i in fact my IP is 1.1.1.1.

Now im wanting to change the outgoing IP Squid uses to 2.2.2.19.
Reading online i found that i should be using "tcp_outgoing_address" so in my Squid.conf file i have setup "tcp_outgoing_address 2.2.2.19" and saved and restarted Squid.

Now when i point my browser to 1.1.1.1:3222 and connect everything seems to be working as normal but if i check my external IP it is still 1.1.1.1 and not 2.2.2.19. Im even able to tell my browser to connect to 2.2.2.19:3222 and i successfully connect but while viewing my IP address with a WhatismyIP website it still is showing that my IP is the main server ip 1.1.1.1

Though here is where things get confusing (to me anyways), If i view a whatismyIP website i always see the main server ip 1.1.1.1. But if i view a page hosted on my server that shows my ip (such as a 404 page i have setup with "<!--#echo var="REMOTE_ADDR" -->") it shows the IP 2.2.2.19.

So outside the server websites see me as the main server IP but a site within the server shows the IP im wanting Squid to use as the external.

How can i change the external IP squid uses so i would be able to connect and point my browse to use 1.1.1.1:3222 (What squid is listening on) and browse websites using the IP 2.2.2.19 ?

Here is my Squid.conf file, i have edited my real IPs to the Example IPs i have stated above. You can see at the bottom where i use "tcp_outgoing_address"

Code:
#
# Recommended minimum configuration:
#
acl manager proto cache_object
acl localhost src 127.0.0.1/32 ::1
acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1

# 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

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

# 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

# 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
acl our_networks src [B]My Real IP Here[/B]
http_access allow our_networks

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

# Squid normally listens to port 3128
http_port 3222

# 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 ufs /var/spool/squid 100 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

# Outgoing IP Address
tcp_outgoing_address 2.2.2.19
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