Share your knowledge at the LQ Wiki.
Go Back > Forums > Linux Forums > Linux - Networking
User Name
Linux - Networking This forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.


  Search this Thread
Old 07-30-2014, 09:59 PM   #1
Registered: Jun 2014
Posts: 39

Rep: Reputation: Disabled
Squid server with 2 NICs

Hi All,

I am trying to get Squid working with two interfaces as follows:
eth0 - LAN - with IP of
eth1 - DMZ - with IP of

eth1 is connected to a test PC at the moment with IP.

Squid has basic configuration to allow via port 3128 and the firewall has 3128 enabled.

While performing tcpdump of eth0 and eth1, and doing traceroute on squid server of and, I get traffic on both eth0 and eth1 as expected. However, if I try accessing the net via browser from a PC on the LAN, I only see traffic on eth0 and eth1 remains blank.

Anyone know what I am missing?

Old 07-31-2014, 01:03 PM   #2
LQ Newbie
Registered: Feb 2014
Posts: 21

Rep: Reputation: Disabled
Can you explain the firewall? This is the point where I lost it. I understand you connect to your squid server on your LAN network, port 3128 (it is set as this in the conf file? It is the default, but I thought I'd check). The the squid server will talk to the internet via, eth1, port 80. I'd have thought the firewall would be letting through or masquerading port 80.

Perhaps I just misunderstood your configuration
Old 08-01-2014, 05:31 AM   #3
Registered: Jun 2014
Posts: 39

Original Poster
Rep: Reputation: Disabled
Hi Paul,

Got it fixed. I was trying to have the proxy server a gateway and transparent proxy. I also have a proxy on the other side of an ASA. So I ended up configuring, with the help of a workmate, the LAN side proxy as child and the WAN side proxy as the parent. It all works now.



Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
I have 3 nics on squid and need a script to switch nics teky68 Linux - Newbie 2 12-15-2012 03:48 PM
[SOLVED] Squid with 2 NICs... set gateway vonedaddy Linux - Server 7 11-11-2010 01:48 AM
Squid reverse proxy with 2 nics jonfa Linux - Networking 1 05-04-2007 02:26 AM
Squid Proxy Server Multiple Nics dansif Linux - Networking 6 11-28-2006 01:42 PM
2 nics and a squid proxy mssucks Linux - Networking 4 03-06-2002 04:29 AM > Forums > Linux Forums > Linux - Networking

All times are GMT -5. The time now is 05:47 AM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Open Source Consulting | Domain Registration