[squid-users] Forwarded-for functionality(squid)

Amos Jeffries squid3 at treenet.co.nz
Tue Sep 8 11:21:46 UTC 2020

On 8/09/20 9:52 pm, Matus UHLAR - fantomas wrote:
> On 08.09.20 09:01, piyush.gaba wrote:
>> I would like to ask for your inputs/resolution for one of the issues
>> that I am facing while using forwarded_for functionality with new
>> version of squid i.e. v4.13
>> UseCase:
>> I have a client, a webserver and squid hosted in 3 different VMs.  I have
>> set up interfaces in such a way that Client cannot access webserver
>> directly, but only through squid proxy.(Works fine)
>> Now, When I append forwarded_for off to my squid.conf and then curl the
>> webserver from client [ curl {Webserver.mgmtIP} ], the expected logs on
>> webserver should have, "unknown" at the end of line.
> You can configure webserver to log contents of X-Forwarded-For: line.
> Note that that line can contain anything clients can send.
> So, unless you really want to see that content, don't log it.
>> And if there is nothing appended or forwarded_for on is appended, it
>> should have "Client_IP" at the end of the line in log file.
>> But I am not getting expected output.

In squid.conf add this to see the HTTP messages going through Squid and
understand what is going on:

  debug_options 11,2


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