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04.01.2008 at 07:55AM PDT, ID: 23285968
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Send client IP Squid

Tags: squid, squid, 3.0
Hi...

I have a squid cache configured for transparency, i want to have a setup where i will be able to let my squid send the IP Address of the client not the IP address of the squid. in summary i want the IP Address to be generated from the client and not from my squid IP Address.
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Question Stats
Zone: Networking
Question Asked By: jmokaled
Solution Provided By: ravenpl
Participating Experts: 2
Solution Grade: B
Views: 26
Translate:
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04.01.2008 at 08:14AM PDT, ID: 21254741

Rank: Wizard

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04.01.2008 at 09:06AM PDT, ID: 21255316

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04.01.2008 at 09:38AM PDT, ID: 21255666

Rank: Wizard

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04.01.2008 at 09:44AM PDT, ID: 21255725

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04.01.2008 at 09:58AM PDT, ID: 21255865

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04.01.2008 at 01:40PM PDT, ID: 21257887

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04.01.2008 at 02:21PM PDT, ID: 21258208

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04.01.2008 at 10:49PM PDT, ID: 21260419

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04.01.2008 at 11:34PM PDT, ID: 21260570

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04.02.2008 at 12:02AM PDT, ID: 21260675

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04.02.2008 at 01:02AM PDT, ID: 21260899

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04.01.2008 at 08:14AM PDT, ID: 21254741

Rank: Wizard

You can't do it, but squid adds two http request headers
X-Forwarded-For:
Via:

check them out, instead of REMOTE_ADDR
 
04.01.2008 at 09:06AM PDT, ID: 21255316
when specifying X-FORWARD-FOR do i have to specify a specific ip ? or does it originate from the source request?
 
04.01.2008 at 09:38AM PDT, ID: 21255666

Rank: Wizard

squid will set X-Forwarded-For to the source IP of connected client. If the client is another squid (browser -> squid1 -> squid1 -> wwwServer) X-Forwarded-For should contain both source IPs (browser and squid1).
This is automatically done by squid, unless configured to not append the client IP.
 
04.01.2008 at 09:44AM PDT, ID: 21255725
great, i use squid 3.0 and i just want to clarify how to configure this in my conf. Do i need to put X-Forwarded-For and that would do?
 
04.01.2008 at 09:58AM PDT, ID: 21255865

Rank: Wizard

No, as I said it's by default. You would have to change configuration to suppress this feature (for anonymous proxy).
 
04.01.2008 at 01:40PM PDT, ID: 21257887
i dont use any parent proxy in my setup, my squid contacts the web directy. so i suppose by default squid should send client IP Address to Web-Server, but this aint happening...
 
04.01.2008 at 02:21PM PDT, ID: 21258208

Rank: Wizard

> should send client IP Address to Web-Server
Only in those request headers I mentioned. How are You verifying it's not?
 
04.01.2008 at 10:49PM PDT, ID: 21260419
i suppose when i go to http://www.ip-adress.com i should see the client IP instead of the squid, which is not happening.
 
04.01.2008 at 11:34PM PDT, ID: 21260570

Rank: Wizard

No, this test is not valid. It only verifies REMOTE_IP - which have to be the ip of squid. That's how the internet works. Since squid is performing connection on behalf of the browser - squid's IP is shown on the server - not browsers.
That's why I stated in my very first post - it's impossible.
Visit temp crafted http://www.wijata.com/temp/reqh.php for verifying those headers as well.
 
04.02.2008 at 12:02AM PDT, ID: 21260675
ok, i have other Cache Engine Appliances like Netcache and Bluecoat, and with those its doable, seems that its not doable by squid.
 
04.02.2008 at 01:02AM PDT, ID: 21260899

Rank: Wizard

I guess so - squid itself is not transparent proxy (is not acting as bridge, but rather router)
Accepted Solution
 
 
05.19.2008 at 07:30AM PDT, ID: 21598090
Although question is already closed, the setup you wish to achieve is called client IP spoofing.
It is possible using TPROXY:
http://www.balabit.com/support/community/products/tproxy/
A good walkthru here:
http://web.suffieldacademy.org/ils/netadmin/docs/software/squid/

I can't recall if WCCP provides that functionality, but if your router supports WCCP then you might wanna check squid+WCCP (ask google).
 
 
 
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