Re: ICMP tcp port 80 unreachable [tos 0xc0]

Hello Henrik,

I reinstalled Red Hat 5.2, which comes with kernel 2.0.36 and Squid worked
fine. Then, I switched back to kernel 2.2.8 and those ICMP unreachable
messages came back.

Maybe there's something different at the 2.2.x Linux kernel.

But.. I ask myself.. hasn't anyone ever tried using transparent proxying
with Squid and a 2.2.x kernel before??

Thanks!

At 01:11 13/05/99 +0200, Henrik Nordstrom wrote:
>If these are true (and not an effect of the measurement) then it
>defenitely is a networking problem in the area of Linux transparent
>proxy support in the kernel or routing (both Linux and surrounding
>routers). Not really a Squid problem. Squid works at the application
>level, the kernel and routers works at packet level.
>
>I think it would be wise to get in touch with experts on Linux
>networking and transparent proxy kernel support to get an explanation
>from where these ICMP messages are generated and why.
>
>--
>Henrik Nordstrom
>Spare time Squid hacker
>
>
>Henrique Pantarotto wrote:
>
>> 17:29:17.114694 200.231.199.10 > 200.246.104.30: icmp: 209.216.198.28
>> tcp port 80 unreachable [tos 0xc0]
>>
>> 200.231.199.10 is the Linux/Squid box. 200.246.104.0/24, 200.231.199.0/24
>> and 200.231.184.0/24 are my users.
>>
>> Perhaps this forwarding thing doesn't work well with Kernel 2.2.x? Or
>> perhaps other kernel options must be compiled with it.
>>
>> Can someone help? Should I bug the people from the linux-net mailing-list
>too?

Henrique Pantarotto
Coord. Técnico Operacional
CEPAnet Internet Provider
Web: http://www.cepa.com.br
Tel. suporte: +55 (011) 5506-8477
Sao Paulo - Brasil
Linux Friend
Received on Thu May 13 1999 - 17:14:32 MDT