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

At 05:46 PM 5/11/99 -0300, Henrique Pantarotto wrote:
>Hello Squid friends!
>
>I've setup a transparent proxy with Squid2.2STABLE2 routing access from a
>Cisco router.
>
>It is working, but if I do a "tcpdump -n proto ICMP" at that Linux/Squid
>machine, I get many, many, many lines like this:
>
>17:29:15.094150 200.231.197.10 > 200.231.148.156: icmp: 200.240.10.51 tcp
>port 80 unreachable [tos 0xc0]

An ICMP message like that is send by devices which detect that this couldn't be
done or is blocked (by a filter). There is no cure and this is not a problem of
Squid (in fact it is not your fault at all). In fact when I traced to this IP
it stopped somewhere in Brazil but never reaches the destination.

[...]

>Is there a cure?? ;-)
>
>Thanks!
>
>
>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
>

---------------------------------------------------------------------
Marc van Selm
NATO C3 Agency
Communication Systems Division, A-Branch
Tel: +31 70 3142454
E-mail: marc.van.selm@nc3a.nato.int
---------------------------------------------------------------------
Private: selm@cistron.nl, selm@het.net, http://www.cistron.nl/~selm

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Received on Wed May 12 1999 - 01:32:00 MDT