Re: What means "icmplog: destination unreable" ?
On Mon, 9 Apr 2001 11:41:55 +0200, Bernd Harmsen
<Bernd.Harmsen@OnlineHome.de> wrote:
>One of our Debian server is running the "Open Rock Telemetry Box" with
>NetSaint and Jail. Jail is reporting the following lines to the syslog,
>which I do not understand.
>
>------------------------------------------------
>18:02:05 inpu icmplog: destination unreachable from 195.179.172.30
>18:38:03 inpu icmplog: destination unreachable from 195.179.172.30
>18:02:05 inpu icmplog: destination unreachable from 195.179.172.30
>18:38:03 inpu icmplog: destination unreachable from 195.179.172.30
>------------------------------------------------
>
>As I understand 195.179.172.30 cannot reach some unknown destination.
>But we don't know 192.179.172.30 and we don't know the destination.
195.179.172.30 looks like a backbone router of ISION Internet in
Hamburg, as you could have found out yourself by doing a reverse DNS
lookup. That router is trying to tell you that a packet your machine
has sent out was not deliverable, most probably due to a routing
problem, a firewall rule or a host being down.
Logging packets like these is extremely uncommon. I would replace
icmplog with ippl, and configure ippl not to log unreachables.
This is very basic in operating an IP network. Are you sure that you
are correct on this list which supposedly is geared towards ISP
personnel?
Greetings
Marc
--
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Marc Haber | " Questions are the | Mailadresse im Header
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Nordisch by Nature | Lt. Worf, TNG "Rightful Heir" | Fax: *49 721 966 31 29
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