Amanda-Users

Re: amcheck fails

2003-11-07 04:46:41
Subject: Re: amcheck fails
From: Christoph Brunner <christoph.brunner AT internetx DOT de>
To: amanda-users AT amanda DOT org
Date: Fri, 7 Nov 2003 10:45:30 +0100
Am Donnerstag, 6. November 2003 17:31 schrieben Sie:
> On Thu, 6 Nov 2003 at 5:04pm, Christoph Brunner wrote
>
> > > Is there a firewall on this box?  What are the settings?  Are TCP
> > > wrappers getting in the way?  If you watch the traffic during the
> > > amcheck, what do you see?
> >
> > The firewall is already offline.
> >
> > Here is a tcpdump-listing during amcheck, but i do not really understand
> > the output, so please say, if you expected something different (i have
> > replaced the ips with names)
> > ==========================
> > tcpdump: listening on eth0
> > 16:41:58.661929 backup03m.658 > zulu.10080: udp 117 (DF)
> > 16:41:58.669527 zulu.10080 > backup03m.658: udp 50 (DF)
> > 16:41:58.670657 zulu.10080 > backup03m.658: udp 83 (DF)
> > 16:41:58.670757 backup03m.658 > zulu.10080: udp 50 (DF)
> > 16:41:58.682902 backup03m.658 > zulu.10080: udp 201 (DF)
> > 16:41:58.690293 zulu.10080 > backup03m.658: udp 50 (DF)
> > 16:41:58.725535 zulu.10080 > backup03m.658: udp 414 (DF)
> > 16:41:58.725615 backup03m.658 > zulu.10080: udp 50 (DF)
> >
> > backup03m is both the host amanda is running on and a backup client
> > (which does not work, amcheck says 'host down'), zulu is a backup client
> > that works.
>
> The first line says that backup03m sent a UDP packet from port 658 (a
> priviledged port) to port 10080 (the standard amanda listening port) on
> zulu.  zulu responds with a couple of of packets, and then they have some
> more conversation.
>
> Try again doing a tcpdump on the loopback device (lo on my box).  That's
> where traffic to the backup host itself will go.

Hi,

a tcpdump on the loopback device says:
=================================
tcpdump: listening on lo
10:40:45.589797 backup03m.1008 > backup03m.10080: udp 117 (DF)
10:40:55.482650 backup03m.1008 > backup03m.10080: udp 117 (DF)
10:41:05.482671 backup03m.1008 > backup03m.10080: udp 117 (DF)

6 packets received by filter
0 packets dropped by kernel
=================================

Shouldn't there be responds from port 10080 to 1008?

Nice greetings,
Christoph


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