Re: Amanda problem with Advanced Routing

an SWE sync points to tcp_ecn turned on on the initiating system, which
might not be liked by intermediate firewalls (or even simple routers)

try
  echo 0 >/proc/sys/net/ipv4/tcp_ecn

and see if that helps. It has solved many weird cases (non-amanda though)for me..


regards

--On Tuesday, June 22, 2004 04:38:45 PM +0200 Paul Bijnens<paul.bijnens AT xplanation DOT com> wrote:

Armando Taffarel Neto wrote:

I have a problem with my server and clients. I use Linux 2.4 and
2.6. Some clients I need use "advanced routing" for iproute2. When this
options is compiled in kernel and in use, the dump doesn't work, but
amcheck works perfectly... looks like the connection not establish. We
use vlan in many clients, but only the clients that uses iproute2
presents this problem.

Look the traffic:


Who is the server?  Who is the client?
Is this all traffic?  Where is the initial udp traffic to port 10080?
Are there debug files in /tmp/amanda/amandad.XXX.debug? If yes, mail
them too.


20:25:46.368150 192.168.0.62.48969 > 192.168.0.7.42127: SWE ...
20:25:46.368231 192.168.0.7.42127 > 192.168.0.62.48969: S   ... ack
20:25:49.367827 192.168.0.62.48969 > 192.168.0.7.42127: SWE ...
20:25:49.367853 192.168.0.7.42127 > 192.168.0.62.48969: S   ... ack
20:25:49.566010 192.168.0.7.42127 > 192.168.0.62.48969: S   ... ack
20:25:55.368978 192.168.0.62.48969 > 192.168.0.7.42127: SWE ...
20:25:55.369014 192.168.0.7.42127 > 192.168.0.62.48969: S   ... ack
20:25:55.566012 192.168.0.7.42127 > 192.168.0.62.48969: S   ... ack
20:26:07.371270 192.168.0.62.48969 > 192.168.0.7.42127: SWE ...


The computer 192.168.0.62 never sends an acknowledge.
You'll have to find out why.

My amanda report says me:

host   /var/named lev 0 FAILED 20040622[could not connect to host]


It seems be a bug, am I correct?


A bug in the iproute2 configuration maybe?



--
Paul Bijnens, Xplanation                            Tel  +32 16 397.511
Technologielaan 21 bus 2, B-3001 Leuven, BELGIUM    Fax  +32 16 397.512
http://www.xplanation.com/          email:  Paul.Bijnens AT xplanation DOT com
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