[Xen-users] troubles with networking on a Xen machine

[Mayer <chef@xxxxxxxxxxxxxxx>]

Hello,

we setup a Xen server (Version 3.0.1) with four domains:
router (iptables routing to the outside world) 192.168.100.251(intbr) 
192.168.99.2 (extbr) 192.168.101.1 (dmzbr)
netserver (DHCP, DNS, NIS, TFTP) 192.168.100.252
fileserver (NFS, Samba) 192.168.100.253
dmzserver (apache) 192.168.101.2

and three bridges:
intbr (connected to router fileserver and netserver and to the internal 
(save) network eth1)
extbr (connected to router and the unsave external network eth0)
dmzbr (connected to router and dmzserver)

Now we encountered the following problem: it is not possible to access a 
TCP/UDP service from one domain to another. From another machine, it is 
possible to access for example DNS. From domain0 it ist not possible to 
access any service running inside a unpriviledged domain (tested with 
nslookup - 192.168.100.252). If we do the same from another computer ist 
works fine.
Pinging is always possible.
It is also not possible to access services inside upriviledged domains 
from unipriviledged domains. There are no firewalling rules which block 
that. The IP setup is correct, ping works.
We encoutered the error messages "ip_local_deliver: bad skb: PRE_ROUTING 
LOCAL_IN LOCAL_OUT POST_ROUTING" on the consoles of all domains.
Again: From a computer outside the access to the services running on the 
domains works fine.
Any hints?

Best regards
Florian Mayer, Mayer Electronics


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