[Fwd: [Xen-users] XEN 3.0.4-1 / Iptables is not working properly]

[Maik Brauer <mailinglist@xxxxxxxxxxxxxxx>]

Hello,

I've still the problem. It must be possible that someone can help me, 
and have had the same problems.
So I set p the pure xen dom0 without anything else. And then I tried to 
configure the iptables.
Please find below my settings and explanation what isn't working.
Thanks.


Hello,

I've installed XEN3.0.4-1 and problems with the IPtables settings.
Please see below the firewall settings for Domain0:
Chain INPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     0    --  anywhere             anywhere
ACCEPT     tcp  --  anywhere             mbs-rootsrv         tcp dpt:ssh
ACCEPT     0    --  anywhere             anywhere            ctstate 
RELATED,ESTABLISHED
LOG        0    --  anywhere             anywhere            LOG level 
warning
DROP       0    --  anywhere             anywhere

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination


But then for example connection which are related to a server request 
(DNS requests / port53, etc) will be blocked by the firewall.
Here is an example of an request:
Apr 19 09:06:19 rootsrv kernel: IN=eth0 OUT= PHYSIN=peth0 PHYSOUT=vif0.0 
MAC=00:e4:3c:65:37:37:03:02:85:1a:e2:e0:08:00 SRC=213.133.99.99 
DST=88.198.xx.xx LEN=73 TOS=0x00 PREC=0x00 TTL=59 ID=0 DF PROTO=UDP 
SPT=53 DPT=32803 LEN=53
Apr 19 09:06:20 rootsrv kernel: IN=eth0 OUT= PHYSIN=peth0 PHYSOUT=vif0.0 
MAC=00:e4:3c:65:37:37:03:02:85:1a:e2:e0:08:00 SRC=26.104.239.90 
DST=88.198.xx.xx LEN=393 TOS=0x00 PREC=0x00 TTL=55 ID=44193 PROTO=UDP 
SPT=31178 DPT=1026 LEN=373
Apr 19 09:06:24 rootsrv kernel: IN=eth0 OUT= PHYSIN=peth0 PHYSOUT=vif0.0 
MAC=00:e4:3c:65:37:37:03:02:85:1a:e2:e0:08:00 SRC=213.133.98.98 
DST=88.198.xx.xx LEN=73 TOS=0x00 PREC=0x00 TTL=60 ID=0 DF PROTO=UDP 
SPT=53 DPT=32804 LEN=53
Apr 19 09:06:27 rootsrv kernel: IN=eth0 OUT= PHYSIN=peth0 PHYSOUT=vif0.0 
MAC=00:e4:3c:65:37:37:03:02:85:1a:e2:e0:08:00 SRC=213.133.100.100 
DST=88.198.xx.xx LEN=73 TOS=0x00 PREC=0x00 TTL=59 ID=0 DF PROTO=UDP 
SPT=53 DPT=32805 LEN=53
Apr 19 09:06:33 rootsrv kernel: IN=eth0 OUT= PHYSIN=peth0 PHYSOUT=vif0.0 
MAC=00:e4:3c:65:37:37:03:02:85:1a:e2:e0:08:00 SRC=213.133.99.99 
DST=88.198.xx.xx LEN=73 TOS=0x00 PREC=0x00 TTL=59 ID=0 DF PROTO=UDP 
SPT=53 DPT=32803 LEN=53
Apr 19 09:06:38 rootsrv kernel: IN=eth0 OUT= PHYSIN=peth0 PHYSOUT=vif0.0 
MAC=00:e4:3c:65:37:37:03:02:85:1a:e2:e0:08:00 SRC=213.133.98.98 
DST=88.198.xx.xx LEN=73 TOS=0x00 PREC=0x00 TTL=60 ID=0 DF PROTO=UDP 
SPT=53 DPT=32804 LEN=53

When I flush the Iptables or I will put in each request then everthing 
is working fine. But you never now which server will answer to a 
request, so it is
impossible to configure all ip-addresses. This should be done due to the 
line: -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
which is unfortunately not working.

What is the problem and the solution ?
Many Thanks.

Kind Regards,
Maik Brauer



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