kvm briding and ubuntu

[Jimmy Stewpot]

Hello,

I have a working environment where I have the following configuration. eth0 is in the bridge br0. I then have a KVM virtual machine running perfectly. I now want to configure the host server (With br0) to have a set of iptables rules. Unfortunately every time I add any rules to the interface br0/eth0 i loose all connectivity despite having a permit/any/any rule for port 22. Can anyone provide any insight into why that would be the case?

Regards,

Jimmy.