I have a xen machine that has iptables turned off, and after a reboot it started behaving badly during times when network IO rose to anything other than almost nil. Since I know iptables makes xen unstable without some additional config and since its isolated I just have is disabled. As a result it was the last place I looked and spent the better half of the day chasing my tail.
Somehow it gets turned on after a reboot, how can I deduce what is activating it?
Thanks! jlc