Hi.
> Also iptables -L for each machine as an afterthought - just for paranoia's > sake > Well, I started preparing all the information you requested, but when I got to this stage - I found out there were INDEED iptables running on 2 servers from 3. The strangest thing is that I don't recall enabling them at all. Perhaps some 3rd party software have enabled them? In any case, all seems to be working now. Thanks for everybody that helped - I will be sure to check iptables on all the cluster machines from now on :). Regards.