I'm looking at improving/checking my security on host nodes. Does anyone have info to share on a good IPtables setup for host nodes? My node setup: CentOS 6.6 x64 OpenVZ Virtualizor Nodewatch I'm not looking for help on basic hardening (I think I'm OK there). IPtables setup is initially done by virtualizor, but having issues with DNS (no access to external DNS). Can't find much via google. Was hoping to find some blog/tutorials out there. any tips on stress-testing / pen-testing a host node is welcome too, please.