Take the 2-minute tour ×
Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

Similar to this old request on BugZilla for Fedora 8, I'm hoping something has changed since then or someone knows another way.

I want to manage the iptables rules by hand—the one-size-fits-all automatic rules don't suit me at all. These rules seem to be added and removed when a network is started and destroyed. Is there a way of either preventing these rules being added at all or hooking a script into the network start that restores the default rules afterwards.

For now, I'm using a very crude method with cron, but I hope there is a better way:

  *  *  *  *  * root    iptables-restore < /etc/sysconfig/iptables
share|improve this question
    
Is KVM using a modular script to start virtual network devices? If so you could manipulate that script (this is how I would do this on XEN). –  Nils Dec 10 '12 at 14:56
    
I don't think so but tbh I'm not sure how to find out. –  Jack Douglas Dec 10 '12 at 17:38
    
The best place to ask is the libvirt devel list or on their IRC channel (#virt on OFTC) –  dyasny Dec 10 '12 at 21:52

1 Answer 1

Well I've found an answer that suits me: I've gone back to school and learned to do it the old fashioned way. No need to use libvirt's fancy networking functions as I can just:

  • set up my own bridged network(s) (not attached to any physical network port)
  • use a DHCP server on the host and masquerade in iptables
  • edit the libvirt guest config files to use the bridge(s)
  • have complete flexibility in how I want to configure security with iptables
share|improve this answer
    
+1 just use bridged mode, or move on to 802.1Qbg/h –  dyasny Dec 10 '12 at 21:53

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.