We hope there is a solution to being able to modify the network without rebooting the entire server. We have read that you can directly modify the /etc/network/interfaces file and you dont have to reboot but this has not worked for us. We need to two things. One to be able to add a bridge without restarting and two to be able to add nat forwarding rules to a bridge without rebooting. I have changed the file above but Proxmox is still telling me to reboot when viewing the network tab in proxmox. --- /etc/network/interfaces 2016-09-22 21:31:26.425698412 +0200 +++ /etc/network/interfaces.new 2016-09-25 14:27:42.772806681 +0200 @@ -30,7 +30,6 @@ post-up iptables -t nat -A PREROUTING -i vmbr0 -p tcp --dport 22222 -j DNAT --to 192.168.0.10:22 post-down iptables -t nat -D PREROUTING -i vmbr0 -p tcp --dport 22222 -j DNAT --to 192.168.0.10:22 Can any one provide their solution to activate network changes without rebooting the server.