Networking - Using a Single Network Interface

Using OpenVPN: (Not using OpenVPN start below)

SSH to the controller (192.168.101.2) and do the following:

vim /etc/sysconfig/iptables

paste the following lines, substituting ens160 for the interface name if needed:

-A INPUT -i eth0 -p udp -m udp --dport 1194 -j ACCEPT
-A INPUT -i br0 -p udp -m udp --dport 1194 -j ACCEPT

:wq! to save your changes and quit

Next, run:

service iptables restart

Next, run:

cd /etc/openvpn && vim openvpn-startup

Add the following line at the bottom of the file:

route add default gw 192.168.101.1 (or other router/gateway address)

wq! to save your changes

Continue below

cd /etc/sysconfig/network-scripts && vim ifcfg-eth0

change GATEWAY= to 192.168.101.1 (or other router/gateway address)

change DEFROUTE= to yes

:wq! To save your changes

Next, run (you may need to substitute ens192 in the interface file name):

cd /etc/sysconfig/network-scripts && vim ifcfg-eth1

change DEFROUTE= to no

:wq! To save your changes

Next, disable the WAN interface in the GUI:

ifdown eth1

This will shut down the WAN interface.

Then, disable the WAN interface: Under Admin>System Settings>Network Interfaces, change Start on Boot to No

This last command is ONLY needed if using OpenVPN

NOTE: Running the following will terminate the current VPN connection (you will need to reconnect)

run:

systemctl restart openvpn@server.service