I have a Centos 7.3 virtual server at home running SABnzbd for usenet downloads.

I have setup openvpn on it, (as a client) so the usenet traffic goes through my VPN.

However, I also want to access the SABnzbd web gui from outside.

I can get this working when the VPN is disconnected, but it doesn't work when the VPN is up.

I am trying to connect directly to my ISP provided IP (via a dynamic dns address provided by Noip), and I can see the SYN packets coming in, but no SYN/ACKS are getting sent back out from my server.

I'm not even sure if this should work, if I should be connecting to the SAB web interface via the VPN endpoint, rather than the local endpoint, or if there is some sort of exotic config I have to do to get it to work.

Any pointers on where I'm going wrong are appreciated.

If I dig very deep into memory some remnants of this problem surface. It does not work over VPN. I think it has something to do with the subnet SABnzb is listening. Maybe you can set it in SABnzb. I used a workaround, because when I am remote, I can't access SABnzb to change the setting.

This is a workaround. Open an SSH connection to your SABnzb host over the VPN. Redirect to the SABnzb's local address. Connect to localhost in your web browser on the remote machine.

OK, in slow motion now.

10.0.0.4 <- SABnzb server VPN address
192.168.20.4 <- SABnzb server LAN address

10.0.0.5 <- your remote laptop VPN address
172.16.80.10 <- you remote laptop LAN address

So what you try is http to 10.0.0.4 SABnzb server. And it fails. You laptop is on the same subnet so it should work. But it doesn't.

Try this: On your remote laptop open a terminal and enter: This forwards port 1234 on localhost to port 8081 on 10.0.0.4 the SABnzb server. Leave the terminal open and leave the connection open. But you don't use it to enter commands.

Then you enter in your web browser on your remote laptop: When done with working in SABnzb, go back to the terminal and exit the SSH shell on the SABnzb server.

jlinnkels