So I've been trying for more than two weeks to run a L4D2 Dedicated Server.
However, no one but me can connect to it. I did port forwarding, enabled DMZ and allowed from port 26900 to 27050 on my firewall.
Now, this is an issue I've seen here and in AlliedModders' forums. Even I posted about it, and at some point managed to fix it by adding
sv_allow_lobby_connect_only 0 sm_cvar sv_hibernate_when_empty 0
to my server.cfg file, but then the issue came back out of nowhere and it appears I'm in Carrier-Grade NAT. I still wonder how I managed to bypass it.
Now to the main question, why is a local server hosted through the game joinable by others, but a dedicated server isn't, when in both cases CGNAT is present?
Also, another question: Is it possible to run SRCDS using OpenVPN? If so, how can I do this? Is there a guide for it?