There are 2 pages of google with the same problem, maybe try some: https://www.google.de/search?q=%22ER...n+requested%22

Quick skip for solutions over it was from "put net_ip in .cfg" to "reinstall game" lol

Also show your server.cfg

Also try allow all traffic: https://superuser.com/questions/6344...coming-traffic

Or start as root for a test