Hello I have static ip but when I try to add my server to masterserver I got this error:
[Fri Dec 7 15:23:47 2018]: Verifying 188.8.131.52:27015 (184.108.40.206:27015)
[Fri Dec 7 15:23:49 2018]: Verify of 220.127.116.11:27015 (hl2) failed (no key)
[Fri Dec 7 15:23:51 2018]: Timeout. Did not receive reply from server.
Choose correct gametype from the menu. Also check your firewall settings. Make sure your friends can join the server before submitting.
My server it's online all time and my friends can connect I also added on other websites so it's work..