[Sw33T3R]

I added your fixes, problem still exist

'srcds_run -game csgo -usercon -nobots -secure -nowatchdog -strictportbind -ip 185.49.15.78 -port 27020 +sv_setsteamaccount ABDXXXXXXXXXXXXXXXXXXXX -tickrate 64 +map de_dust2 +servercfgfile server.cfg -maxplayers_override 25 +mapgroup mg_active +game_mode 0 +game_type 0'

Logging into Steam gameserver account with logon token 'ABD81FB7xxxxxxxxxxxxxxxxxxxxxxxx'
status
hostname: Counter-Strike: Global Offensive
version : 1.35.4.2/13542 350/6444 insecure (secure mode enabled, disconnected from Steam3) [INVALID_STEAMID]
udp/ip  : 185.49.15.78:27020
os      :  Linux
type    :  community dedicated
map     : de_dust2
players : 0 humans, 0 bots (25/0 max) (hibernating)

# userid name uniqueid connected ping loss state rate adr
#end
Could not establish connection to Steam servers.

[8guawong]

banned token?

[Sw33T3R]

Originally Posted by 8guawong banned token?

I think no, ill generate new token..

EDIT:
Logging into Steam gameserver account with logon token 'CE560BDBxxxxxxxxxxxxxxxxxxxxxxxx'
Could not establish connection to Steam servers.

[8guawong]

did you generate one with differnet steam account?

[Sw33T3R]

Originally Posted by 8guawong did you generate one with differnet steam account?

Yes

[Sw33T3R]

Originally Posted by 8guawong did you generate one with differnet steam account?

BTW ill try use these tokens on localhost (windows)

[Sw33T3R]

On localhost all works without problems, so this is not token issue

[Sw33T3R]

I switched serwer OS to Ubuntu 16.04 LTS
Problem still exist :/

[Sw33T3R]

Solved, Firewall issue

[Puppetmaster]

Originally Posted by Sw33T3R Solved, Firewall issue

Its always something like that ;)
Try using nmap from the outside to see if the ports are open.

For example:
nmap -sS -sU -PN -p 27000-27050 xxx.xxx.xxx.xxx