[SRCDS] Server running in 3 ports

Hi, I have a VPS server. when I turn server 4fun:

./srcds_run -console -game cstrike +map surf_10x_reloaded_fixed +maxplayers 24 -timeout 30 -port 27017

This is comand line.

Server running in 3 ports 27017/27018/27019
How to fix? How to block running in other ports?