sv_minPing — set minimum required client ping
sv_minPing [ping]
sv_minPing
sets the minimum ping in milliseconds required for client connectivity, checked at time of connecting.
At connecting time the client ping is usually significantly worse than at normal gameplay,
therefore this setting might need to be inflated to compensate.
The server enforces this limit by rejecting client connections with a lower ping.
A value of 0 disables this functionality.
This feature is probably only useful for dial-up and other high-latency/low-bandiwdth connections.