[Supa]

rcon "rcon_password" sv_players : find the player's index number
rcon "rcon_password" sv_ban [index number] [time] [time2] [time3] [time4]

You can specify a repeat time for players up to 4, the 5th time will be permanent. the format goes #s #m #h #d
the # represents a number between 1 and 9. If you use 0 it represents infinite and any times set afterward will be nulled.

for example
sv_ban 4 30s 30s2m 1h 3s55m3h4d

The first time this person gets banned would be for 30 seconds, then if he gets banned again it will be for 2 minutes and 3 seconds, the third time would be 1 hour, and the forth time would be 4 days, 3 hours, 55 minutes and 3 seconds.

Of course when temp banning someone in game you only need to specify 1 time. The others are useful in the init.txt file.