For console and not see it, or know name.
Just type "cl_ the press tab and all Cl cvars is showed.
If you type cl_punk then press tab you will see it.
If your have patch 1.4, dont know if this work in prevoius patches but probobly yes.
If you have manage to get cl_punkbuster just press enter to see what´s it´s on?
Then just press arrow up, and cl_punkbuster will come again and add "1" after then press enter. or type manually.

Always start Rtcw in admin mode.
And in controlpanel "system security" in "windows firewall" and "manage a program access true firewall"
Look soo pnkBstrA and pnkbstrB have access on both private and global.
(using swedish Os), hope it help you anyway a bit!