What should my private i.p. be?

[RD-G2]

I've set up virtual servers for TCP and UDP for port 2800-28030
but I'm confused to what I should put as my private i.p.

I have comcast so my DNS is dynamic. How do I make it static?

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[Starcraftman]

The private IP address that you are forwarding to must be your computers ip. Click start->Run->cmd-> ipconfig->enter

[RD-G2]

Wireless LAN adapter WIFI:

   Connection-specific DNS Suffix  . :
   Link-local IPv6 Address . . . . . : fe80::5da4:6e
   IPv4 Address. . . . . . . . . . . : 192.168.2.221
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 192.168.2.1

That would be, 192.168.2.221?

I changed it to 221 it was originally all automatic.

[RD-G2]

I forwarded my ports to .221
and set it up correctly, but I only got one person in the server, and that was it..
I installed BL on another pc and tried to connect but the server was dead when it was alive. =/

[RD-G2]

[fixed] Comcast finally help me out.