Most likely, you guys have a problem like this:
http://www.telus.net/highspeed/BC/hs...h.html#fifteen
My friends and I have dynamic (DHCP) IP addresses. Are we able to ping each other so that we can play games?
Yes, although this depends on the IP addresses assigned by the DHCP server:
You will have no problems pinging each other if your new packages are assigned with different class C addresses by the DHCP server (e.g. 161.184.155.x and 161.185.156.x).
You will not be able to ping each other if your new packages are assigned with the same class C addresses by the DHCP server (e.g. both 161.184.156.x), although there is a work around. You must enter arp entries on your PCs:
Example: Customer A (161.184.156.140) wants to play games with Customer B (161.184.156.116)
At the DOS prompt each of you would type:
ping 161.184.156.1
- pings the gateway IP for this class C address
arp -a
- displays the MAC or physical address of the gateway
- e.g. aa-00-0x-00-e5-85)
arp -s (your friend's ip) (mac address of the gateway 161.184.156.1)
- e.g. arp -s 161.184.156.116 aa-00-0x-e5-85
Once you both enter the arp entries, you should be able to ping each other and play games.