my router needs to forward our ext. ip 63.77.xxx.xxx port 21 to our ftp server 192.168.0.240 can anyone put that into a coded line for me? the tutorils page was anything but helpful... i also figured out how to SET dns entries, but i cant figure out how to set the default one, or remove the entries that i don't need.
The router is not going to tell the clients which DNS to use.
This happens only if the router itself is the DHCP server for the clients.
If the router is not a DHCP server, then the clients are obtaining their DNS from somewhere else (another server or manually)
Check the ipconfig on the machines.
Do they get a DNS statically or automatically?
What is the role of the router on this?
You said that you placed a NAT entry on the router that mess things up.
If you're not sure about the line you enter, do this:
sh run | i ip nat
The output will show the related NAT statements on the router.
You should be able to see the rule you entered that caused the problem and remove it by entering the same line with the word ''no'' in front.
ip nat inside source static tcp 192.168.0.240 21 63.77.xxx.xxx 21
The above command will make the router to forward TCP traffic received on IP 63.77.xxx.xxx on port 21 to IP 192.168.0.240 on port 21.
Is this what you need?