I am running a dept has very limited outside connectivity to internet, has only one fixed ip(static, private, 10.10.101.50) from IT department, I was able to manage my department network to surf the internet by placing the router and set the given static ip as gateway interface to ethernet port of router. Someday later I do not have a connectivity anymore, and only one system was able to go out to internet by reconfiguring the router as follow
"ip nat inside source static 192.168.1.70 10.10.101.50"
Is there any way I can set up my department network to go to internet without have any extra IP with this cisco 2621 router. I can purchase other hardware if it is necessary like PIX.. I need your guys input in desperate.