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New Member

Duplicate IP problems

I have a cisco 806 router. Im trying to set up a streaming server. I have added the following line to the NAT table "ip nat inside source static tcp 80 80" the 172 number being the internal IP address of the local machine and the 203... number being the external..

when I try to connect to the external address from inside the local loop a duplicate IP error is raised. However if I try to connect to the same IP from outside the local loop it works fine. Any ideas??

Cisco Employee

Re: Duplicate IP problems

The nat static entry you have is for the translation from "outside to inside" not from "inside to outside". It will forward all the tcp port 80 request on ip to inside web server So thats the reason it works for you when you tried it from outside.. But to try from inside, you need to try to inside ip address which is on port 80...Thx..Tejal