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Default Port Forwarding on the Cisco 800 Series


What is Port Forwarding?
What is Port Triggering?


#
# Telnet to Router and enter provided username and password
# Then follow these steps to setup port forwards
#

#
# To enter Admin Mode ( will require root password )
#

Type enable at the prompt

#
# To show currently configured Interfaces ( there could be several )
#

Type show ip interface at the prompt.

#
# To show Current Port Forwards on Router

Type show ip nat translations at the prompt.

#
# To Enter Configuation Mode
#

Type configure at the prompt.

#
# To add Port Forwarding rules modify then type the following commands at the prompt.
# Note: "BVI1" was the found interface name from running command "show ip interface"
#

ip nat inside source static (TCPorUDP) (YourCompsIP) (PortToForward) interface BVI1 (PortToForward)

#
# To forward port 3389 TCP to the computer that had the 172.16.2.60 ip address you would do the following.
#

ip nat inside source static tcp 172.16.2.60 3389 interface BVI1 3389

#
# End Configure Session
#

Press CTRL-Z

#
# Once you have entered the config, test it out and if it works,
# issue this command to make it persistent:
#

copy run start

#
# When it says
#
# Destination filename [startup-config]?
# just press enter.

Thanks goes out to

Aaron Saunders
Senior Software Developer
BodyShop Management Systems

for writing and submitting this guide!


To test if your port has been properly forwarded, you can use our Port Checker tool.