cisco ip nat / port forwarding
6,511
You mixed up source and destination in Port forwarding.
ip nat inside source static udp interface FastEthernet0/0 9987 10.10.250.201 9987 extendable
ip nat inside source static tcp interface FastEthernet0/0 30033 10.10.250.201 30033 extendable
ip nat inside source static tcp interface FastEthernet0/0 10011 10.10.250.201 10011 extendable
ip nat inside source static tcp interface FastEthernet0/0 443 10.10.250.201 22 extendable
ip nat inside source static tcp interface FastEthernet0/0 80 10.10.250.201 80 extendable
Also use standard access list to allow only local networks to go through NAT.
ip access-list standard NAT
permit ip 10.10.250.0 0.0.0.255
Related videos on Youtube
Comments
-
h3rrmiller over 1 year
I have been trying to get port forwarding working with a newly installed cisco router. I cannot seem to find where my fault is and have been looking for quite a while.
The relevant section of my config:
interface FastEthernet0/0 ip address dhcp ip nat outside speed 100 full-duplex no cdp enable ! interface FastEthernet0/1 ip address 10.10.250.1 255.255.255.0 ip nat inside speed 100 full-duplex ! router eigrp 250 passive-interface FastEthernet0/0 network 10.10.250.0 0.0.0.255 no auto-summary ! ip nat inside source list NAT interface FastEthernet0/0 overload ip nat inside source static udp 10.10.250.201 9987 interface FastEthernet0/0 9987 ip nat inside source static tcp 10.10.250.201 30033 interface FastEthernet0/0 30033 ip nat inside source static tcp 10.10.250.201 10011 interface FastEthernet0/0 10011 ip nat inside source static tcp 10.10.250.201 22 interface FastEthernet0/0 443 ip nat inside source static tcp 10.10.250.201 80 interface FastEthernet0/0 80 no ip http server no ip http secure-server ip classless ip route 0.0.0.0 0.0.0.0 FastEthernet0/0 dhcp ! ! ! ip access-list extended NAT permit ip any any
There has to be an issue with my config somewhere? Or am I missing something necessary to get port forwarding working?
Here is the current NAT table stripped down to show only my rules:
cisco2621#show ip nat tran Pro Inside global Inside local Outside local Outside global udp x.x.x.x:9987 10.10.250.201:9987 --- --- tcp x.x.x.x:10011 10.10.250.201:10011 --- --- tcp x.x.x.x:80 10.10.250.201:80 --- --- tcp x.x.x.x:443 10.10.250.201:22 --- --- tcp x.x.x.x:30033 10.10.250.201:30033 --- ---
-
Admin about 11 yearsfrom another friend. "I think it may be the access list. You are trying to forward TCP and UDP Ports but only have IP in the access list."
-
sartis about 11 yearscan you add an output of
show ip nat translations
? -
h3rrmiller about 11 years@DukeLion Sorry for the delay, I was away. I updated the question to include the NAT table
-
Konrad Gajewski almost 9 yearsWhich router/IOS is it?
-