cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Announcements

153
Views
0
Helpful
2
Replies
Highlighted
Beginner

NAT troubleshooting

I've got a 2911 router connected to Verizon FiOS. I know about the "show ip nat trans" command to see what IPs i'm talking to on the outside. BUT: is there any Cisco-equiv command of the DOS "netstat" command? I want to be able to see the TCP port-numbers that are in use, in talking to the outside world. It would also be nice to know if the connection is established, or sitting at SYN_SENT state. I do appreciate that I might NOT be able to see this info, since the router is not terminating & re-originating any TCP traffic; it's just performing NAT. I'm just interested in the TCP nitty-gritty of what the router is doing. If the connection is not established, it won't show up under "show ip nat trans". That's what I'm interested in troubleshooting.

Why? My daughter's cellphone is trying to play an online game. It works fine on 4G data, but not at all on FiOS via WiFi. NOTE: Phone works fine, connects to everything under the sun just fine, except for this one game. Differences between the 4G method, and FiOS method: different originating IP, and different DNS, and obvious different network path thru the Internet.

 

 

 

 

 

 

2 REPLIES 2
Highlighted
VIP Mentor

Re: NAT troubleshooting

Hello,

 

there used to be the command:

 

show ip sockets

 

Not sure if that is still around...

Highlighted
VIP Mentor

Re: NAT troubleshooting

Hello
Have you tried playing that game via another devcie on the same wifi connection or even on a wried connection through the same network? -  I assume this wifi is through your home broadband internet connection and router?



kind regards
Paul

Please rate and mark posts accordingly if you have found any of the information provided useful.
It will hopefully assist others with similar issues in the future