Saturday, July 3, 2021

Cisco ISR Open UDP Ports

Hi all,

Helping out a friend, I’m not to familiar with Cisco IOS-XE and have a question regarding open udp ports.

I’ve run a port scan and can see the following open|filtered ports for UDP. All tcp ports are closed or filtered.

https://i.imgur.com/OZr95Mc.jpg

There are no acls on the wan ingress. I can see NAT-pnp open though, didn’t think IOS supported this?

TIA



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