Troubleshooting Slowness with Traffic, Management

L1 Bithead

Troubleshooting Slowness with Traffic, Management



I am reconfiguring my PA-100 VM, as i am changing the network design, but after i changed the interfaces IP, Router configuraattion, NAT policy, and security policy. I cannot get to internet and in monitroing end reason is "aged-out"


From CLI i can ping and traceroute using the management and external interface as source, but i cannot use my internal interface to ping or traceroute.


Even i cannot ping the external interface using hte internal interface (after enabling management policy for the external interface)


I cannot even ping between the Mgmt Interface and the internal Interface and they are in the same network (default intrazone traffice rule active as well)


I would appreciate any direction in troubleshooting the issue.

L6 Presenter

Re: Troubleshooting Slowness with Traffic, Management

For TCP traffic "aged-out" could indicate not completed 3-way handshake.  Few things to confirm:


1) Can Palo access the internet over the External interface?

2) Make sure routing is correct

3) Remember, traffic generated by the firewall will not be a subject for policy inspection (unless you source the packet from the interface which is assigned to the security zone).

4) Post the detailed log view of any aged-out session (magnifying glass view)


L1 Bithead

Re: Troubleshooting Slowness with Traffic, Management

- Palo alto can access internet via external interface and management interface, but not the internal interface.

- I have only one static route for that goes to External Interface and the next hope is my modem ip address, metric is et to 10 and unicast is routing table.

- i am sourcing the traffice from the source zone, and


attached is the print screen from my details logsScreen Shot 2017-09-05 at 1.39.00 AM.png

L6 Presenter

Re: Troubleshooting Slowness with Traffic, Management

You natting your traffic to the, from the source ip Why? 

What is your external ip address? You have modem/router, right. Does it know how to get back to the networks behind the FW?

L1 Bithead

Re: Troubleshooting Slowness with Traffic, Management

computer ip is

internal interface for paloalto is

external ip is

modem ip is


from CLI: Ping using the external interface ip as source works

ping source host
PING ( from : 56(84) bytes of data.
64 bytes from ( icmp_seq=1 ttl=55 time=61.1 ms
64 bytes from ( icmp_seq=2 ttl=55 time=59.9 ms
64 bytes from ( icmp_seq=3 ttl=55 time=68.8 ms


but ping using internal ip doesn't work



L6 Presenter

Re: Troubleshooting Slowness with Traffic, Management

Ok, thanks. You need to configure your Palo to NAT all internal traffic to its External IP ( In case you don't want to do that, then please add a static route on your router/modem pointing to the Palo external ip address  ( on how to reach subnet.

L1 Bithead

Re: Troubleshooting Slowness with Traffic, Management

Thanks, this does make sense, i really missed it from the lots of changes i have been through. Thanks again.

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