Wireshark-users: [Wireshark-users] isakmp packet on port 8500
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From: Perry Smith <pedzsan@xxxxxxxxx>
Date: Thu, 8 May 2014 18:16:00 -0500
Hi,

AIX sends its isakmp packet on port 8500 instead of 500.  Well... it sorta does both.

In any case, if the packet is on port 500, wireshark marks the protocol as isakmp and decodes the payload.  If the packet is on port 8500, then the ethernet, IP, and UDP parts are decoded but not the isakmp part.  Is that because of the port number or is it because the packet is not really properly formatted?  I can't find a user config option that is set to 500.

I found this:

> # Set the port for IPSEC/ISAKMP messagesIf other than the default of 10000)
> # A decimal number
> # tcpencap.tcp.port: 10000

but when I set that to 8500, it doesn't make a difference that I can see.

I'm fighting two unknowns.  Are my isakmp packets bad and that is why wireshark is not formatting them or is it because they are on port 8500 instead of 500?

Thank you,
Perry Smith

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