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For example if you were trying to monitor some web traffic but your web proxy is on port 9191, how would you get Wireshark to treat port 9191 as HTTP (or as port 80)?
To change the protocol associated with a port:
![Wireshark Dnp3 Serial Wireshark Dnp3 Serial](/uploads/1/2/5/7/125731136/970500420.png)
![Wireshark Dnp3 Serial Wireshark Dnp3 Serial](/uploads/1/2/5/7/125731136/256938431.jpg)
On 21:42, Graeme Melia wrote: I am using Wireshark to to monitor a multi-serial port device that communicates to a server via IP. The outgoing TCP messages from the server has the DNP3 message embedded, usually in one packet.
- Open wireshark
- Go to Edit -> Preferences -> Protocols
- Search for your protocol and click it
- On the right hand side you should find a list of ports considered to be using the protocol
- To add your own port, simply add a comma “,” after the last port listed and enter your own
Simply restart Wireshark and restart your capture for the changed to take effect.
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