missing packets (segment not captured, out-of-order, Dup Ack) when querying shared printer (Konica Minolta C454e) on printserver

edit

Hi WireShark

We are experiencing problems with Konica Minolta C454e shared Copiers freezing programs, when chosen in the print dialog on clients.

We have a lot of other brands and even Konica Minolta models where this is not a problem.

The client and server is separated as such:

Client <> ASA <> FortiGate Firewall <> ASA <> Windows Server 2022 Print server

Link to IMGUR album with two pictures

As you can see if you look at the IMGUR album:

• When successfully querying another Konica Minolta model on the same print server and the program doesn't freeze, you get a very small capture
• When querying the C454e on the print server you get a big capture with a lot of errors and dcerpc lines in it

As you can see there is a lot of DCERPC protocol connections and even more error entries with the following messages: [TCP Previous segment not captured], [TCP Out-Of-Order], [TCP Dup ACK] and a bit of [TCP Retransmission] and [TCP spurious Retransmission sprinkled in between.

Mostly [TCP Previous segment not captured] and [TCP Out-Of-Order] spread down throughout the entire capture.

I am a admittedly at a bit of a loss trying to decipher the capture and am hoping for someone more knowledgeable to lend me their wisdom.

Thank you