First time here? Check out the FAQ!
THIS IS A TEST INSTANCE. Feel free to ask and answer questions, but take care to avoid triggering too many notifications.
Ask Your Question
0

Not able to get data on tcp port==9100

  • retag add tags

Hi,

I am trying to capture the details of printer port 9100. But there is no details found in that. When we capture specific printer IP address. Problem is when we give the print command for Qty= 2000 labels for printing on printer .Its loss some labels to printing(Some time 800 or some times 500 labels was not able print).Printer is not hang when we check printer is stop for printing. Some times Its printed Qty=1200 .Some times printed 800 labels .So most of the time label is lost to print the labels. We are able to capture IP address but not able to capture the data on port 9100. we try to check which command is trigger on printer and why printer is not able to print all those labels. I am trying first time on Wireshark to capture the data s and may be i did mistake to config in Wireshark .

pravinpednekar's avatar
1
pravinpednekar
asked 2022-03-12 08:43:50 +0000
edit flag offensive 0 remove flag close merge delete

Comments

As mentioned in the answer and comments, it would help if you described your network in terms of the printer, what it's connected to (switch etc.) the host machine that's running Wireshark and what it's connected to and any other items in the network that may be relevant.

grahamb's avatar grahamb (2022-03-15 13:53:29 +0000) edit
more
  • delete
add a comment see more comments

1 Answer

0

If you're sure that the printer communicates over port 9100 and you don't see it in the capture (using promiscuous mode) then it is most likely the traffic did not pass the point in the network were you did the capture.

Take a look at https://wiki.wireshark.org/CaptureSet...

Since nowadays networks uses switches you'll need a tap or a (managed) switch in monitor mode to capture the traffic to/from this device.

And when the printer is using WIFI then take a look at this: https://wiki.wireshark.org/CaptureSet... , or use the monitor mode of the Access Point.

André's avatar
176
André
answered 2022-03-13 17:56:00 +0000
edit flag offensive 0 remove flag delete link
more

Comments

Is the printer wireless or wired? You can sniff the wired side if you have a TAP or switch that supports mirror ports. It is more complex to sniff the wireless.

BigFatCat's avatar BigFatCat (2022-03-14 19:42:12 +0000) edit
more
  • delete

Hi, Thanks for reply. we are sure that the printer communicates over port 9100.Its Barcode printers Printronix T8304 Model with Ethernet port. We keep the Wireshark in server to capture the data on port 9100.The trigger for printing from other system to the printer.

pravinpednekar's avatar pravinpednekar (2022-03-15 13:14:42 +0000) edit
more
  • delete

We keep the Wireshark in server to capture the data on port 9100.

Is that server used as a printer spooler?

The trigger for printing from other system to the printer.

So direct communication between the other system and the printer? Thus no traffic via the server you did the capture.

André's avatar André (2022-03-15 16:40:59 +0000) edit
more
  • delete
add a comment see more comments

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account. This space is reserved only for answers. If you would like to engage in a discussion, please instead post a comment under the question or an answer that you would like to discuss.

Add Answer