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pramod1Flag for United States of America

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printers, 802.1x,

i have installed several xerox printers in office on various floors  and they have 802.1x wireless authentication.

what is happening is the sessions are being kept open continuously  even users have finished printing.

we have citrix environment and sessions are basically being kept open from citrix server to print server

basically new copiers appear to stop communicating.  We resolve the issue by backing out the 802.1x config, reboot, and re-authenticate the copier.   We are seeing in the logs that all of the Citrix servers are continuously sending 80 and 443 traffic to all of the copiers.  We are also seeing a great deal of these connections remaining open.  we noted that on a normal day we see roughly 2000 open connections at any given time on our internal firewall.  today we saw over 9,000 open connections, and it was causing management performance issues.  I believe it’s possible that as these open connections accrue, the copier is basically DOS’d and stops communicating

even disabling  the 802 .1x is not helping in this, connections remain open


any idea what could be the cause.
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noci

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they are new pxerox MFP printers just installed a week back
Are you using WSD ports?
port 80 and 443 would suggest that.
If so, change them to standard TCP/iP ports, which will use port 9100.
WSD is a really bad port to use on a busy network, as WSDmon subscribes to the printer, whereas TCPmon polls about every 10 minutes.
And disable WSD on the printers, , (can probably be done via the web interface) or they will automatically pop up again as seperate printers.

https://www.urtech.ca/2013/09/solved-what-is-the-difference-between-a-tcpip-printer-port-and-a-wsd-printer-port/