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iPrint Port Activity

Running NW6.5, SP5, latest iPrint client on WinXP Pro SP2. I have a
couple of workstations where, when I run a netstat -a, I get dozens of
TIME_WAIT entrys on port 631 and 3396 - just those two ports. I'm not
sure what to make of it, but I assume it has something to do with
iPrint. Thanks.
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3 Replies
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Tim,

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Absent Member.
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Tim,

Port 631 is iPrint and port 3396 is NDPS. You probably have both iPrint
and NDPS printers installed.
Now installed printers, when not being used, don't keep their
connection with the server open. Instead, every couple of minutes, they
just connect to the server to see the status and then disconnect again.
After the disconnection, the local TCP/IP protocol stack still keeps
the information of the past connection for some time. Those connections
will then be in TIME_WAIT status. SO all these TIME_WAIT connection in
netstat are actually connections that got recently closed.
All in all, there is nothing to worry about.

A more detailed description can also be found here:

http://www.port80software.com/200ok/archive/2004/12/07/205.aspx

--
Marcel Cox [SysOp]
http://support.novell.com/forums

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Absent Member.
Absent Member.

Normally, I agree - there is nothing to worry about. However, in this
instance, these particular HP printers cause some type of disruption
with iPrint and netstat -a shows hundreds of attempts on ports 631 and
3396. When we unload the HP exe's that handle the communication with
the printer, this port activity stops. In addition, if you don't have
any iPrint printers installed there is none of this port activity. The
utilization on the HP programs goes high and the excessive network
traffic also causes performance problems. I have done various test in
the form of uninstalling iPrint, HP software, etc., and it all point to
good old HP. These are 3052 laser printer, scanners with built-in jet
directs. Even if I disable the network portion on the printer, the
software still interferes with iPrint.

Marcel Cox wrote:
> Tim,
>
> Port 631 is iPrint and port 3396 is NDPS. You probably have both iPrint
> and NDPS printers installed.
> Now installed printers, when not being used, don't keep their
> connection with the server open. Instead, every couple of minutes, they
> just connect to the server to see the status and then disconnect again.
> After the disconnection, the local TCP/IP protocol stack still keeps
> the information of the past connection for some time. Those connections
> will then be in TIME_WAIT status. SO all these TIME_WAIT connection in
> netstat are actually connections that got recently closed.
> All in all, there is nothing to worry about.
>
> A more detailed description can also be found here:
>
> http://www.port80software.com/200ok/archive/2004/12/07/205.aspx
>

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