Re: [LCtalk] Problems with TCP/IP Connectivity

[Eric Christensen]

Hey,

Cause maybe diagnosed.
It took me some time to setup my network and insert a sniffer.
I can provide the capture file on simple request.
Apparently my DLINK Wireless Router 624+ sends out some UDP frames for 
SSDP (Simple Service Discovery Protocol - used for UPnP on your network) 
on a regular basis. I don't know why but the second series is killing 
the TCP/IP stack of the Lanbox.

For reading the trace:
192.168.123.222 Lanbox
192.168.123.102 Workstation
192.168.123.254 Wireless Router
192.168.123.103 Ethereal Station
192.168.123.242 Slimserver

The capture file contains the frames captured from a moment the box was 
not responding anymore, then I rebooted the box and you will see appear 
a ping and UDP frames broadcast (Frame 130 - first column - indicates 
the restart of the Lanbox; Frame 141 example of a UDP frame from the 
LanBox).
Frames 346 and following contain the first series of SSDP packets, which 
is survived (as can be seen from the following packets).
Frames 843 and following are the next series of SSDP packets and voila 
Lanbox no longer responds.

I have tried this multiple times to be sure and each time after the 
second series of SSDP packets the Lanbox stops responding.

I've looked into the configuration of my router whether I could disable 
this feature but didn't find any option.

Over to the developers?

Regards,
Eric Christensen