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Maleformed Packet Snom 320

Hi


I am seeing this error when my Snom 320 is trying to registre.

It sends a Malformed Packet: WCCP.


Anyone know why that is?



txt
Malformed Pa...
(665 Bytes)
Best Answer

Dear Thomas,


I guess this is a NAT keepalive packet:

if you configure the NAT keepalive the phone periodically sends out a packet to the proxy in order to keep the firewall NAT session open.


Since this packet isn't a "real" SIP packet wireshark cannot dissect it and for this reason is marked as "malformed".

4 CommentsSorted by Oldest First

Hi Thomas, 

thanks for contacting us, this is a strange issue, I guess we need more data do investigate.


I'm converting this post to a ticket, so we can continue the discussion in private.


Thanks

Hi Pietro


I have attach the full wireshark packet.

Can you seen anything from that? Or what kind of information do you need?

USER AGENT : snom320/7.3.30
txt
Malformed Pa...
(2.68 KB)

Hi Pietro


I have attach the full wireshark packet. Can you seen anything from that?

Or what kind of informations do you need?


USER AGENT : snom320/7.3.30

txt
Malformed Pa...
(2.68 KB)
Answer

Dear Thomas,


I guess this is a NAT keepalive packet:

if you configure the NAT keepalive the phone periodically sends out a packet to the proxy in order to keep the firewall NAT session open.


Since this packet isn't a "real" SIP packet wireshark cannot dissect it and for this reason is marked as "malformed".

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