Hi Folks, Kindly share the exact reason for below wireshark Errors.
asked 03 May '16, 13:28  jimmy2016 |
One Answer:
The reasons why a "Malformed Packet" error occurs are either
The answer could be different for those four examples; we would have to see the actual network traces to see, for each of them, what the reason is. answered 03 May '16, 13:46  Guy Harris ♦♦ |
This cannot be answered without the respective capture files, as there may be many different reasons.
In general, any frame (or part of it) is marked as malformed if the dissector finds data in it which do not match the grammar the dissector uses to dissect the frame. So data may be missing due to packet truncation, or there may be some protocol extension unknown to the dissector, or the actual protocol may be a different one than the dissector expects - e.g. as soon as an SDP re-negotiation changes the codec from G.729 to T.38, Wireshark starts applying a T.38 dissector to any UDP packet to/from the media sockets of the session, but in fact the change may not have happened that quickly, so still a couple of G.729 packets follow the SDP re-negotiation before real udptl/t38 packets occur.
And, of course, there may also be a bug in the dissector code.
Thanks Buddy !
Could you also please help me find out the reason for Warning 1. "TCP: ACKed segment that wasn't captured (common at capture start)"
2. HTTP: Unencrypted HTTP protocol detected over encrypted port, could indicate a dangerous misconfiguration"