IP Header Checksum Bad

[rdherric]

Hello --

I have code that sends an SNMP packet using the Socket.SendTo method.
When we sniff the packets using Ethereal, the UDP header checksum
appears to be all right, but the IP header checksum is 0x0000. This
results in my SNMP packets being rejected at the server.

Does anybody know anything about why this could be happening?

Thank you --
Robert

 

[Vadym Stetsyak]

Hello, (e-mail address removed)!

Do you use raw sockets?

You wrote on 2 Nov 2006 12:54:10 -0800:


r> I have code that sends an SNMP packet using the Socket.SendTo method.
r> When we sniff the packets using Ethereal, the UDP header checksum
r> appears to be all right, but the IP header checksum is 0x0000. This
r> results in my SNMP packets being rejected at the server.

r> Does anybody know anything about why this could be happening?

r> Thank you --
r> Robert

 

[rdherric]

Do you use raw sockets?

No, we're using the standard System.Net.Sockets.Socket object to
perform the communication.

Thanks --
Robert