Log--> Received a TCP packet with invalid MD5 digest

[allanc16]

Hello,

I am receiving the following log on a router, could it be a password mismatch between the peers?

SOCKET/6/SOCKET_TCP_MD5_INVALID: Received a TCP packet with invalid MD5 digest. Source: x.x.x.x:179, Destination: x.x.x.x:1129.

[Peter Paluch]

Hi Allan,

Definitively, this is a password mismatch between two BGP speakers, on of them being you and the other the one indicated in the logging message. Please double-check the password as specified in the neighbor X.X.X.X password password command in your BGP process, making sure it matches the reciprocally configured password on the remote BGP speaker.

BGP uses an atypical authentication where entire TCP segments are signed. No other IP-based routing protocol uses a similar approach, that is why these errors can be confusing - you don't see them often.

Best regards,
Peter

[allanc16]

Thank you Paluch i will work on it!