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Sessions getting dropped in router?

bdoman2008
Level 1
Level 1

Hi,

Router is running with IOS 12.4(24T) and we are having problems like file download stalls, some emails not being send or received. CBAC is enabled on this router with default values. MTU is also the default value. This problem has started all of a sudden. seeing lot of errors in the logs as below:- Has anyone got similar kind of problem resolved?

Oct 27 16:47:52: %FW-6-DROP_PKT: Dropping smtp session X.X.X.X:4443 Y.Y.Y.Y:25  due to  Stray Segment with ip ident 25800 tcpflags 0x5014 seq.no 288975356 ack 3363647737
*Oct 27 16:48:31: %FW-6-DROP_PKT: Dropping http session X.X.X.X:2020 Y.Y.Y.Y:80  due to  Stray Segment with ip ident 1472 tcpflags 0x5011 seq.no 2686554796 ack 4275837539

Thank you.

1 Reply 1

paolo bevilacqua
Hall of Fame
Hall of Fame

Recommend that you eliminate CBAC, that does not add any security, but for sure is buggy and causes trouble.