Alteon : FIN/ACK don't close connection
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Posted by Lucho on November 15, 2006, 5:57 pm
Please log in for more thread options Sometimes sessions remain open on my Alteon. Timeout Alteon : 10min Timeout Server : 5min I've done a tcpdump on the client side and on the server : Client send a SYN Server respond with a SYN/ACK Client send a ACK The session is ESTABLISHED on the alteon and on the server. After this exchange nothing is sent by the 2 sides After the 5min : - the session table on the alteon is at 6 E - the server close the connection (timeout of the application like apache) a FIN/ACK is sent to the client. The client respond with a ACK. The connection goes in TIME_WAIT1 on the server ... But the alteon doesn't close the session and ... more it updates the session table by passing (againg) the aging time to 10min. The session remains opened on the alteon during at least : 5 min (timeout of the application on the server) + 10 min (timeout of a TCP session on the alteon). Do you know how the alteon could take the FIN/ACK (send by the server) as a closing TCP session sequence ? Thank | |||||||||||||
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Posted by Lucho on November 16, 2006, 5:17 pm
Please log in for more thread options There was an ACL with a permit ANY but nothing else in. I removed it on the port ... and it works ! Lucho a =E9crit : > as a closing TCP session sequence ?
>=20 > Thank | |||||||||||||
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>=20
> Sometimes sessions remain open on my Alteon.
> Timeout Alteon : 10min
> Timeout Server : 5min
>=20
> I've done a tcpdump on the client side and on the server :
> Client send a SYN
> Server respond with a SYN/ACK
> Client send a ACK
> The session is ESTABLISHED on the alteon and on the server.
>=20
> After this exchange nothing is sent by the 2 sides
>=20
> After the 5min :
> - the session table on the alteon is at 6 E
>=20
> - the server close the connection (timeout of the application like=20
> apache) a FIN/ACK is sent to the client.
> The client respond with a ACK.
> The connection goes in TIME_WAIT1 on the server ...
>=20
> But the alteon doesn't close the session and ... more it updates the=20
> session table by passing (againg) the aging time to 10min.
>=20
> The session remains opened on the alteon during at least : 5 min=20
> (timeout of the application on the server) + 10 min (timeout of a TCP=20
> session on the alteon).
>=20
> Do you know how the alteon could take the FIN/ACK (send by the server) =