Hi All, Using kernel 2.6.22.1 and 2.6.23.9 on Debian etch I have troubles (probably) with delayed ACKs. The problem occures when using some software which keeps a TCP connection open for a long period of time. (eg.: ssh, nut) The problem occures after a longer time (about 10 minutes or so), and the symptom is that I don't get the ACK after 200ms. Well I don't get any packet from the server process during this 200ms. Then comes a retransmission of the request, which is then ACKed, but not answered, and no further requests are being answered, just ACKed on that TCP connection. It's a bit strange because both ssh and nut (Network UPS Tools) should imediately answer. The other thing which I've noticed is that while this TCP connection is 'dead', I just see the ACKs in the packet count of that connection in the conntrack table, but not the request packets. I'm sure that this is not a firewall config failure, because it occures on the loopback interface too. Can anyone help me to solve this? Thanx in advance: Steve Szijj - To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html