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[REBOL] Re: timeout

From: athena:pop3-dfw:myfirstlink at: 10-Apr-2001 22:36

Not true. The ICMP port unreachable message relates to whether and application is accepting connections or not from the port. A TCP RST is sent when an non SYN message is received for a non-existent TCP connection on the receiving system. Two different situations in the TCP finite state machine. Refer to the TCP RFC for details. The initial SYN which is transmitted by this application says I want to make a new connection. The connection is not yet established and therefore the TCP RST can not possibly be sent. The TCP RST is only sent when a non-initial SYN has been sent but the receiveing system does not have an already open connection which should not occur in this situation. This usually occurs when a pre-existing connection tries to communicate with a system which for some reason has dropped the connection (application failure or system restart). Harold Grovesteen, CCNP Holger Kruse wrote: