[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: