Re: connecting a socket to itself

[Stephen Hemminger]

On Fri, 18 Apr 2008 22:15:54 +0200
Bernd Eckenfels <ecki@xxxxxxxxxxxx> wrote:

> In article <OFEFA4A550.2A76AD8A-ON8825742F.00652C39-8825742F.00658BEA@xxxxxxxxxx> you wrote:
> > You don't have to listen to do a connect. Two programs (on different
> > machines or not) that are doing cross connects works, too.
> 
> Are we talking TCP here? I dont think this is the case SYN and SYN does not
> connect.
> 
> Gruss
> Bernd
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This is Simultaneous connection establishment as defined in RFC 793.
It is one of the under utilized design choices of TCP, that is also
viewed as a security problem by some.
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