How exactly does RELATED work in Connection Tracking?

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Hi everyone.  Before I ask my question, I just want to alert everyone =
that I am newbie to Linux and the netfilter architecture.  OK, that =
being said, here's my question.  I'm trying to determine how exactly an =
incoming packet is determined to be RELATED to an existing connection in =
Connection Tracking.  For instance, how exactly does a TCP connection =
know that the packet is starting a new connection and this should be =
deemed RELATED?  What fields (for lack of a better word) are compared to =
come to this conclusion?  Thanks in advance.

-Matt

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<DIV><FONT face=3DArial size=3D2>Hi everyone.&nbsp; Before I ask my =
question, I just=20
want to alert everyone that I am&nbsp;newbie&nbsp;to Linux and the =
netfilter=20
architecture.&nbsp; OK, that being said, here's my question.&nbsp; I'm =
trying to=20
determine how exactly an incoming packet is determined to be RELATED to =
an=20
existing connection in Connection Tracking.&nbsp;&nbsp;For instance, how =
exactly=20
does a TCP connection know that the packet&nbsp;is&nbsp;starting a=20
new&nbsp;connection and this should be deemed RELATED?&nbsp; What fields =
(for=20
lack of a better word) are compared to come to this conclusion?&nbsp; =
Thanks in=20
advance.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>-Matt</FONT></DIV></BODY></HTML>

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