RE: MSN... stay away? or OK?

[Joe Matusiewicz <joem () nist gov>]

At 09:55 AM 10/19/00, Michael.Owen () net-tel co uk wrote:
> > Actually, it's just a teensy weensy more involved than that.  From
> > Microsoft's recommendation at:
> > http://www.microsoft.com/Windows/Netmeeting/Corp/ResKit/Chapter4/default
> > .asp
>
> Yes, but spreading such details just encourages people to try it. ;-)
>
> Though interestingly enough, you found
>
> "Pass through secondary TCP and UDP connections on dynamically
> assigned ports (1024-65535)."
>
> While this Microsoft article makes no mention of secondary TCP...
>
> http://support.microsoft.com/support/kb/articles/Q158/6/23.asp?LN=EN-US&SD=gn&FR=0
>
> I'm not entirely sure which one is right. Possibly the secondary TCP is 
> needed for the "Dynamic H.323 call control?"

I've played with NetMeeting and I've found with sniffing the line that it 
does use dynamic TCP ports.  Looking at my notes, for one session it 
started using TCP port 1030 and then incremented the port number as the 
session went on.  Kinda hard to nail it down.  But I guess it's OK if you 
block ports lower than 1024.  Yeah right.

-- Joe


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