s�n, 2002-04-14 kl. 12:02 skrev Antony Stone:

> > My question is: What are ports 2 & 3 on the FTP server for? Why would
> > PureFTPD want to use ports 2 & 3? They're not listed in /etc/services

> /etc/services lists destination ports, not source ports.

> A machine can use whatever source port it likes for contacting a server - 
> it's the destination port number which determines what the service is.

The point was supposed to be, that ports 2 & 3 are not "well known"
ports, and what are they being used for here?

> I'll agree, using source ports 2 and 3 seems pretty odd to me, but there's no 
> reason why sunsite.dk can't use them if it wants to....

I suppose I could have asked the question more specifically:

A more logical (paranoid) approach from my side, would be to open up tcp
from ports 2 & 3 for just this server. Especially because that's my main
FTP download server. Then I wouldn't have to open up high ports on a
blanket basis. Especially because I don't have them open for any other
of a myriad of services.

So, are there many FTP servers who demand that ports 2 & 3 are open for
FTP LS?

Tony

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Tony Earnshaw

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