Setting minimum port numbers for apps.

From: Thomas Leitner <tom_at_radar.tu-graz.ac.at>
Date: Tue, 09 Jan 2001 21:07:26 +0100 (MET)

Hi,

I'm currently configuring a firwall for our working group and I'm facing
one problem. Our FTP server is running Tru64 4.0E and for allowing PASV
FTP mode (which many Web browsers use) I need to open up a range of high
port numbers over 1024 in the firewall which the FTP server dynamically
uses. The problem is, though, that there are certain daemons like nfsd or
others which also use ports greater than 1024.

Under Solaris it is possible to dynamically set a minimum port number for
applications to be used. This helps in situations like these. You just
start all system processes, set the min. port number to say 10000 and
then start the FTP server which subsequently only uses PASV ports >=
10000. Now the firewall can be configure with this limit as well.

Question: Is there anything like a minimum port number for applications
under Tru64 as well?

Thanks // Tom

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Received on Tue Jan 09 2001 - 20:09:02 NZDT