On Fri, 5 Apr 2002, Guido Fraietta @ Envisat wrote:

> Dear all,
> 
> I am now using the CheckPoint Firewall Software VPN-1 & FireWall-1
> Version 4.1 and I have to enable RPC (Remote Procedure Call) services
> among two machine through the firewall, because I use NIS services. I

Passing authentication mechanisms through a firewall is generally a bad 
thing.  You're much better off keeping external machines in their own 
authentication realm and not having users share credentials between an 
external and internal trust zones.  NIS and NIS+ are particularly "bad" 
protocols to let through a firewall (in general and also due to their 
reliance on RPC- let's not ignore the long history of RPC-based worms and 
the dangers of letting internal and external machines talk RPC.)

You might want to read:

http://lists.gnac.net/pipermail/firewalls/2001-December/086870.html
http://lists.gnac.net/pipermail/firewalls/2001-December/086807.html

Paul
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Paul D. Robertson      "My statements in this message are personal opinions
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