> Is it possible to configure a firewall, so that all network
> applications (ftp, telnet, nfs, netbios) from any host on
> network A can access any server in network B, but access to
> servers on network A from network B is not allowed? (I've
> pretty much assumed that this is possible as it seems as if
> it would be a basic firewall feature. I'm looking for
> confirmation.)
Yes. All this, and a lot more besides.
> Any recommendations for documentation on firewalls for
> beginners? Is there a HOWTO?
Yes, there's a Firewall-HOWTO, and more info about this in the Net-3 HOWTO.
There's also an excellent web page on how to use it (don't have the URL
handy, but it's mentioned in the HOWTO).
These describe how to use "ipfwadm". This will soon be obseleted by
"IP-Chains" (and there's some good information about this somewhere on the
net too).
Cheers
Tony
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