We are setting up the following:
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Internet
|
+----------+
| Router | IP/Port Filtering
+----------+
|
(a) |
+-------------+ DNS Server
| Firewall | Mail Relayer
| Workstation |
+-------------+
(b) |
|
+------------------+----------------+---------+------+
| | | | |
+------------+ +-----------+ +------------+ | Mac/PC
| Quickmail | | Unix Mail | | CC-mail | | Clients
| Server(Mac)| | Server | | Server(PC) | |
+------------+ +-----------+ +------------+ |
Unix
Clients
NOTE: (a) is a registered class C net, and (b) is an internal
unregister class B. Internal systems are managed by NIS
(the firewall is NOT an NIS client or server).
=======================================================================
I have two questions about this setup.
(1) Must I have an internal DNS server in order to have the firewall
function as a mail relayer to all three internal mail servers,
or will a properly configured sendmail.cf on the firewall suffice?
Does the Registered to Unregistered addresses pose a problem?
(2a) I have read some articles describing iftp and itelnet. These appear to
allow a user to ftp or telnet out to the Internet without having to have an
account on the firewall. A telnet or ftp session is started by the firewall
on behalf of the requesting user. Is there something similar (or the same) for
the Macintosh and IBM compatible PC's?
(2b) How can I run Mosaic from Unix, Mac and PC's transparently (as in 2a) to the
user without having to provide an account on the firewall. Will the same
mechanism from 2a provide this capability?
Thanks for any help you may be able to provide. :-)
===============================================================
S.D.Eason, Engineer | "And whatsoever ye do, do it
E-Systems, ECI Division | heartily, as to the Lord, and
1501 72nd Street North | and not unto men..."
St. Pete, Florida 33710 | Colossians 3:23
---------------------------------------------------------------
E-mail : sdeb @
eci-esyst .
com | Phone : (813)381-2000 X2124
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