RE: Publishing multiple SMTP servers on ISA 2004

  • From: "Thomas W Shinder" <tshinder@xxxxxxxxxxx>
  • To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
  • Date: Wed, 6 Oct 2004 01:45:35 -0500

Hi Arun,
 
If you put your current packet filter firewall on eBay, you can afford
to put a second NIC in the ISA firewall and get better protection, isn't
that what you paid for?
 
Anyhow, make sure the clients are Web Proxy clients if you want them to
authenticate to the ISA firewall. Make sure that ISA firewall is in the
path, because you never know when Thor is going to tunnel a probe
through your packet filter firewall :)
 
HTH,
Tom
www.isaserver.org/shinder <http://www.isaserver.org/shinder> 
Get the book!
Tom and Deb Shinder's Configuring ISA Server 2004
http://tinyurl.com/3xqb7 <http://tinyurl.com/3xqb7> 
MVP -- ISA Firewalls

 

________________________________

From: Kakadasam, Arunkumar [mailto:Arunkumar.Kakadasam@xxxxxxxxxxxxx] 
Sent: Wednesday, October 06, 2004 12:48 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: Publishing multiple SMTP servers on ISA 2004


http://www.ISAserver.org

Hi all
 
My ISA server is installed on a Win2000 Advanced server, which logs on
to our corporate domain.
The ISA Server is currently working only on the caching mode. Web
Filtering and access control are taken care of, by Websense and
Firewalls.
In the current setup, the ISA proxy sessions show users as only
"Anonymous". However, the IP address is available.
But is there a way by which I can see the actual users (Assuming that
all users log on to the same domain controller that the ISA server is
logging on to). I remember to have seen the authentication options where
the users are asked for logon name, password and domain, when they try
connecting, but the internal users might not like doing this..
 
Please suggest
 
Arun

________________________________

From: Rob Moore [mailto:RMoore@xxxxxxxx] 
Sent: Wednesday, October 06, 2004 1:26 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: Publishing multiple SMTP servers on ISA 2004


http://www.ISAserver.org

We got onto some blacklists a few months back. At least some of them, I
seem to recall, listed us by IP address.
 
Also, some servers do a reverse lookup on your mail, and if the reverse
lookup is wrong, they block your mail. So if we have two SMTP servers
sharing the same IP address, that'll cause trouble, too.
 
R.

________________________________

From: Troy Radtke [mailto:TRadtke@xxxxxxxxxxxx] 
Sent: Tuesday, October 05, 2004 3:49 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: Publishing multiple SMTP servers on ISA 2004


http://www.ISAserver.org

Depends on what happens.  If they ban mail.blahblahblah.com vs.
4.123.123.123 makes a big difference.  Never run a mail server myself,
and personally I'd think that they'd ban by name, not by IP.  So if each
has it's own A record, then life should be good.... or I could be way
off... =?)

        -----Original Message-----
        From: Rob Moore [mailto:RMoore@xxxxxxxx] 
        Sent: Tuesday, October 05, 2004 2:40 PM
        To: [ISAserver.org Discussion List]
        Subject: [isalist] Publishing multiple SMTP servers on ISA 2004
        
        
        http://www.ISAserver.org
        

        I'm getting ready to publish a couple of SMTP servers on one ISA
2004 firewall. One is a listserv and one is Exchange. Each is run by a
different admin and each admin is concerned about the other server
interfering with his box. The main concern is spam. Specifically, if our
listserver gets flagged as a source of spam (it shouldn't, as we only
intend to use it for lists of voluntary subscribers, but you know how
these things go), will that flag affect our Exchange server? To be more
specific, will the mail from each server appear to come from the same
address, or will it come from different external addresses? (Each SMTP
server will be published on a different external IP address. On an older
firewall that we have, SMTP traffic would appear to come from the IP
address the server receives mail on.)

        Thanks, 
        Rob 
        -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= 
        Rob Moore 
        Network Manager 
        American Friends Service Committee 
        1501 Cherry St. 
        Philadelphia, PA  19102 
        RMoore@xxxxxxxx 
        Phone: 215-241-7870 
        Fax: 215-241-7204 

        Our greatest glory is not in never failing but in rising every
time we fall. 
                               --Confucius 

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