RE: Trouble with server publishing rule and SMTP
- From: "Siegfried Weber" <sweber@xxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Sat, 31 Aug 2002 19:44:57 +0200
A quick follow up on this:
After deleting all SMTP server publishing rules and creating IP packet
filters things started to work. I don't know why it didn't work with a
server publishing rule but suspect I made a mistake in the configuration
of the SMTP server.
The SMTP Server is not configured to listen on all IPs (as opposed to
previously listen only on the internal ISA IP) and all external IPs are
configured via the IP packet filter to let traffic pass through.
However, now I am a happy camper and my DNS RBL script is kicking
SPAM'ers *ss :-))
<Cheers:Siegfried runat="server" />
> -----Original Message-----
> From: Siegfried Weber [mailto:sweber@xxxxxxxxxxx]
> Sent: Thursday, August 29, 2002 11:41 PM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] RE: Trouble with server publishing rule and SMTP
>
> http://www.ISAserver.org
>
>
> Phill,
>
> In the meantime I am thinking about uninstalling the ISA SMTP Filter.
> Although it is installed it is not running (filter disabled) but I'm
> getting into the mood that it might cause the problem.
>
> Also I might just have configured my Win2k SMTP Service wrong (I am a
> developer not admin, ya know). I'm going to double check the config
and
> take some snapshots so we can look it up sometimes later if necessary.
>
> Appreciated your time and help very much!
>
> <Cheers:Siegfried runat="server" />
>
> > -----Original Message-----
> > From: Phill Hardstaff [mailto:phillh@xxxxxxx]
> > Sent: Thursday, August 29, 2002 11:01 PM
> > To: [ISAserver.org Discussion List]
> > Subject: [isalist] RE: Trouble with server publishing rule and SMTP
> >
> > http://www.ISAserver.org
> >
> >
> >
> > Thanks for the info, I have been looking for something like this. I
> see
> > your problem better now and what you are saying of course makes
sense,
> do
> > everything in one place instead of the same thing in multiple
places.
> I
> > will run up something here with the config you have see what results
I
> > get, sounds like an interetsing way to do it.
> >
> > Cheers
> >
> > Phill
> >
> >
> > > -----Original Message-----
> > > From: Siegfried Weber [mailto:sweber@xxxxxxxxxxx]
> > > Sent: Thursday, 29 August 2002 10:05 PM
> > > To: [ISAserver.org Discussion List]
> > > Subject: [isalist] RE: Trouble with server publishing rule and
SMTP
> > >
> > >
> > > http://www.ISAserver.org
> > >
> > >
> > > Thanks for replying Phill,
> > >
> > > The intended result is to have one Win2k SMTP for all
> > > external IP's/SMTP
> > > domains that does all the hard work (prevent SPAM, filter on
> > > subject/attachment/sender address/sender domain, strip out read
> > > receipts, convert HTML mail to plain text etc.) before
> > > actually routing
> > > the mail to the final internal destination SMTP Server. That way
> only
> > > one machine is responsible for that stuff and all other SMTP
> > > servers are
> > > well hidden behind ISA and don't' need to worry about those
things.
> > >
> > > All the external IP's point via several server publishing rules to
> the
> > > same one and only internal Win2k SMTP Service which itself routes
> the
> > > mail to the final destination. This scenario does, as yours,
> > > work like a
> > > charm and the server publishing rules itself work without a
problem
> > > except the SMTP message header doesn't show the real SMTP
> > > host IP of the
> > > sending host (and I have verified with on least two other
> > > installations
> > > that it is supposed to show the correct IP but mine just doesn't).
> > > Without this information the DNS RBL software will fail because it
> > > cannot verify if the remote host who submitted the message is a
well
> > > known SPAM'er or not.
> > >
> > > All of that software pieces are custom Windows 2000/.NET SMTP
> > > Transport
> > > Event Sinks I have developed myself. The big plus of having
> > > Windows SMTP
> > > Event Sinks is that they run on any simple Win2k/.NET box and
> neither
> > > require ISA server nor Exchange server ;-)
> > >
> > > The first (free) version of the DNS RBL Transport Event Sink is
> > > available for download at
> > > http://www.cdolive.net/download/SMTPTransportEvent-RBLBlocking.zip
> but
> > > it does have some restrictions and is missing some features hence
I
> am
> > > working on v2 now when I discovered that it doesn't work on my
> config.
> > > The code is in VBScript and everybody can modify it themselves to
> fit
> > > their needs, BTW. You're just not allowed to republish or
> > > resell it ;-)
> > >
> > > A commercial DNS RBL which is way more powerful can be found at
> > > http://www.vamsoft.com (note: I am not working for that company -
> but
> > > tell them I recommended their product).
> > >
> > > <Cheers:Siegfried runat="server" />
> > >
> > >
> >
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