RE: Problem publishing port

From: "Jim Harrison" <Jim@xxxxxxxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Date: Sun, 31 Oct 2004 00:13:42 -0700
Unix vs. Windows SMTP is irrelevant.
The fact is, ALL SMTP servers send to TCP:25 unless specifically
configured to do otherwise.
They call it a "standard" and it's governed by a simple document called
an RFC.
Specifically, it's RFC 2821 (originally 821) and you'll find it here:
http://www.rfc-editor.org/rfc/rfc2821.txt 

If your mail server (Unix, Windows, CP/M, Commodore, etc.) listens on
TCP:26, you'll receive diddly, nada, bupkus, squat.

The good news is that you won't get much in the way of spam, either.

  Jim Harrison
  MCP(NT4, W2K), A+, Network+, PCG
  http://isaserver.org/Jim_Harrison/
  http://isatools.org
  Read the help / books / articles!
 
 

-----Original Message-----
From: Ara.A [mailto:ara@xxxxxxxxxx] 
Sent: Saturday, October 30, 2004 8:53 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: Problem publishing port

http://www.ISAserver.org

Hello
This might sound scary, but I think your best bet is to get a hosting
plan
based on UNIX to be cheap or highly configurable, then create those
accounts
on the plan and forward your mx record to them. Create a forwarding rule
in
UNIX SMTP that forwards any incoming mail to SMTP port 26 on your ip so
you
get a local copy of them and you should be fine just by answering since
your
outgoing SMTP is not blocked. It virtually goes to host mail server but
instantly is forwarded to your machine based on your own port settings,
but
of course most stuff become limited.
Good lock.




> -----Original Message-----
> From: Marvin Cummings [mailto:MarvinC@xxxxxxxxx]
> Sent: October 30, 2004 9:58 PM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] RE: Problem publishing port
> 
> http://www.ISAserver.org
> 
> No...No no no...
> My ISP is blocking port 25 and preventing me from sending and
> receiving email from my exchange server. So I'm trying to figure a way
> to get around this. I've managed it to get to where I can send mail
> but I can't get anything coming in. One option was to configure the
> exchange server to accept traffic on port 26, which I'v done by adding
> that port to the default smtp virtual server. I now need to open port
> 26 on the isa server and map it to the exchange server. I tried to do
> this by going to my published smtp rule and specifying it in the
> traffic port settings as follows:
> Publish on this port instead...: 26
> Send requests to the default...
> 
> This didn't seem to work. So I'm trynig to figure if I'm doing
> something wrong or something that's not possible in ISA?
> 
> thnks
> 
> On Sat, 30 Oct 2004 16:34:23 -0700, Jim Harrison <jim@xxxxxxxxxxxx>
wrote:
> > http://www.ISAserver.org
> >
> > Let me get this straight; your ISA is listening on TCP:26 to receive
> > mail from the Internet?
> > You'll never receive a single item this way, because all email
servers
> > send to TCP:25.
> > It's one of those neato things that makes email work.
> >
> >
> >
> >  Jim Harrison
> >  MCP(NT4, W2K), A+, Network+, PCG
> >  http://isaserver.org/Jim_Harrison/
> >  http://isatools.org
> >  Read the help / books / articles!
> >
> > -----Original Message-----
> > From: Marvin Cummings [mailto:MarvinC@xxxxxxxxx]
> > Sent: Saturday, October 30, 2004 1:57 PM
> > To: [ISAserver.org Discussion List]
> > Subject: [isalist] RE: Problem publishing port
> >
> > http://www.ISAserver.org
> >
> > Yes the Exchange server is a SNAT client and there is no error
> > appearing at the client as I can send mail fine. The problem is on
the
> > external side and getting the ISA server to receive the mail on a
> > different port and then publishing it to exchange on the specified
> > port.
> > I used gmail to try and send test mail to my published server. It
> > receives the mail delivery error.
> >
> > thanks
> >
> > On Sat, 30 Oct 2004 07:21:54 -0700, Jim Harrison <jim@xxxxxxxxxxxx>
> > wrote:
> > > http://www.ISAserver.org
> > >
> > > Is the Exch server a SecureNAT client?
> > > What is the error seen at the client?
> > > What is in the ISA logs for those requests?
> > > What are you using to test the connection with; mail client,
telnet,
> > > WinsockTool?
> > >
> > >  Jim Harrison
> > >  MCP(NT4, W2K), A+, Network+, PCG
> > >  http://isaserver.org/Jim_Harrison/
> > >  http://isatools.org
> > >  Read the help / books / articles!
> > >
> > > -----Original Message-----
> > > From: Marvin Cummings [mailto:MarvinC@xxxxxxxxx]
> > > Sent: Friday, October 29, 2004 4:43 PM
> > > To: [ISAserver.org Discussion List]
> > > Subject: [isalist] Problem publishing port
> > >
> > > http://www.ISAserver.org
> > >
> > > I'm having trouble configuring ISA to map port 26 to my Exchange
> > > server. What I've done is added port 26 to the exchange default
SMTP
> > > virtual server protocol and now want to configure the ISA server
to
> > > open port 26 and map it to this exchange server. This I'm oping
will
> > > allow inbound email.
> > > What I've done is
> > > navigate to the properties of my published exchange smtp rule
> > > clicked the traffic tab where SMTP server is selected
> > > clicked ports and selected the Send requests to this port on the
> > > published server: 26.
> > >
> > > I've tried to send messages in externally and waited but nothing
is
> > > coming thru. Could I be doing this wrong?
> > >
> > > Port routing 101...SOS and I'm not seeing strait right now so any
> > > responses are appreciated.
> > >
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> Network Security Library: http://www.secinf.net/
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------------------------------------------------------
Other Internet Software Marketing Sites:
World of Windows Networking: http://www.windowsnetworking.com
Leading Network Software Directory: http://www.serverfiles.com
No.1 Exchange Server Resource Site: http://www.msexchange.org
Windows Security Resource Site: http://www.windowsecurity.com/
Network Security Library: http://www.secinf.net/
Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com
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RE: Problem publishing port

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