DNS Question

From: Tim Dumbleton (anonymous_at_discussions.microsoft.com)
Date: 06/21/04 

Date: Mon, 21 Jun 2004 09:29:18 -0700

I have:

SBS behind a firewall
exchange ports for POP and SMTP are hosted thru the
firewall.
Users in Mexico and the US
DNS being done by our ISP in NY.

I want to be able to access the mail server with pop both
INSIDe and outside the firewall. The outside is no
problem as the DNS is set to use the public address of
the firewall. But once inside the firewall, the address
don't function. I want to have different assignments
inside the firewall so that the same addresses will work
in both places...

thanks in advance.

Relevant Pages

  • Re: [fw-wiz] appropriate response for mail break-in
    ... > (and I am still receiving them as of a minute ago). ... > number that connected to your SMTP server to deliver the mail (the first ... > the sender is on the outside of firewall and comes from the sending MTA ... a host performing SMTP need not have any DNS ...
    (Firewall-Wizards)
  • Website setup questions.
    ... Create firewall rule to direct HTTP port 80 to the SBS External NIC ... Create firewall rule to point DNS port 53 to the SBS External NIC ... NICS to get this request to not timeout or be refused. ...
    (microsoft.public.windows.server.sbs)
  • Re: For Microsoft Partners and Customers Who Cant Download or Access
    ... Using ipconfig /all showed the DNS IP is in fact the same IP ... as the firewall as you mentioned. ... Microsoft for msdn2.microsoft.com. ... use a static IP and set the DNS server addresses to the DNS ...
    (microsoft.public.dotnet.general)
  • Re: Setting another machine as a firewall
    ... I don't think a firewall is really the right technology to ... The alternative to implementing a proxy mail server on your firewall ... internet, then that is just a matter of writing filter rules to allow ... As far as DNS goes, combining a NAT'ing firewall with a mailserver on ...
    (freebsd-questions)
  • Re: E-Mail Address Cant Receive E-Mail from *Some* External Organizations
    ... The fact that _some_ messages are delivered is because they are sent from different IPs, so double-check your firewall settings. ... So, that looks right to me, anyway; both resolve to the proper IP address of the external interface for our firewall, and the only difference is that for "company.org" our ISP's mail server acts as a backup server in case our internal mail server is down. ... However, if I send a message to "me@xxxxxxxxxxxxxxxx" from my Yahoo e-mail account, I get an NDR returned to my Yahoo account. ... I have checked with our ISP who handles our DNS settings, and they indicate that all appears to be in order with our DNS and MX records. ...
    (microsoft.public.exchange.admin)