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Unable to connect to hosted FQDN with public IP from LAN

Posted on 2009-05-03
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Last Modified: 2013-11-16
I have recently setup an inhouse e-mail server (Kerio) on XP Pro SP3. Network is a P2P with a Watchguard Firebox SOHO6 and Qwest DSL M1000 in bridged mode with static IP. Mx is configured correctly and appears to working fine. DNS addresses are Qwest ISP for primary and secondary.

Prolem is that I can access network from outside using FQDN and IP but not from inside.

However I can't connect using public IP with ping, tracert, HTTP or IMAP on the inside.
Can connect using internal private IP.
Have disabled firewalls and used host file to no effect.

This is necessary inorder to allow laptop to connect to the e-mail server while off the internal network with changing host files or Ip settings.

I'd prefer to not setup an internal DNS server (BIND, etc.), thoughts?
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Question by:mountainandtown
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blue-screen earned 500 total points
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You either need to set up an internal DNS or the Watchguard need to be configured to alter the incoming DNS replies.  Cisco IOS and ASA can both do this, but I don't know about the Watchguard.  Other than that, you'd need an internal DNS server.

Try setting the DNS server to point to the Watchguard.  If it runs a proxy DNS service, it might be smart enough to manipulate replies destined to addresses that it handles, even if it won't manipulate transit DNS packets.

.



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by:mountainandtown
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Thanks, looks like I do need to setup a DNS server on the XP box. Any suggestions on a basic DNS server?
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by:blue-screen
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I have never set up a DNS server on an XP box, but Google seems to show a number of choices.

If you can get a DNS translating firewall, that would be an easier choice.  I think you can even do that with DD-WRT on a number of home router platforms like the Linksys WRT54G.
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