Firebox x750e  fireware 10.0. 2

Posted on 2009-02-23
Last Modified: 2012-05-06
We have a webserver that hosts 5 websites.  1 website's name is resolved by our internal dns servers and that website works fine.  the others resolve from the isp's dns servers.  none of these websites are available to us.  they are available to users outside of our network.  when i put in a host file entry on my computer for the 4 broken websites they work fine.  

We never had this problem until the firebox was installed.  does anyone know what the firebox is doing?  thanks

Question by:jamesmetcalf74
    1 Comment
    LVL 32

    Accepted Solution

    As all the websites are hosted internally; and you are trying to access the website from the internal machine using FQDN, this is causing a loop, also called event horizon; on a networking device the egress and ingress interfaces cannot be same, so you are having the problem.
    Many devices like cisco incorporate something called hairpin to resolve this issue.

    To resolve the issue as you did, you can add entries in hosts file on the local machine(s); or you can configure your DNS server to redirect the queries from internal machine for the website(s) to internal IP address [called DNS doctoring].

    Thank you.

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    Enabling OSINT in Activity Based Intelligence

    Activity based intelligence (ABI) requires access to all available sources of data. Recorded Future allows analysts to observe structured data on the open, deep, and dark web.

    As dyndns has reduced the capabilities of the free service, I looked around for other free providers of Dynamic DNS service. After testing several I decided to move my DNS hosting to Hurricane Electric as then domains that require dynamic hostnam…
    Data center, now-a-days, is referred as the home of all the advanced technologies. In-fact, most of the businesses are now establishing their entire organizational structure around the IT capabilities.
    After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
    This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor ( If you're looking for how to monitor bandwidth using netflow or packet s…

    759 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    11 Experts available now in Live!

    Get 1:1 Help Now