Results 1 to 8 of 8
  1. #1
    5 Star Lounger jujuraf's Avatar
    Join Date
    Jun 2001
    Location
    San Jose, California, USA
    Posts
    1,061
    Thanks
    0
    Thanked 0 Times in 0 Posts

    page not available from VPN

    Hi all,
    I need help understanding why only one page on my husband's web site (I built it and maintain it) is accessible sometimes but not others. <img src=/S/confused.gif border=0 alt=confused width=15 height=20> The times that I can't access it is when I try from when I'm at work (which I know is behind various firewalls) and when I'm at home but connected via VPN to my company's intranet (which I use, of course, to get to the Internet). If I'm not at work and not connected via VPN, I have no problem accessing it.

    The page in question actually resides on a computer at our house (the rest of the site is hosted elsewhere but this one page is on this PC - why? long story, but it has to be, no way around it that wouldn't cost $$$ and more know-how than I have). The users get to this 'home based' page from a button which loads the page with an address such as http://n.n.n.n:8080/vi/some_web_page.htm (where n.n.n.n is this computer's IP address).

    The error I get is 'cannot fnd server' on the browser title bar, and 'page cannot be displayed' on the page itself.

    Is the fixed address the problem? Is it that I have to use a non-default HTTP port? (My DSL provider prevents me from using port 80 so I use 8080 which works just fine) The page does fetch a plug-in (sort of) from National Instruments (www.ni.com) so maybe that's the part that's actually failing. (I'll call them later this week but not sure how much help they'll be.)

    Any ideas on what the problem is?

    Thnx,
    Deb

  2. #2
    Silver Lounger
    Join Date
    Jan 2001
    Location
    Indianapolis, Indiana, USA
    Posts
    1,862
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: page not available from VPN

    Hi Deb,

    This problem could be caused by several things. First, when you're connected through your company's VPN, you create a direct connection from your computer to their network. Any internet sites you access while connected actually come through your company's connection before making it to your computer. Therefore, the fact that you can't see your husband's site while connected to the VPN makes sense (since you can't see it while at the company office also).

    Second, the problem probably lies in the port (8080). Many company networks only allow specific ports to be open to traffic (such as 80) and strictly block all others. I had a similar situation in my last company. My web-based email from one of my web hosts was on port 8383, which was blocked by my company. I could only access it from home.

    As for a solution, I'm not sure I can think of one at this point due to the fact that your ISP has an issue with using port 80 for the website.

    Hope this helps.

  3. #3
    5 Star Lounger jujuraf's Avatar
    Join Date
    Jun 2001
    Location
    San Jose, California, USA
    Posts
    1,061
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: page not available from VPN

    Yeh, I figured this was the problem. <img src=/S/bummer.gif border=0 alt=bummer width=15 height=15> I'll have to ask the IT folks to confirm this but it does sound reasonable. Knowing that the folks who will be visiting this site will more likely be doing it from a corporate network with the same sort of protection means that they too won't be able to connect to this one page. (It's a live demo of the major product the site sells and the software that makes it 'live' can't be installed on the hosted web server.)

    I'll also contact my DSL provider to confirm if they restrict port 80 or not. I never actually asked them but when I was setting up this page I had several other problems as well. After solving these problems, I just left the port at 8080 not bothering to confirm that it was required or not.

    Thnx,
    Deb

  4. #4
    5 Star Lounger jujuraf's Avatar
    Join Date
    Jun 2001
    Location
    San Jose, California, USA
    Posts
    1,061
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: page not available from VPN

    Update... I contacted my DSL provider and they say they do not block port 80 so I went and changed the link to this one page to remove the ":8080" I then tried from several computers and was able to get to this page but, when I'm on VPN I still get 'cannot find server' error so I have no idea what the problem is.

    I'm using http://www.dyndns.com to get this computer's IP in the DNS and it seems to work just fine - other than from VPN (or at work).

    For a test, I created a simple .htm file with nothing in it but "hello" and I still wasn't able to view it. (I thought maybe the plugin was the problem but this shows it's not.) <img src=/S/disappointed.gif border=0 alt=disappointed width=15 height=15>

    I have no idea what to change now to make it work. <img src=/S/bummer.gif border=0 alt=bummer width=15 height=15>

    Deb

  5. #5
    Super Moderator jscher2000's Avatar
    Join Date
    Feb 2001
    Location
    Silicon Valley, USA
    Posts
    23,112
    Thanks
    5
    Thanked 93 Times in 89 Posts

    Re: page not available from VPN

    > I then tried from several computers and was able to get to this page...

    Computers at work? That might rule out a firewall policy... if the work computers still can't access it, I'd try your IT people.

  6. #6
    5 Star Lounger jujuraf's Avatar
    Join Date
    Jun 2001
    Location
    San Jose, California, USA
    Posts
    1,061
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: page not available from VPN

    My IT people? <img src=/S/rofl.gif border=0 alt=rofl width=15 height=15> I *am* my IT people. <img src=/S/sigh.gif border=0 alt=sigh width=15 height=15> Remember this is one page of a hosted site that sits on a PC in my home office. When I load http://n.n.n.n/folder-name/index.htm it is only visible if I'm not on my VPN connection and not viewing it from work (which is behind some unknown firewall, etc.).

    It has to be some security thing - port thing - I dunno. I even created a .htm page with just the words "hello" and I can't view that page from my computer at work or if I'm home connected via VPN to my employer's intranet. It works fine with a 'normal' connection. The only thing left is to talk to the router folks and see if there is some port setting that I can change to make it this locally (home based) page visible at all times.

    I don't know enough about what's going on to troubleshoot on my own anymore.

    Thnx, Deb

  7. #7
    Silver Lounger
    Join Date
    Jan 2001
    Location
    Indianapolis, Indiana, USA
    Posts
    1,862
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: page not available from VPN

    Wait a second.....!!

    I just realized that I didn't read your first post carefully enough. You're trying to connect to your local website using the IP address while connected to your work VPN, right? Is that using your *local* IP (like 192.168.0.1) or the remote IP?

    If you're trying to use the local IP, it makes sense that you can't see it. When you're connected via VPN, it makes your computer appear like it's on the remote network. That same thing happens to me when I connect to my office via VPN. I can no longer interact with the network in my home while connected. Your computer actually receives a new "virtual" IP address that is part of the remote network. Anyway... if this is the case, then it's not a problem but rather a *feature*.

    If you're actually using the Domain Name or remote IP to talk to your home PC through the VPN connection, then there must be a firewall issue of some kind. If you can hit your home website from your office then there's no reason you shouldn't be able to hit it (using the same URL) from the VPN connection.

    Hope this helps

  8. #8
    Super Moderator jscher2000's Avatar
    Join Date
    Feb 2001
    Location
    Silicon Valley, USA
    Posts
    23,112
    Thanks
    5
    Thanked 93 Times in 89 Posts

    Re: page not available from VPN

    I meant IT people at work, but maybe that's you, too. In that case, ask yourself to check whether your firewall policies somehow require a domain name (not just an IP address) in the URL. <img src=/S/smile.gif border=0 alt=smile width=15 height=15>

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •