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Mangraviti's avatar
Mangraviti
Joining in
2 years ago
Solved

Help accessing modem mode

I'm sick and tired of this modem and I can't find a straight answer to my question.

I run my Hub 3 in modem mode and I have a proper router to do all my networking and VPN.

The VM Hub is said to be on 192.168.100.1.

My router is on 192.168.100.2. It has a range from 100.1 to 100.254.

How in the name of god can I access the modem?

192.168.100.1 simply won't respond.

And if your answer is to set the Hub to router mode, don't bother answering my question.

Does anyone actually know how to do this?

Thanks in advance

 

  • FlockWallpaper's avatar
    FlockWallpaper
    2 years ago

    No, contrary to popular belief the hub isn’t on 192.168.100.1 when in modem mode, better described as ‘bridge mode’, that’s the internal web server interface address.

     In bridge mode, the VM hub, ‘passes on’ a public address to your own router’s WAN interface, so you need to set that to be DHCP, or dynamically assigned or however they phrase it for your model. What you set for the LAN-side address is irrelevant really.

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    • dinkybluebug's avatar
      dinkybluebug
      Joining in
      11 months ago

      Thanks for this - what is the significance of an IP address of 192.168.100.77  ?

  • legacy1's avatar
    legacy1
    Alessandro Volta
    11 months ago

    because 192.168.100.77 is on the same subnet as 192.168.100.1 so when your PC is connect to the hub in modem mode you will ARP to the hub

    Note this  should not be needed as when your router gets a WAN IP when your LAN tries to go to 192.168.100.1 it will go to its gateway then your router will go the VM gateway at which point the hub should see your going to it and reply but clearly something is wrong with the hub to do this unless your router blocks it but likely a problem with the hub.  

  • Sephiroth's avatar
    Sephiroth
    Alessandro Volta
    11 months ago

    Your router will be double-NATting (you can google that!).  In short, it retranslates the local IP address issued by the Hub's DHCP server into addresses set for your router's LAN.  No big deal except in certain port forwarding circumstances.  You can set your router into bridge mode if you are happy for the Hub 5x to manage all local IP addresses, but that might scupper existing connections for home management devices.

    The Hub 5x still does not implement modem mode properly (see other threads on this topic).  SO what you're doing is reasonable.

     

    • dinkybluebug's avatar
      dinkybluebug
      Joining in
      11 months ago

      My Hub only reports one device connected though… and that’s my router… no other device has an IP address.

  • Sephiroth's avatar
    Sephiroth
    Alessandro Volta
    11 months ago

    I would expect your router to report connected devices - this due to NAT.  If you set the router into bridge mode, then I expect the Hub to report connected devices.  Keep us posted, please.

     

    • dinkybluebug's avatar
      dinkybluebug
      Joining in
      11 months ago

      The issue is that if I turn on bridge/modem mode, then I can’t connect into the hub to check anything. I can’t access it through this magic address 192.168.100.1

      At the moment my hub only shows one device (my router) - my router shows 30 ish connected devices.  No other device is directly connected to my hub.

      Modem mode is so bad my biggest issue is that there’s a power cut, or something, everything reboots, because it wasn’t connected in the right order then it wont work and at that very moment that I need internet, I can’t get it to work.

      Its just too temperamental

       

      • Sephiroth's avatar
        Sephiroth
        Alessandro Volta
        11 months ago
        dinkybluebug wrote:

        The issue is that if I turn on bridge/modem mode, then I can’t connect into the hub to check anything. I can’t access it through this magic address 192.168.100.1

        <SNIP>

        I hope you mean bridge mode in your router.  In theory, when you are in bridge mode to the Hub (which remains in its normal mode), any device connected to the Hub (even through your router) should be able to call on 192.168.0.1.  Even more significant, I'd a expect a wired device connected directly to the Hub to be able to access the settings page via 192.168.0.1.

        So, can we have an unambiguous description of what's connected to what, how it's connected and what you are trying from where?

        In this situation, don't expect any of the VM bods to be able to help you - none of them!

         

  • Sephiroth's avatar
    Sephiroth
    Alessandro Volta
    11 months ago

    Yes - I did earlier point out the disadvantage of putting your router into bridge mode.  So, in your present situation, you can only use your router with the Hub in double-NAT operation.  As you've already described, the Hub only sees your router for reporting purposes; your router translates the single IP address from your Hub into a local IP address (e.g. 192.168.1.17) and back again when sending something out.

    To get into the Hub's settings, if you can't do it from a device connected to the Hub, you should be able to do it by connecting directly to the Hub - either wired or through its WiFi SSID.

    What specific "conflicts" worry you?

    • dinkybluebug's avatar
      dinkybluebug
      Joining in
      11 months ago

      No particular conflicts worry me - other than when you google double NATting - there are many posts saying this should be avoided. Everything seemed to work in this setup

      to be honest the only reason I’m here is because I wanted to use a custom DNS server address and couldn’t change that using the virgin hub - so have opted for a seperate router. 

      im just trying modem only mode again. Still won’t setup - despite following the instructions step by step. 

      even when it was set up correct before - I couldn’t access the hubs setting page. Either by wifi through the router - or by Ethernet to the hub. 

  • Sephiroth's avatar
    Sephiroth
    Alessandro Volta
    11 months ago

    What does that mean? "... when it was set up correct before".  Modem mode doesn't work in the Hub 5X - please check this in other threads.   If you were in the double-NAT mode, then I would have expected at least a wired device directly connected to the Hub to get into the Hub setting page.  Why wouldn't it?  Your router is just another device hanging off it.

    On DNS, I don't think there is a solution when double-NATting.  This thread may be of interest:  https://community.virginmedia.com/t5/Networking-and-WiFi/use-my-own-DNS/td-p/5489942

    VM have royally screwed its Hub 5X users, imo.