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Sohos XG Home - Initial Setup (Bridged Mode)

Travis Holden

Hi there, 

 

This is the first time I've used Sophos, so please bare with me if there is anything I'm doing incorrectly.

 

I am trying to run Sohos in Bridged mode, using my modem as the DHCP server, I've followed a few videos on making this work, this is what I've done so far:

Created a IP Host - Pointing to my DHCP server 192.168.100.254

Allowed inbound and outbound DHCP requests (Match known users is disabled)

 

 

The issue I'm running into is, that I am not obtaining an IP Address from the Sohops device from the DHCP Server (My  Modem), this happens when I manually configure the IP Address/Default gateway of the PC Client as well. to (192.168.100.x /24)

 

I can access the web portal from my PC Client, if I plug my TPlink directly into the modem, then it can reach the Sophos device on the network (Although very slow and connection interrupts sometimes)

 

Specs:

  • Home Modem (DHCP Server) 192.168.100.254
  • Qotom Q106P Running Sophos XG Home - 8 GB RAM, 240 SSD, 2x Gigabyte ports. IP Address: 192.168.100.249 /24
  • 4 port TP Link
  • Windows 10 PC Client - 192.168.100.20 /24
  • Network Scheme: 192.168.100.x /24

Things I've tried:

Factory Reset - re-running setup config

Manually assigning IP Addresses of PC Client

Running Wireshark (It seems to be flooding with ARP Broadcast Requests) - I believe this causes the sophos device to be unavailable sometimes, and logs me out of the web portal.

 

 

I'm also confused about these bridged connections, physically on the device I only have Port 2 plugged in (To the modem) and Port 1 is unplugged, but on the sophos portal, it says that Port 1 is plugged in... Could this be a hardware issue? It seems to have the ports mixed up..

 

 

Please let me know if there's anything else I can try



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  • 0

    The first thing is your interface is probably causing you issues, the recommended connection is autonegotiate.

    Why do you want to use the XG in bridge mode, rather than router mode and have your modem in bridge, you will get more secure network that way.

    Ian

  • 0 in reply to rfcat_vk

    Thank you for your response, I will try that switching to auto-negotiate. (I hadn't changed anything, it must have done this from the setup config)

     

    The reason I wanted to use bridged mode, was that I didn't want to interrupt my network, bringing down my DHCP server on the modem would cause everything on the network to lose its configuration when the lease is up.

     

    From what I could tell, the only benefit that you lose out on is being able to create a VPN, which I do not have any need to access my network from outside my network.

     

    But if there's anything else, I will definitely switch to router mode.

     

    Thanks!

    -Travis

     

  • 0 in reply to Travis Holden

    Sorry - just an update, both ports are already set to auto-negotiate. 

     

     

    This is where I get confused, I have it physically plugged into Port 2, but the Sophos portal says it is plugged into port 1, could this be the hardware configured incorrectly? The NIC being in the wrong expansion slot on the device its self? 

  • 0 in reply to Travis Holden

    Hi Travis,

    based on the screenshot you appear to have a faulty cable. you should be seeng 1gb/s fun duplex. The 100mb/s half duplex will be causing some of your issues.

    The best way to identify active interfaces is move an active cable between them noting which one light up.

    You didn't say what you hardware is, but port labelling and XG are not always aligned.

    If you set the XG in route mode you can create your DHCP server on the XG and put a simple LAN to WAN rule in place while you refine your needs.

    Ian

  • 0 in reply to rfcat_vk

    Hi Ian,

     

    I've swapped the network cable, same result. - Both ports do light up when plugged in.

     

    Quick question, if I'm to configure the sophos device as my DHCP, of the two ports 1 being the LAN and 2 being the WAN (connection to the ISP Modem), should it be plugged into a LAN port on the modem, or plugged into the WAN ?

     

    --

    Travis

  • 0 in reply to Travis Holden

    Hi Travis,

    the XG should be plugged into your modem LAN port and your internet connection to the WAN port after you have put the modem into bridge mode and put the XG into router mode.

    Ian

  • 0 in reply to rfcat_vk

    So, just so I'm understanding this correctly.

     

    The sophos connections should be:

    Port 1: LAN port on Modem

    Port 2: WAN port on Modem

     

    I've been plugging port 1 into my PC to configure it.

  • 0 in reply to Travis Holden

    Hi Travis,

    the modem is only connected on the WAN port, the LAN port is where you connect a switch so that your PC can access the internet through the XG.

    Ian