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Sophos xg can't resolve own hostname and internal server

initB10r

Hello all,

I am currently trying to configure Sophos xg to replace my Fritzbox.

From problems with certificates, I have become aware that my DNS resolution for internal hosts and the xg itself is not working.

Currently I have only a test client, which has the xg entered as the default gateway and DNS server.

When accessing blocked websites I always had problems with the certificate and had read somewhere that I should choose the hostname of the firewall as redirection page so that there are no problems with the CN.
Here I found out that I can not make a ping on the name of the XG. Now I added the XG as DNS-HOST, but it still does not work. Also other host, which are meanwhile also registered as DNS host I can not reach via ping.

Does anyone have an idea what I have configured wrong?

Many greetings
Marc



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  • 0 in reply to initB10r

    There was no mention of another router between you and your ISP.

    DHCP on the XG is for it to receive an IP address on its WAN interface and other details from the ISP.

    Please try with the Fritzbox in bridge mode and DHCP enabled on the WAN interface on the XG.

    Ian

    XG115W - v20 GA - Home

    XG on VM 8 - v20 GA

    If a post solves your question please use the 'Verify Answer' button.

  • 0 in reply to rfcat_vk

    I'll have to wait for the new hardware. I'm just wondering what it could have to do with the Fritzbox. DHCP and DNS are off there and the XG is the only DHCP and DNS in the network. Everything works, but the XG does not return its own HOST or other DNS entries.
    I will report when I have XG running on the new hardware and the Fritzbox is only used for VoIP.

  • 0 in reply to initB10r

    With your Fritzbox in bridge mode your VoIP will not work. You will need the interface on the Fritzbox the XG connects to, to be assigning addresses for the XG to work correctly and you will have double NAT on your network.

    Ian

    XG115W - v20 GA - Home

    XG on VM 8 - v20 GA

    If a post solves your question please use the 'Verify Answer' button.

  • 0 in reply to rfcat_vk

    Thanks for the advice.
    I plan to use a ZyXEL VMG1312-b router as a DSL modem and the Fritzbox will only do VOIP.

  • 0 in reply to initB10r

    It is even more frustrating.

    Now I have switched off the Fritzbox and DSL comes via ZyXEL.
    DSL cable goes to the DSL port in ZyXEL.
    Network cable connects ZyXEL with port 2 of the XG (WAN)

    DSL connection is correctly established and all interfaces are green:

    DNS from PPPoE is active

    But I still can't resolve my XG  :-(

    I really need ideas as I have run out of ideas.

  • +1

    The problem is solved.

    I only have 8.8.8.8 in the DNS settings. The internal DNS entries are still found.

    It was important for me that all DNS hosts were specified as complete domain names. For example:

    host1.myhome.local
    host2.myhome.local
    host3.myhome.local

    In the DHCP settings I then had to specify the domain name myhome.local.

    Now it works to ping on host1 or also on host1.myhome.local

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