Thread Info
  • State Not Answered
  • Locked Locked
  • Replies 3 replies
  • Subscribers 7 subscribers
  • Views 2134 views
  • Users 0 members are here
Options
Suggested
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Sophos UTM - No internet after restart

Aren Kern

Hello,

First time poster so forgive any mistakes but I am having trouble whenever I restart my UTM.  If I do a restart, my devices on the network cannot access the internet.  It will show me "State = Down, Link = Up".  There is nothing wrong with my cable modem.  I usually solve this by restarting and restarting the UTM over the course of a day or so, and one of those times it comes back up.  Is there any way I can check what is going on?  Anyone have any ideas?

I should state that this is a new issue.  I had my UTM and cable modem in a different part of the house and never had an issue after a restart.  But did some re-arranging and moved the location. This only started once I moved both the cable modem and the UTM.  (I can't see why that would cause an issue)

I am using:

  • Sophos UTM 9.703.3 - on an old min-pc (Zotac)
  • One internal NIC (eth0) - connects to switch
  • External NIC (eth1) - via USB port connects to cable modem (TPLINK)

 

Thanks!



This thread was automatically locked due to age.
  • 0

    Hi Aren and welcome to the UTM Community!

    This sounds like a problem between the cable modem and the outside world.  I'd first try unscrewing both ends of the cable connecting it to the wall and then reconnecting it. No luck?  Try a different cable.  Still no luck?  Try moving the setup back to where you had it.  Still no luck?  Go around the Cox modem and replace it with a Motorola.  Please let us know if any of that worked.

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • 0

    Hello,

     

    I can confirm a similar problem with my TPLink LTE router for my backup WAN.

    Sometimes the link failed suddenly after longer time, also after reboots of the UTM.

     

    One possible workaround was to login on the UTM admin web gui and refresh the ip / dhcp or disable/enable the interface.

    I remember there was a problem with the autonegotiation mode, after setting it manually to 1gbps it was fixed for me.

    After placing the tplink on the loft and linking to a HP switch the need for manually setting speed config was gone.

  • 0

    Hello Aren,

     

    I have the same problem, as many others too. Therefore I posted an idea, and linked even to a possible solution which should be easy to implement for Sophos - as to my understanding. However, maybe I am also wrong, I don't claim I know more then them. But the solution posted seems to do the trick for all other users having the same firewall-modem problem.

     

    ideas.sophos.com/.../40262164-auto-renew-dhcp-after-outage

     

    As to setting the interface-speed to a fixed speed, not auto-negotiate: It reliably worked for me when setting it to 100MBit, but did not work at all when setting the same NIC to 1GBit.

     

    Edit: As nd said, putting a switch between modem and  Sophos UTM solves the issue as well. If you have a managed switch, I can tell you how I configured mine to avoid having an additional switch only for keeping the UTM up and running.

    Kind regards,

    Markus

Unfiltered HTML