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

Losing DHCP Gateway

This problem started with 17.5.0 GA.  The firewall is handling DHCP for my lan.  Users have started to lose the default gateway(the Firewall) randomly throughout the day.  I have to either reset the switch or the desktop network adapter in order to regain internet connectivity.  This does NOT happen to all users at the same time.

I updated to XG 115 SFOS 17.5.5 MR5 but the problem still exists.  This actually introduced another problem of not being able to access the gui from Sophos Central, but that's not as pressing.  Any thoughts on this would be appreciated.



This thread was automatically locked due to age.
  • Hi All,

    My sincere apologies for this inconvenience. For any customers who have already upgraded to the latest SFOS release and are still experiencing issues, would it be possible to please raise a support case and PM me with your case ID so that further investigation can be performed?


    Community Manager, Support & Services

    Support Videos | Product Documentation@SophosSupport | Sign up for SMS Alerts
    If a post solves your question, please use the 'Verify Answer' button.
  • Hi All,

    Thank you for your regress feedback & support

    With MR6, we have been closed with JIRA ID NC-46351, which was earlier reported. 

    We are working on the JIRA ID NC-48031, till now please use the CLI to switch the DHCP old config generate method.







  • Hi,


    for me the cli command did not helped - the DHCP actually gives me default gateway and DNS IP adressses for the wireless clients, but still no internet connection available for them. All of the wireless clients are affected. (TV, laptops, wifi extenders, etc)


    I also noticed that on the interface tab my default gateway which is facing towards the internet is showing status a big red dot. 


    The wired or virtual Network clients are able to use he connection without any issue and connecting to the internet.


    It started to happen only today. The upgrade was done to MR6 a week ago aproximatelly.


    The firewall is running on Hyper-V. Rebuilding the DHCP did not helped.


    I have another XG home on phyical machine which was upgreded same time and have same configurtaion, but that did not experience this issue.


    Any ideas what I can do?


    red color: guest WLAN

    Green color: LAN/WLAN intranet

    blue color: internet

  • Actually i rebuilded the XG Firewall on Intel hardware (and finished with the Hyper-V one) with the latest firmware and its working without any issue.

Reply Children