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Losing DHCP Gateway

Larnel Hight

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.

Thanks

Larnel



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  • 0

    Can someone please tell me if you are able to still use all of the advanced dhcp options even with the dhcp method set to "old"? no issues?

     

    I'm planning to turn a few on for a vlan project on a new XG, not ordered yet, but I'm going to need to be in the old dhcp setting to avoid this other issue we are discussing.

  • 0 in reply to apalm123

    For my curiosity, what do you consider as "advanced option" in and XG DHCP ?

    Paul Jr

  • 0 in reply to Big_Buck

    These types of options: https://community.sophos.com/kb/en-us/123529

     

    This article describes the detailed configuration of DHCP Option Objects and their application to the static or dynamic DHCP scopes in Sophos XG Firewall. The DHCP server options feature provides support for all DHCP option objects, i.e., 1 to 255. This feature supports the following standards:

    • RFC 2131 - Dynamic Host Configuration Protocol
    • RFC 2132 - DHCP Options and BOOTP Vendor Extensions Standards
  • 0 in reply to apalm123

    Yes, but,  you are using CLI and not the GUI.  DHCP there is a module, possibly open source.

    When Sophos migrated their MTA to Exim, obviously, the CLI related to MTA functionalities must have changed significantly.  No ?

    Anytime someone is doing CLI in XG, he risks loosing setup if Sophos changes that module for something else.  Which may well happen when the core changes with v18.  Since it already happened with Exim and Strongswan.

    My two cents of theory.

    Anyone knows what open source code Sophos uses for that DHCP ?

    Paul Jr

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  • 0 in reply to apalm123

    Yes, but,  you are using CLI and not the GUI.  DHCP there is a module, possibly open source.

    When Sophos migrated their MTA to Exim, obviously, the CLI related to MTA functionalities must have changed significantly.  No ?

    Anytime someone is doing CLI in XG, he risks loosing setup if Sophos changes that module for something else.  Which may well happen when the core changes with v18.  Since it already happened with Exim and Strongswan.

    My two cents of theory.

    Anyone knows what open source code Sophos uses for that DHCP ?

    Paul Jr

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