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Stop DHCP between two LAN ports in cyberoam

Saleem Nasser

I have two subnets each subnet connected to one Cyberoam port as LAN.

PortA with subnet LAN1 192.168.1.0/24 and DHCP server = Windows 2012 

PortC with subnet LAN2 192.168.100.0/24 DHCP server = Cyberoam

each port connected to separate Switch with no connection between them, But the problem the devices from LAN1 take IP from LAN2 DHCP server and LAN2 take IP from LAN1 DHCP server.

I need to prevent any device from LAN1 to take IP from LAN2 and same with LAN2.

I contact Cyberoam Support but they can't fix



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  • +1

    Hi Saleem, 

    In the DHCP Server configuration on Cyberoam, did you select LAN2 as Interface in the DHCP configuration? If set to NONE then Cyberoam will listen to DHCP broadcast from any interface and such issues can occur. 

    Thanks,

    Sachin Gurung
    Team Lead | Sophos Technical Support
    Knowledge Base  |  @SophosSupport  |  Video tutorials
    Remember to like a post.  If a post (on a question thread) solves your question use the 'This helped me' link.

Reply
  • +1

    Hi Saleem, 

    In the DHCP Server configuration on Cyberoam, did you select LAN2 as Interface in the DHCP configuration? If set to NONE then Cyberoam will listen to DHCP broadcast from any interface and such issues can occur. 

    Thanks,

    Sachin Gurung
    Team Lead | Sophos Technical Support
    Knowledge Base  |  @SophosSupport  |  Video tutorials
    Remember to like a post.  If a post (on a question thread) solves your question use the 'This helped me' link.

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