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  1. #1
    Newbie
    Join Date
    May 2020
    Location
    UK
    Posts
    13

    Question Routing between two IPsec VPN's

    Hi all, I need some help resolving my IPSec routing issues!

    1) My main subnet is 10.100.1.0/24 with my Untangle gateway being 10.100.1.1/24.

    2) My grandparents subnet is 10.100.12.0/24 with their Draytek router being 10.100.12.1/24

    3) My subnet of 10.100.1.0/24 and my grandparents subnet of 10.100.12.0/24 are connected and routed together via a IPSec Tunnel. My grandparents Draytek router dials into my Untangle firewall. Due to limitations at the Draytek end, this needs to stay as a IPSec site-2-site VPN tunnel.

    4) I also have a L2TP address pool of 10.100.101.0/24 and a IKEv2 address pool of 10.100.102.0/24 for dialing into my Untangle FW from devices like my Laptop, iPhone, iPad, etc...

    5) When I connect to my Untangle Firewall via L2TP from my Laptop for example, I can not accsess the 10.100.12.0/24 subnet range at my grandparents.

    Adding a "stupid" static route of 10.100.12.0/24 to 10.100.1.1 in my Untangle firewall only works for a very short while before it stops working and I am unable to access the 10.100.12.0/24 subnet from the 10.100.101.0/24 and 10.100.102.0.24 subnets!

    See below of the trace routes. I was connected to the VPN on my laptop at home, hence the low ping time to 10.100.1.1

    Trace Route.JPG

    How can I fix this?

    Regards: Elliott.

  2. #2
    Newbie
    Join Date
    May 2020
    Location
    UK
    Posts
    13

    Default

    If add a static route to my Untangle FW, it will work for a short while (a couple of minutes) and then stop working. Below is the trace route whilst it is working. It is like my static route is being superseded by another route.

    Attachment 10752

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