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VPN Tunnel to Draytek - Multiple subnets but only one Security Association created

03/26/2020 9 People found this article helpful 98,809 Views

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    Description

    A VPN Tunnel to Draytek is going up with only one Security Association (SA) although there are many Local/Destination Networks so more SAs should be created.

    Cause

    It looks like Draytek does not fully support multiple phase 2 security associations for a single VPN Policy with the default settings.

    Resolution

    To fix this, the option "Create Phase 2 SA for each subnet" has to be enabled on the Draytek (Vigor) router:

    Image

    However, this may not work if you have the Perfect Forward Secrecy option disabled on the SonicWall. Please enable it from the configuration of the VPN Tunnel to the Draytek:

    Image

    For further details: How to Create Phase2 SA for Multiple Subnets - Draytek Website

    Related Articles

    • SSL Control and DPI-SSL Compatibility
    • FIPS Mode: Radius protected with IPSEC VPN
    • Maximum DHCP Leases

    Categories

    • Firewalls > SonicWall NSA Series > VPN
    • Firewalls > TZ Series > VPN
    • Firewalls > SonicWall SuperMassive 9000 Series > VPN

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