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IPv6: UTM doesn't respond to FF02::2

stimmerman
Hi,

We have Sophos UTM 9.2 with IPv6 enabled. We have 2A02:****:****:400::/56 subnet

Wan interface: 2a02:****:****:401::2/64
Wan gateway: 2a02:****:****:401::1/64 (Mikrotik router to ISP)

Lan interface: 2a02:***x:****:402::1/64

IPv6 works when I assign a static IPv6 address to a Windows 7 client on the lan segment of the UTM. The UTM will route it and I have internet connectivity.

But I want the clients to get the IPv6 address by them self, so I enabled the prefix advertisement on the lan interface. This however isn't working for me.

I can see the clients do router advertisements with wireshark but the UTM doesn't respond. Also when I do a multicast ping to FF02::2 (the all ipv6 routers address) the UTM doesn't respond.

I have also tested this with a Mikrotik router, it does respond to the FF02::2 ping and immediately delegates prefixes.

What can I do to make the IPv6 prefix advertisement to work? And shouldn't the UTM respond to the FF02::2 ping because it's a router?


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  • 0
    The UTMs should reply to ff02::2 pings, and does in our network. I'm getting response of both cluster nodes.

    Haven't done anything special. Only difference to our setup seems to be that we use DHCPv6 instead of RA, because, back then when we started to use IPv6, (i think it was) Mac OS X which didn't supported RA back then yet.
  • 0 in reply to UrsWeiss
    Hi,
    I run native IPv6 on this UTM.
    Ping ff02::2 from
    UTM,
    MAC,
    W7 64 parallels on MAC

    All fail.
    All icmp features are enabled.

    Ian
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