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Author Topic: IPv6 routing via OpenVPN won't work  (Read 3529 times)

QuentinC

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IPv6 routing via OpenVPN won't work
« on: June 24, 2018, 06:28:19 pm »
Hello,

I am working in the configuration of some router using OPNsense.
Here is the desired behavior:
- Two internal VLANs: one "direct" and the other "secure".
- Two "WANs": the main one: on the internet (IPv4 & IPv6) and the other is a OpenVPN client (to AirVPN).

I want to redirect the "direct" lan to the main WAN, and the "secure" lan to the VPN client.

Here are the issue:
I cannot make this to work in IPv6.

Let me explain:
- IPv6 works perfectly for the "direct" lan, the clients are on a /64 public subnet and the routing is working fine.
- IPv4 works perfectly on both LANs, using NAT with a /24 subnet for the "direct" lan, and redirect gateway to OpenVPN for the "secure" lan.

But:
- IPv6 never gets out when coming from the "secure" lan to the vpn.

Here is what I have found while digging into the issue:
- The VPN client works correctly both in IPv4 and IPv6.
- I can make this configuration work by manually setting IPv6 addresses on the VPN interface (using xxxx:xxxx::1 for the gateway, and the VPN assigned IP for the interface IP).
- It seems that, on VPN connect, the IPv6 settings are not assigned to the interface (like it's done for IPv4).

Am I right ?

Thanks a lot,

Quentin
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QuentinC

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Re: IPv6 routing via OpenVPN won't work
« Reply #1 on: July 04, 2018, 05:04:20 pm »
Any idea ?

Should I move this thread or create an issue on Github ?

Thanks,

Quentin
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marjohn56

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Re: IPv6 routing via OpenVPN won't work
« Reply #2 on: July 04, 2018, 06:02:59 pm »
Hi,


Better to raise an issue on Github.
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QuentinC

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Re: IPv6 routing via OpenVPN won't work
« Reply #3 on: July 07, 2018, 02:41:16 pm »
Thanks, here it is !
https://github.com/opnsense/core/issues/2522

Have a nice day !
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