openvpn-connect disables client ipv6

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sliddjur
OpenVpn Newbie
Posts: 12
Joined: Thu Feb 13, 2020 3:13 pm

openvpn-connect disables client ipv6

Post by sliddjur » Fri Jun 03, 2022 9:56 am

Setup:
Windows 10 or windows 11 with openvpn-connect 3.3.6 connecting to openvpn-as 2.10.3.
Using split tunnel ipv4-only setup, with dns from openvpn-as.
Openvpn-as does not push any ipv6 routes or addresses.
Client has a SLAAC ipv6 address and default route from local router

Issue:
When windows clients connect with openvpn-connect 3.3.6 to access server, it seems ipv6 is practically disabled.
ipv6 ::/0 route is still correct and untouched, however, it does not use ipv6 at all, even though it still receives AAAA records from dns-server.
I have tried going into openvpn-connect advanced settings under "ipv6 tunnel preferences", but changing these values does not change this behaviour.

Workaround:
if the same client downloads the same openvpn-profile but imports it to openvpn-community application, ipv6 works as expected.


Is this a "feature" of openvpn-connect? How can I solve this?

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