Strange New IPV6 Warning

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rdsmith24

Posts: 5
Joined: Sat Dec 09, 2017 3:03 am

Post by rdsmith24 » Sat Dec 09, 2017 3:06 am
Suddenly I am getting a new warning in my client side log:

WARNING: OpenVPN was configured to add an IPv6 route over utun6. However, no IPv6 has been configured for this interface, therefore the route installation may fail or may not work as expected.

This wasn't there before and I see no way to disable it....server is set to UDP IPv4

Thanks for any insight.

James

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Posts: 2143
Joined: Thu Sep 04, 2008 9:27 pm

Post by James » Mon Dec 11, 2017 11:36 am
Hi rdsmith24,

It sounds likely that your connection has the "Send all traffic over VPN connection" item selected for the "All Traffic" option (under the Networking tab when editing your connection). This will attempt to direct both IPv4 and IPv6 traffic through the VPN connection. The warnings you're receiving are harmless, however to get rid of them you can select the "Send all IPv4 traffic over VPN connection" option instead (or select Automatic and leave it to the server).

Cheers,
James
James Bekkema
Viscosity Developer

Web: http://www.sparklabs.com
Support: http://www.sparklabs.com/support
Twitter: http://twitter.com/sparklabs

rdsmith24

Posts: 5
Joined: Sat Dec 09, 2017 3:03 am

Post by rdsmith24 » Tue Dec 12, 2017 1:57 pm
Thanks, that was it...

jprokos

Posts: 2
Joined: Thu May 10, 2018 7:55 am

Post by jprokos » Sun Jan 02, 2022 2:19 pm
Having the same issue. I tried the solution mentioned above but still receive the warning.
2022-01-01 21:16:43: WARNING: OpenVPN was configured to add an IPv6 route. However, no IPv6 has been configured for utun10, therefore the route installation may fail or may not work as expected.
2022-01-01 21:16:43: add_route_ipv6(2000::/3 -> :: metric -1) dev utun10
This is on macOS Catalina

Settings:
Send all IPv4 traffic over VPN connection
Full DNS (Use VPN DNS for all traffic)

Does it matter what settings I have for IPv6 in Network Settings for my Ethernet connection? Or what settings I have on my router?

When I restarted the router and the connection went down I received this in the Viscosity log:
2022-01-01 21:16:16: write UDP: No route to host (code=65)
2022-01-01 21:16:16: State changed to Disconnecting (Manual)
2022-01-01 21:16:16: delete_route_ipv6(2000::/3)
2022-01-01 21:16:16: SIGTERM[hard,] received, process exiting
2022-01-01 21:16:16: State changed to Disconnected (Process Terminated)
2022-01-01 21:16:43: Viscosity Mac 1.10.1 (1586)
2022-01-01 21:16:43: Viscosity OpenVPN Engine Started
2022-01-01 21:16:43: Running on macOS 10.15.7

James

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Posts: 2143
Joined: Thu Sep 04, 2008 9:27 pm

Post by James » Mon Jan 03, 2022 8:53 pm
Hi jprokos,

Can you please post (or email to us if you'd prefer them not to be on a public forum) the details requested in the following article and we'll take a look at where the IPv6 route/s are coming from for you.
https://www.sparklabs.com/support/kb/ar ... ort-staff/

Cheers,
James
James Bekkema
Viscosity Developer

Web: http://www.sparklabs.com
Support: http://www.sparklabs.com/support
Twitter: http://twitter.com/sparklabs
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