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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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Need help with NetworkManager, VPN and IPv6 (lemm.ee)

submitted 17 hours ago by [email protected] to c/[email protected]

5 comments fedilink hide all child comments

I was setting up my laptop for traveling and adding Wireguard VPN configuration.

The Wireguard config generated by router only contains IPv4 address (10.0.5.x), and while testing the VPN to my surprise "what is my ip" websites can find my IPv6 address (I USB tethered mobile connection to my laptop).

It looks like NetworkManager does nothing about IPv6 connection if VPN doesn't have IPv6 settings, which is bad for road warrior type of VPN configuration.

Is there an easy toggle to turn of IPv6 if VPN is connected and otherwise? Or is only option to disable all IPv6 no matter what?

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[–] [email protected] -2 points 14 hours ago* (last edited 14 hours ago) (2 children)

I'd also like to know, is there a way to just turn off this ipv6 trashfire? Preferably in a universal, cross-distro way?

Seems like the most universal way is: GRUB_CMDLINE_LINUX_DEFAULT="ipv6.disable=1 quiet splash"

[–] [email protected] 3 points 12 hours ago (1 children)

Or you could just... learn to use the modern internet that 60% of internet traffic uses? Not everyone has a dedicated IPv4 anymore, we are in the days of mobile networks and CGNAT. IPv4 exhaustion is here today.

[–] [email protected] 1 points 14 hours ago* (last edited 14 hours ago)

In my case just disable IPv6 in WiFi is enough.

sysctl looks like the most universal way.

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1