Best to set a firewall rule with nftables to block non-vpn traffic from leaving (you should also do the save for IPv4 traffic to prevent leaks in case the tunnel disconnects)
this post was submitted on 05 Oct 2024
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I tried the same setup with Ubuntu 24.04.1 desktop live system and I can replicate this IP leak issue, I guess I will have to disable IPv6.
Disable in network manager?
That is what I was thinking, yes.
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"
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.
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