The IPv6 switch and what it changes
The IPv6 switch in Settings is off by default. Most people never need to touch it, but if your ISP is IPv6-first, or you need a service that only publishes AAAA records, turn it on.
Turning it on
- Open Settings, find the IPv6 switch and enable it.
- The core restarts on save and DNS starts returning AAAA records — related options are in DNS settings.
- On TUN mode, also confirm the node itself supports IPv6; resolving an address you cannot reach helps nobody.
What to watch for afterwards
The classic symptom is that some sites get slower. Once the system has an AAAA record it tries IPv6 first, and if that path is dead it waits for a timeout before falling back to IPv4. When neither your node nor your local network really speaks IPv6, leaving the switch off is genuinely faster.
The other trap is geolocation: some services decide where you are from the IPv6 exit address. When that disagrees with your IPv4 exit you can trigger extra verification or see different content.