---
title: "How to Stop IPv6 Leaks on Windows, Mac, and Linux"
url: "https://astraguardvpn.com/blog/how-to-stop-ipv6-leaks-windows-mac-linux"
description: "Fix IPv6 VPN leaks on Windows, macOS, and Linux with clear settings and verification steps."
updated: "2026-07-16T00:42:22.504Z"
---

# How to Stop IPv6 Leaks on Windows, Mac, and Linux

Concrete OS settings to disable or contain IPv6 so your VPN cannot be bypassed.

Concrete OS settings to disable or contain IPv6 so your VPN cannot be bypassed. Windows Settings → Network → your adapter → Edit IP assignment → set IPv6 to Off for a quick test, or uncheck Internet Protocol Version 6 in adapter properties. Reconnect VPN and verify no public IPv6 appears. macOS System Settings → Network → Details → TCP/IP → Configure IPv6 → Off (where available). On some versions use networksetup. Always retest WebRTC and IP tools after changes. Linux Disable IPv6 sysctl temporarily: sudo sysctl -w net.ipv6.conf.all.disable_ipv6=1 . Prefer VPN configs that add IPv6 blackhole routes. NetworkManager users should avoid profiles that restore IPv6 default routes. When not to disable IPv6 permanently If your network is IPv6-only or your VPN supports IPv6 end-to-end, keep IPv6 and ensure it is tunneled. Disabling is a containment tactic, not the only architecture. Verify After changes, confirm: VPN IPv4 only (or VPN IPv6), no ISP IPv6 on leak tests, and no local IPv6 in WebRTC. See also our IPv6 leak explainer . Protect yourself with AstraGuard VPN AstraGuard VPN helps keep DNS inside the tunnel with strong encryption, kill switch options, and simple setup on desktop and mobile. Create an account , pick a plan on packages , then verify on privacy tools .

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