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Filtered by: ipv4 Clear Filter

Using the Internet without IPv4 connectivity

news.ycombinator.com James Mcmurray 2025-08-22 22:23:40

Using the Internet without IPv4 connectivity A few days ago my ISP broke the IPv4 connectivity from my router after a power cut. Fortunately IPv6 connectivity still worked fine, but only a small fraction of websites were accessible. In this post I'll cover how Linux, WireGuard, and Hetzner came to the rescue - keeping the whole internet usable with only an IPv6 connection. Opinions expressed are solely my own and do not express the views or opinions of my employer. Background One morning I

Topics: docker ipv4 ipv6 nat wireguard
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Using the internet without IPv4 connectivity

news.ycombinator.com James Mcmurray 2025-08-23 03:23:40

Using the Internet without IPv4 connectivity A few days ago my ISP broke the IPv4 connectivity from my router after a power cut. Fortunately IPv6 connectivity still worked fine, but only a small fraction of websites were accessible. In this post I'll cover how Linux, WireGuard, and Hetzner came to the rescue - keeping the whole internet usable with only an IPv6 connection. Opinions expressed are solely my own and do not express the views or opinions of my employer. Background One morning I

Topics: docker ipv4 ipv6 nat wireguard
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Grokking NAT and packet mangling in Linux

news.ycombinator.com Unknown 2025-09-09 08:40:03

grokking NAT and packet mangling in linux Source: Imgur Imagine a house full of devices connected to your Wi-Fi network. From any device, try finding your public IP by visiting https://www.whatismyip.com/. The IPv4 address field should be the same for all devices. This is the IP provided by your Internet Service Provider (ISP) to your router, which acts as a gateway for your internet. So what's happening here? If the IPv4 address is the same, how is the router able to differentiate between th

Topics: address ip ipv4 nat network
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