alt Hacker News> IPv6 supports NAT
You say that, but in practice it does not.
My consumer router, and every router I have configured, implicitly supports IPv4 NAT out of the box. But it will never NAT an IPv6 network. If I enable IPv6 then it operates by IPv6 rules, which means each device gets a Network ID and each Network ID gets routed directly and transparently. The router has no NAT table and no NAT settings for this protocol.
So if NAT is “supported” whatever that means, it simply isn’t possible for most end-users.
Replies
shibapuppie • last Sunday at 4:46 AM
IPv6 DOES support NAT.
If you've got a car that can't go 100, that doesn't mean nobody can, or that it doesn't exist. I don't care if you can't do it, it IS supported in the spec.
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Consumer routers don't support lots of useful stuff though, so them not supporting NAT66 isn't very surprising. Enthusiasts are likely to use OpenWRT or nftables, both of which support NAT66 [0], and quickly Googling some random enterprise routers shows that they all support NAT66 too [1] [2] [3].
This isn't enabled by default because it's usually a bad idea, but it's certainly possible if you really want. (It's discouraged because NAT in general is a bad idea, but it's no worse with IPv6 than with IPv4; the only difference being that IPv4 effectively requires NAT.)
[0]: https://openwrt.org/docs/guide-user/network/ipv6/ipv6.nat6
[1]: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_nat...
[2]: https://www.animmouse.com/p/how-to-nat-ipv6-in-mikrotik/
[3]: https://www.juniper.net/documentation/us/en/software/junos/i...