[FS#3225] ipv6 npt does not work

[OpenWrt Bugs]

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The following task has a new comment added:

FS#3225 - ipv6 npt does not work
User who did this - Luiz Angelo Daros de Luca (luizluca)

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NPT is mostly useless for OpenWrt as it breaks conntrack. The result is that you'll have a stateless firewall. It would only be useful if you have a firewall before or after the router with NPT.

The reason for that is when you use conntrack, you could simply use NETMAP as most of its costs are [[https://unix.stackexchange.com/questions/331224/is-there-a-way-to-have-nptv6-with-connection-tracking-on-linux|already paid]].

I do suggest you to use NETMAP instead of MASQUERADE.
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More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=3225#comment8938

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