Configuring Dual Stack Lite with Port Forwarding on IPv4

Installing and Using OpenWrt
1

Hi everyone, I am using a Cudy WR3000 v1 that runs 24.10.5. My ISP is providing a Dual Stack Lite connection with PPPoE.

I was able to install the DS-Lite package and setup the WAN PPPoE connection.
The WAN connection is creating WAN_6 Virtual dynamic interface (DHCPv6 client) and a WAN_6_4 Virtual dynamic interface (Dual-Stack Lite (RFC6333)).

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But as you can see the WAN_6_4 isn't receiving a proper IPv4 from the AFTR Gateway, which was happening on the ISP router.
There I could also see the available ports for forwarding on my connection.

Am I missing something in the configuration or is this simply not possible on OpenWRT?

Here is my /etc/config/network if needed

config interface 'WAN'
    option proto 'pppoe'
    option device 'wan.7'
    option username 'xxx'
    option password 'xxx'
    option ipv6 'auto'
    option metric '1'
    option norelease '1'

config device
    option name 'wan.7'
    option type '8021q'
    option ifname 'wan'
    option vid '7'
2

Just run miniupnpd to see if it detects outside IP address correctly....

3

Dual Stack Lite means that you don't have an externally accessible public IPv4 address, but share one with multiple other users. Generally this also implies that you can't configured any port forwardings (for IPv4) at all, but usually you can use IPv6 instead.

What brada4 is suggesting is worth a try, but not expected to work out - your ISP would have to quite out of their way to offer this potential option (and it only has a chance of working if only very few users share the same external IPv4 address, it's possible, but unlikely).