@john9527 , thanks for the excellent firmware. Until a week ago I was still using Merlin's latest 384.6 (AC56U) firmware which was working perfectly, but since it is no longer maintained, I was looking for alternatives to keep my old AC56U up to date with the latest security updates. I am glad I found yours!
Now, I have this problem - I don't know if it's related to V42E7 firmware (since it's my first time using this fork) but while connected to my own wifi, if I try to connect an openvpn server, I get no internet connection; the VPN client tells me I'm connected with the vpn server, but that's it - I cannot access neither the internet, nor the private network (where the vpn server is). I've tried to reset my AC56U to factory settings, to disable firewall, the same result... If I use my phone's hotspot, everything works. If I use my neighbour's wifi (which has the same ISP), still works. If I try the other way - to connect from outside to my own openvpn server running on AC56u (ie: using mobile hotspot), things are working (so my ISP is not blocking VPN connections). If I use some 3rd party VPNs (ie: nord vpn) while on wifi, again, everything is working. I don't know where to dig. What else could I try?