Hi good people. I have a Asus AX88U and I wanted to enable Web access from WAN. I do it, and after a while it is turned off. I have skynet installed as well. Firmware: 384.16 Certificate is set up with https.
There's a reason for that, as it's not safe to do so. Do NOT enable WAN access, you'll regret it as many have experienced already.
If you need to access your home network remotely setup a VPN or use the Instant Guard app provided by ASUS (which uses an IPSEC VPN connection, albeit it slower in general).