@AJC01 you want IPsec site to site, or lan to lan as it is called in stand alone, It's pretty simple, make sure you have a public IP address on both routers, then go to page 153 in the manual. I...

@William_Wong you can't mirror a port with itself, choose one of the other ports

@Berg-UA Have you tried adding a picture, nothing is there?

@Balham look at this link, I have the same problem with an access point that is mounted outside, to prevent others from connecting to the cable I followed this guide...

@Daggett @Clive_A Unfortunately, I don't have many more tips to offer, seems like a case for TP-Link support.

@Daggett I use this firmware now but I have aslo used 1.2.2 and 1.2.3 with no truble. https://community.tp-link.com/en/business/forum/topic/718232