Hi there,

Apologies for my English, non mother tongue here :)

I've a OC200 that manage devices across two different sites (Site A and Site B) connected to each other with the Internet

Each site has pretty much the same setup: ISP modem/gateway --> TP-Link gateway (behind ISP nat) --> TP-Link Switch --> APs and servers.

OC200 is located in Site A where I opened port 29810-29814 in both the ISP modem/gateway and the TP-Link gateway in order to adopt the devices in Site B via Controller Inform URL (as shown here https://www.tp-link.com/no/support/faq/3087/).

Devices in Site B were adopted with no problem but every time I try to update them I get the same error:

Failed to upgrade Router to firmware version 2.0.0 Build 20220106 Rel.56391 online. Please check your network configuration and make sure the device can access the Controller's HTTPS management port.

It seems I'm missing some port forwarding, maybe port 443 (as shown in https://community.tp-link.com/en/business/kb/detail/362?page=2)?

Unfortunately port 443 it's already been use by one of my web server. If this is the issue, can I change that specific port in the Controller and use another one? How?

Many thanks in advance!