I am unable to access my node though the polkadot-ui if I attempt to set "--rpc-cors" to anything but "all".

Starting from scratch and without any "--rpc-cors" configured, when I attempt to access the node, in the log I get: "Blocked connection to WebSockets server from untrusted origin: Some("https://1.2.3.4:8080")"

Fine, so I add the following string and try again: "--rpc-cors "https://1.2.3.4:8080""

There's progress, I am now asked for a different cors string: "Blocked connection to WebSockets server with untrusted host: Some("1.2.3.4")"

I then add "1.2.3.4": "--rpc-cors "https://1.2.3.4:8080,1.2.3.4""

At which point I am getting the same exact error logged: "Blocked connection to WebSockets server with untrusted host: Some("1.2.3.4")"

I am accessing my Kusama node through a Wireguard VPN, where the node is behind a nginx instance. Locally (MacOS / Brave), I use the polkadot-ui interface hosted on IPFS (https://polkadot.js.org/apps/ipfs/).

Again, it is working perfectly fine with "--rpc-cors all". At this point I am simply trying to tie loose ends and make sure my security is as solid as it can be, ready for Polkadot.

Thanks.