You can use Strix Cloud’s Web Console with no problem through a usual proxy.
Communication between game clients and STRIX servers can’t use a usual proxy.
Accesses from the game clients to the master and room servers use a communication protocol that is different from web protocols such as http/https, and they can’t go through ordinary http/https-dedicated proxies. You will need a special proxy that transparently passes the TCP connections. It is recommended to use so-called “opening ports” technique instead if you need to access from behind a firewall.
If you choose WSS (Secure WebSocket) as the communication protocol, however, a relatively new proxy may be usable if it supports the wss protocol. Please consult your proxy’s specifications.