SurrealDB behind Traefik proxy

[jevontech]

I am planning to expose a SurrealDB instance in Docker to the Internet using HTTPS.
My plan is to use Traefik proxy for this (as I am already using this to expose other HTTP services to the Internet).
If I access the SurrealDB instance directly using Curl (for example the /version endpoint) , I get a proper reply.
When I try to access SurrealDB through Traefik (TLS enabled, certificate via Let's Encrypt), the request seems to be stuck somehow and I never get a reply. I increased the loglevel of SurrealDB and I see the request reaching SurrealDB and a reply being sent. But this reply never reaches the original client (Curl in this case).
Other HTTP services exposed via Traefik work fine.

Do you have any ideas on how to solve this issue ?

[jevontech]

It seems to be an issue with the firewall in front of Traefik , instead of Traefik itself.