I have an unusual configuration for my services. I use CloudFlare externally and avoid it internally. A complete explanation of how I do this can be found here.
Recently I have configured IPv6 completely on my setup. After completing this I have started to have issues with logging in and I believe it is something to do with Keycloak and how the servers are connecting to it.
The working servers are
- Tandoor Recipes
- PGAdmin4
- BookStack
- Paperless-ngx
- Grafana
The failing servers are
- wiki.js
- Apache Guacamole
The issue seems to be something to do with my split DNS. If I remove split DNS, everything works fine. Would the issue be with Keycloak or is it possible both of those services are doing something weird with dns lookups?