[Question] Prowlarr + podman + cloudflare protected indexers

[pushrbx]

Should the following be added to the troubleshooting guide of prowlarr? Or is this too much of a niche use case to be added to the wiki?

The most recent version of podman as of writing is v5.7.1. In this version prowlarr stopped working for me with cloudflare protected indexers.
The symptoms were:

• Non-cloudflare protected websites worked from the default container network
• DNS resolution worked ok inside the container
• HTTP requests to Cloudflare protected indexers timed out inside the container

I've found that the CNI bridge of podman doesn't inherit the MTU, and it defaults to 1500, where as cloudflare edge servers have some sort of optimisation which requires an MTU of 1460. Creating a new container network with podman network create --opt mtu=1460 servarr then recreating the prowlarr container to use that network fixed the issue.