this post was submitted on 29 Aug 2025
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Docker docs:

Docker routes container traffic in the nat table, which means that packets are diverted before it reaches the INPUT and OUTPUT chains that ufw uses. Packets are routed before the firewall rules can be applied, effectively ignoring your firewall configuration.

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[–] Static_Rocket@lemmy.world 102 points 1 year ago (3 children)

This was a large part of the reason I switched to rootless podman for everything

[–] False@lemmy.world 19 points 1 year ago (2 children)

Explicitly binding certain ports to the container has a similar effect, no?

[–] doughless@lemmy.world 8 points 1 year ago (1 children)

I still need to allow the ports in my firewall when using podman, even when I bind to 0.0.0.0.

[–] qaz@lemmy.world 3 points 1 year ago (2 children)

Also when using a rootfull Podman socket?

[–] doughless@lemmy.world 4 points 1 year ago

I haven't tried rootful since I haven't had issues with rootless. I'll have to check on that and get back to you.

[–] doughless@lemmy.world 3 points 1 year ago (1 children)

When running as root, I did not need to add the firewall rule.

[–] qaz@lemmy.world 2 points 1 year ago

Thanks for checking

[–] Static_Rocket@lemmy.world 2 points 1 year ago

It's better than nothing but I hate the additional logs that came from it constantly fighting firewalld.

[–] Kr4u7@discuss.tchncs.de 8 points 1 year ago (3 children)

My problem with podman is the incompatibility with portainer :(

Any recommendations?

[–] slate@sh.itjust.works 13 points 1 year ago (1 children)

CLI and Quadlet? /s but seriously, that's what I use lol

[–] chunkystyles@sopuli.xyz 5 points 1 year ago

Quadlets are so nice.

[–] giacomo@lemmy.dbzer0.com 12 points 1 year ago (1 children)

cockpit has a podman/container extension you might like.

[–] qaz@lemmy.world 6 points 1 year ago* (last edited 1 year ago) (1 children)

It's okay for simple things, but too simple for anything beyond that, IMO. One important issue is that unlike with Portainer you can't edit the container in any way without deleting it and configuring it again, which is quite annoying if you just want to change 1 environment variable (GH Issue). Perhaps they will add a quadlet config tool to cockpit sometime in the future.

[–] giacomo@lemmy.dbzer0.com 6 points 1 year ago

i mean, you can just redeploy the container with the updated variable. thats kinda how they work.

[–] Guilvareux@feddit.uk 3 points 1 year ago (1 children)

I assume portainer communicates via the docker socket? If so, couldn’t you just point portainer to the podman socket?

This is the way.