this post was submitted on 19 Oct 2025
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Lemmy being pinged each midnight (lemmy.world)
submitted 1 week ago* (last edited 3 days ago) by removerpuzzlehunchback@lemmy.world to c/selfhosted@lemmy.world
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Hi all, I selfhost private instance of Lemmy for my friends behind Pangolin reverse proxy. I noticed something interesting in the logs; Lemmy specifically gets pinged / tried to access each midnight UTC from what looks like an IP from inside the network. Just out of curiosity, do you have any idea what that could be? I have federation off and private instance on, but maybe it is something from Lemmy network checking if my server is alive? Thank you in advance

Update: So it turns out I was perhaps correct with my hunch. The local IP turns out to be the proxy I set for ports 80 and 443 (it was internal Wireguard IP). Unfortunately my current setup did not allow me to catch which IP the request came from (which is a problem I have to solve later) but the lemmy-proxy container got requests for GET /.well-known/nodeinfo and GET /nodeinfo/2.1. So it is probably something checking my server, likely from the Lemmy network.

Update 2: So after I disabled Pangolin for one night, after I reenabled it, the requests do not come again! So the Lemmy network must have figured out that my instance is set to private and stopped pinging.

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[–] EarMaster@lemmy.world 3 points 1 week ago (1 children)

Is your server running on UTC? Depending on your location midnight UTC could also be 8 AM and it could be a user with a very regular morning schedule.

Only you can find out which machine is sending this request...

[–] removerpuzzlehunchback@lemmy.world 1 points 6 days ago* (last edited 6 days ago)

My timezone is CET, so I get the ping on 2AM. The Lemmy container should be on UTC as I did not specify the timezone when launching the container. It is definitely not human, as the ping comes exactly on midnight UTC, or seconds away from midnight. I will turn off the Pangolin auth and investigate further this midnight. Again sorry for not providing more information, I was certain that it is a thing internal to Lemmy and I was just curious what it is