privacy

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Who can see my IP on Lemmy? (lemmy.ca)

submitted 1 year ago by [email protected] to c/[email protected]

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Looked through the docs a bit and it's not really clear to me: I'm posting this on lemmy.ca, does that mean only that instance knows my IP? Or does every instance it federates with get my ip alongside this post?

This seems maybe important, did I miss a privacy guide to Lemmy someplace? Cursory searching didn't come up with much official. Are there other aspects we should be thinking about here? I'd come across some mention of deleted posts being still available everywhere they were sent but that sorta makes sense -- hard to "unpublish" anything.

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[–] [email protected] 2 points 1 year ago

I gave a cursory look at the source code.

The database schema doesn't have columns for IP addresses anywhere, but notably not on users or posts.
The only place I see IP addresses in the code is for rate limiting and it doesn't appear to be logged here.
However, the default nginx configuration that reverse-proxies to Lemmy uses access logs that include the IP address.

So, from what I can tell, nobody can see your IP address through Lemmy. But the person who runs the server that your Lemmy instance runs on can trace IPs by looking at access logs. That doesn't get shared with other servers, or even people who adminster your Lemmy instance but don't have access to the underlying server.