Self Hosted - Self-hosting your services.

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A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.

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[Question] Same domain for all federated services (lemmy.ml)

submitted 1 year ago* (last edited 1 year ago) by youtopia@lemmy.ml to c/selfhost@lemmy.ml

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I’m interested in setting up my own instances for Lemmy, Mastodon, and Matrix.

Can I use the same https://domain.tld for all of them without any subdomains?

For example:
lemmyuser@mydomain.tld
mastodonuser@mydomain.tld
matrixuser@mydomain.tld

Will this work across all of my self-hosted instances, or do I need to append a subdomain for each, e.g., lemmyuser@lemmy.mydomain.tld?

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[–] makr_alland@lemmy.world 1 points 1 year ago

All those services use a protocol named WebFinger that allows for having the servers in different domains but showing the users as being in a main domain. For example, my self-hosted Synapse server is at matrix.domain.tld, but my users are all like user@domain.tld.

Unfortunately I don't really know how to set it all up manually, I just let Yumohost take care of managing it.

[–] poVoq@slrpnk.net 1 points 1 year ago

Matrix (or even easier XMPP) can coexist on the same domain with Lemmy or Mastodon, but with two ActivityPub services that is AFAIK not possible.

[–] GNUmer@sopuli.xyz 1 points 1 year ago* (last edited 1 year ago)

Regardless of configuration, you still need to access the instance from mastodon.mydomain.tld or lemmy.mydomain.tld, but you can configure the Mastodon to use @mastodonuser@mydomain.tld as its identifier by setting WEB_DOMAIN to mydomain.tld.

Mastodon documentation on the topic: https://docs.joinmastodon.org/admin/config/#web_domain