Servers and server outages

The Servers screen shows every server with how its sites are doing. On the Sites list, Group by server puts each site under its server, and the group header says "Server down" when all of a server's sites (two or more, not counting paused ones) are offline.

Add a server with + Add server on the Servers screen. Only the name is needed, but add its IP addresses (IPv4 and IPv6) too, so we can link sites to it for you. An address can belong to one server only.

A site gets its server in one of two ways, shown next to each site on the server:

1. Assigned by you. A server you pick for a site always wins.
2. DNS match. Otherwise we compare where the site's address points (its A and AAAA records) with your servers' IP addresses.

We look up a site's DNS when you add it and once a day. Saving a server links it straight away to the sites whose last looked-up addresses it has. When a site's DNS moves to an address none of your servers has, its DNS match goes away by itself. A site that points at two of your servers goes to the one you added first.

Sites behind Cloudflare can't be matched: their DNS shows Cloudflare's addresses, not your server's. Assign those yourself. You can pick the server of any site:

• when you add a site, in step 3;
• in the site's settings, under Server ("I don't know" drops your pick, and the daily match takes over again);
• on the Servers screen, in the list of sites without a server.

Deleting a server keeps its sites. They're checked as before, just without a server, until the daily DNS match finds another of your servers for them.

• Down: at least two sites that aren't paused, and all of them offline, like "Down since 14:02 · 3 sites offline".
• Needs attention (orange): some sites are offline, slower, block our checker or have an open problem, like "1 site offline · 2 need attention". A server whose only site is offline is orange too: one site isn't enough to blame the server.
• All sites online: every site we checked is up, with no open problems. Sites not checked yet don't count.
• All sites paused, Not checked yet or No sites yet when there's nothing to judge.