28 lines
No EOL
1,016 B
Markdown
28 lines
No EOL
1,016 B
Markdown
[⬅️ Back to `index`](index.md)
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# Initial connection
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When a client connect to a server, the server might output:
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```
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↙️ :server NOTICE * :Checking Ident
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↙️ :server NOTICE * :Looking up your hostname...
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↙️ :server NOTICE * :Couldn't find your hostname
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↙️ :server NOTICE * :No Ident response
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```
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What the server does is:
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1. Check the client's hostname (domain) via an rDNS lookup of the IP address.
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2. Try to connect to the client's [Ident server](https://en.wikipedia.org/wiki/Ident_protocol) (if it has one)
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And then most clients will send:
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```
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↗️ NICK nick
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↗️ USER nick 0 * :realname
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↗️ CAP LS 302
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```
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1. Set their nickname, server can show an error before connecting so the client can change the nickname before the connection is established.
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2. Set their username, modes (mostly unused by the IRCd), and real name
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> [!CAUTION]
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> Since the realname can have spaces in it, it must be prefixed with a colon.
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> For more info on colon prefixes, see [Colon Prefixing](prefixing.md) |