diff options
| author | 0x4A6F <0x4A6F@users.noreply.github.com> | 2020-09-30 21:21:23 +0000 |
|---|---|---|
| committer | 0x4A6F <0x4A6F@users.noreply.github.com> | 2020-10-01 22:06:00 +0000 |
| commit | c232d4b587b2b9521c549c06ba93fdb45630106a (patch) | |
| tree | df91513706ce8fc078b8864fc1305690f8cd9f5a /nixos/modules/tasks | |
| parent | b3f8d3b80dd23bda34fae767bd63f1eaea54e164 (diff) | |
nixos: Conform with RFC 1123 in networking.hostName
Conform to RFC 1123 [0], specifically to "2.1 Host Names and Numbers",
which allow starting host name with alphanumerical instead of alphabetical characters.
RFC 1123 updates RFC 952 [1], which is referenced in "man 5 hosts".
[0]: https://tools.ietf.org/html/rfc1123
[1]: https://tools.ietf.org/html/rfc952
Diffstat (limited to 'nixos/modules/tasks')
| -rw-r--r-- | nixos/modules/tasks/network-interfaces.nix | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/nixos/modules/tasks/network-interfaces.nix b/nixos/modules/tasks/network-interfaces.nix index 9ff2326db1fe..b956f49c036c 100644 --- a/nixos/modules/tasks/network-interfaces.nix +++ b/nixos/modules/tasks/network-interfaces.nix @@ -381,13 +381,14 @@ in # syntax). Note: We also allow underscores for compatibility/legacy # reasons (as undocumented feature): type = types.strMatching - "^$|^[[:alpha:]]([[:alnum:]_-]{0,61}[[:alnum:]])?$"; + "^$|^[[:alnum:]]([[:alnum:]_-]{0,61}[[:alnum:]])?$"; description = '' The name of the machine. Leave it empty if you want to obtain it from a DHCP server (if using DHCP). The hostname must be a valid DNS label (see - RFC 1035 section 2.3.1: "Preferred name syntax") and as such must not - contain the domain part. This means that the hostname must start with a - letter, end with a letter or digit, and have as interior characters only + RFC 1035 section 2.3.1: "Preferred name syntax", RFC 1123 section 2.1: + "Host Names and Numbers") and as such must not contain the domain part. + This means that the hostname must start with a letter or digit, + end with a letter or digit, and have as interior characters only letters, digits, and hyphen. The maximum length is 63 characters. Additionally it is recommended to only use lower-case characters. ''; |