HOSTS.CONF(5) NUT Manual HOSTS.CONF(5)

hosts.conf - Access control for Network UPS Tools CGI programs

The CGI programs (upsset.cgi(8), upsstats.cgi(8), upsimage.cgi(8)) use this file to determine if they are allowed to talk to a host. This keeps random visitors from using your web server to annoy others by creating outgoing connections.

•Contents of this file should be pure ASCII (character codes not in range would be ignored with a warning message).
•This file does not contain passwords. Read-only monitoring in NUT is anonymous, and the upsset(8) program asks for credentials in the browser session when commanding a particular UPS (web-server should be secured, as reported to the program by upsset.conf(5) file).

MONITOR ups description

The ups element is in the form upsname[@hostname[:port]].

To allow connections to an UPS called "snoopy" on a system called "doghouse" that runs upsd on port 7877, it would look like this:

MONITOR snoopy@doghouse:7877 "Joe Cool"

The description must be one element, so if it has spaces, then it must be wrapped with quotes as shown above. The default hostname is "localhost".

CUSTOM_TEMPLATE_LIST filename, CUSTOM_TEMPLATE_SINGLE filename

upsstats(8) allows to use custom HTML template files for some of its outputs (JSON and "treemode" mark-ups are currently hard-coded in the binary), which you can specify in the query string part of the URI (in your index.html and/or added cells of header.html) as e.g.
.../cgi-bin/upsstats.cgi?template_single=custom-s.htm&template_list=custom-l.htm

+ Specific file names for a specific role must be permitted with these directives (can be repeated). File names must contain the .htm sub-string and must be located directly in the NUT configuration directory (same as default templates). If custom templates are used in the original request URI, they will be automatically suffixed to generated links (primarily HOSTLINK, but also just in case added to TREELINK and TREELINK_JSON, see upsstats.html(5) for more details).

upsset.cgi(8), upsstats.cgi(8), upsimage.cgi(8)

The NUT (Network UPS Tools) home page: https://www.networkupstools.org/historic/v2.8.5/

04/07/2026 Network UPS Tools 2.8.5