From the man page:
CONNECTIVITY SECTION
This section controls NetworkManager's optional connectivity checking
functionality. This allows NetworkManager to detect whether or not the
system can actually access the internet or whether it is behind a
captive portal.
uri
The URI of a web page to periodically request when connectivity is
being checked. This page should return the header
"X-NetworkManager-Status" with a value of "online". Alternatively,
it's body content should be set to "NetworkManager is online". The
body content check can be controlled by the response option. If
this option is blank or missing, connectivity checking is disabled.
By default on Fedora, the package NetworkManager-config-connectivity-fedora
puts that configuration into /usr/lib/NetworkManager/conf.d/20-connectivity-fedora.conf
. You can simply remove that package (although this won't guarantee that it won't come back). If you just edit that file, you may find that it reappears on upgrade. So, again from the man page:
If a default NetworkManager.conf
is provided by your distribution's
packages, you should not modify it, since your changes may get
overwritten by package updates. Instead, you can add additional .conf
files to the /etc/NetworkManager/conf.d
directory. These will be read
in order, with later files overriding earlier ones. Packages might
install further configuration snippets to
/usr/lib/NetworkManager/conf.d
. This directory is parsed first, even
before NetworkManager.conf
. Scripts can also put per-boot configuration
into /run/NetworkManager/conf.d
. This directory is parsed second, also
before NetworkManager.conf
. The loading of a file
/run/NetworkManager/conf.d/name.conf
can be prevented by adding a file
/etc/NetworkManager/conf.d/name.conf
. Likewise, a file
/usr/lib/NetworkManager/conf.d/name.conf
can be shadowed by putting a
file of the same name to either /etc/NetworkManager/conf.d
or
/run/NetworkManager/conf.d
.
So, what you need to do here is to simply
sudo touch /etc/NetworkManager/conf.d/20-connectivity-fedora.conf
which will create a blank file under the /etc
directory, overriding the default from /usr/lib
. This is a common pattern in many modern Linux applications — defaults shipped with packages go under /usr/lib
, and those can be overridden in /etc
.