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| #!/bin/bash | |
| # | |
| # This assumes you are using "Chrome" from the official Google site via the .deb or .rpm | |
| # This may or may not work with your distributions "Chromium" or "Chrome" package! | |
| # | |
| # Run this script then restart Chrome, you will see it is no longer bound to UDP:5353 | |
| # | |
| mkdir -p /etc/opt/chrome/policies/{managed,recommended} || echo FAIL, ARE YOU ROOT | |
| chmod go-w /etc/opt/chrome/policies/managed || echo FAIL, ARE YOU ROOT | |
| cat > /etc/opt/chrome/policies/managed/managed_policy.json << 'EOF' | |
| { "EnableMediaRouter": false } | |
| EOF | |
| # | |
| # UPDATE: Unfortunately, there is another option that must be set as of latest versions of Chrome | |
| # stable. It can not be set in the policy file but must be set manually in chrome://flags. Without | |
| # this additional change, Chrome will still spam IGMP group requests on all interfaces at boot-time | |
| # | |
| # The flag is: #enable-webrtc-hide-local-ips-with-mdns | |
| # It must be set to 'Disabled' | |
| # |
You can try setting the immutable flag on the configuration file after you modify it. You’ll need elevated privileges to do so, though
The simplest way to do a basic test would be to shut down all chrome instances, make the change, then sudo chattr +i . Until you chattr -i the file, it won’t be mutable by any users (not even root)
The file has to be on an ext-based file system because it uses the extfs extended attributes
You could also try just chowning it to root, but it’s possible it could be deleted and recreated as a normal user since the directory will be owned by a normal user
good luck, let me know if you figure anything out. I stopped using Chrome entirely a while ago so haven’t looked at it all on probably over a year
BTW- there are probably extensions that can disable the mDNS- but a pure configuration change is so much better than adding more code to your system- even if it is (mostly) sandboxed
The #enable-webrtc-hide-local-ips-with-mdns flag no longer showed up for me on chrome 87.0.4280.88. Enabling the flag #temporary-unexpire-flags-m85 showed this flag again but after finally setting #enable-webrtc-hide-local-ips-with-mdns to Disabled, the mDNS entries reappeared again after a while as others mentioned.