Adobe has now shutdown the Flash player but I have hardware tools that use a flash run html UI on my centos desktop machine.
The workaround is to stop the flash player calling home by changing the ip addresses on the mms.cfg file.
I have scanned by centos 7.9 machine for this file without finding it.
Below explains the procedure that I have applied successfully to other OSs.
Does anyone have an idea where I can find the necessary config file?
In this case, the browser plug-in is installed and is executing an end-of-life status page to show
the Adobe Flash Player error. A configuration can be edited on this client to allow the Adobe
Flash Player to run UI code from specified servers.
1. Do not uninstall the Adobe Flash Player. Removing Adobe Flash Player will cause the UI
to become inaccessible.
2. Do not update the browser. Most browsers will automatically update, and automatic
updates need to be turned off. Updating to a new browser version will cause the UI to
3. Edit the mms.cfg file on the client computer. Location of the mms.cfg file:
Firefox and Pale Moon
Windows 64-bit: %WINDIR%\SysWow64\Macromed\Flash\
Windows 32-bit: %WINDIR%\System32\Macromed\Flash\
macOS: /Library/Application Support/Macromedia/
Windows: %LOCALAPPDATA%\Google\Chrome\User Data\Default\Pepper
Linux: ~/.config/google-chrome/Default/Pepper Data/Shockwave Flash/System/
macOS: ~/Library/Application Support/Google/Chrome/Default/Pepper
%LOCALAPPDATA%\Microsoft\Edge\User Data\Default\Pepper Data\Shockwave
Windows: %LOCALAPPDATA%\Chromium\User Data\Default\Pepper Data\Shockwave
Linux: ~/.config/chromium/Default/Pepper Data/Shockwave Flash/System/
macOS: ~/Library/Application Support/Chromium/Default/Pepper Data/Shockwave
4. This file should have the following content after the edit is complete:
AllowListUrlPattern=*://<first Device IP>/
AllowListUrlPattern=*://<second Device IP>/
Note: Each IP address is that of an appliance
Note: Multiple appliances can be listed, each on a separate line
Note: User may have to open this file for editing as an ADMINISTRATOR. For example,
on Windows they can run Notepad as an administrator in order to change and
save to mms.cfg file