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Is there a way to set firefox so it only allows access to only one website / (ip address).

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  • Last reply by daveada

daveada
daveada
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Is there a way to set firefox so it only allows access to only one website / (ip address) and block traffic from everything else (the entire web) other than the one site I want to allow? The site I want to allow is a corporate web application that will only work in firefox. We as a business run a windows server and all client desktops run Internet Explorer with security setting controlled by group policy. We have already locked down the security setting in firefox so users can’t bypass the proxy server settings.

Is there a way to set firefox so it only allows access to only one website / (ip address) and block traffic from everything else (the entire web) other than the one site I want to allow? The site I want to allow is a corporate web application that will only work in firefox. We as a business run a windows server and all client desktops run Internet Explorer with security setting controlled by group policy. We have already locked down the security setting in firefox so users can’t bypass the proxy server settings.

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cor-el
cor-el
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  • Top 10 Contributor
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Maybe use a PAC file and lock the connection settings in Firefox to use a PAC file.

Use a mozilla.cfg file in the Firefox program folder to lock prefs or specify new (default) values.

Place a file local-settings.js in the defaults\pref folder where you also find the file channel-prefs.js to specify using mozilla.cfg. 

pref("general.config.filename", "mozilla.cfg");

These functions can be used in the mozilla.cfg file: 

defaultPref();  // set new default value
pref();         // set pref, but allow changes in current session
lockPref();     // lock pref, disallow changes

See:

daveada
daveada Question owner
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I have a proxy server set up (Symantec.cloud). Fire fox is “locked” so users would find it difficult to bypass it.

I have a file: local-settings.js This is located in: C:\Program Files (x86)\Mozilla Firefox\defaults\pref The content of this file is:

pref("general.config.obscure_value", 0); // only needed if you do not want to obscure the content with ROT-13 

pref("general.config.filename", "mozilla.cfg");

I also have the file: called: mozilla.cfg This is located: C:\Program Files (x86)\Mozilla Firefox The contents of this file is:

// 

lockPref("network.proxy.type", 5);

All that is working fine, users can’t easily change the connection settings. So all that is good and works…

What I would also like to do is set firefox so access is limited to 1 IP address and nothing else is allowed (the whole internet is blocked, except this one IP address). You suggest using a PAC file - I was unsure how I would use a PAC file, (I have never written one) and do not understand how I would implement one? Please help.

Modified by daveada