Forum Discussion

Copper Contributor

Oct 09, 2023

Defender Web Content filtering for Chrome/Firefox

Hello all, We have recently configured Web Content Filtering. I am struggling with finding what is required to have the setup effect on Chrome and Firefox, exactly as it is seen via Edge. Has ...

Magson

Copper Contributor

Oct 10, 2023

Hi,

Web Content filtering is the issue. Works very well. Other browsers, Chrome and Firefox in our case, are not being controlled by WCF.

So far, I have followed -

https://learn.microsoft.com/en-us/microsoft-365/security/defender-endpoint/web-content-filtering?view=o365-worldwide

I enabled Network Protection via Intune following this exactly -

https://learn.microsoft.com/en-us/microsoft-365/security/defender-endpoint/enable-network-protection?view=o365-worldwide#microsoft-intune

Defender is running in Passive - AMRunningMode : Passive Mode

Still no joy. have you any advice?

elieelkarkafi

MVP

Oct 10, 2023

create a custom config profile and add those keys to apply on your devices and set them to disable. Network protection does not currently support SSL inspection, which might result in some sites being allowed by web content filtering that would normally be blocked with chrome and firefox .

./Device/Vendor/MSFT/Defender/Configuration/DisableHttpParsing

./Device/Vendor/MSFT/Defender/Configuration/DisableDnsOverTcpParsing

Magson
Copper Contributor
Oct 10, 2023
Hello Elie,

Thank you for this.

I am just looking into this as I have never created one before.
- elieelkarkafi
  MVP
  Oct 10, 2023
  Magson Don't forget to turn on Network Protection and set it to Enable and to enable the below feature in MDE if your AV defender is running in passive mode
  - Magson
    Copper Contributor
    Oct 10, 2023
    Ah, so out Defender portal is managed externally, and i see this setting is turned off. Is this a 100% needed for it to work with Chrome/firefox?
    
    Also, IF the defender is not passive, with this option off, it should work?