CA setup

Hi,

XG is performing a man in the middle attack to inspect HTTPs traffic.

It is common practice to do this kind of attack.

In this case the client does not like to have a man in the middle. So he informs the user, there is something odd - This is your untrusted website. 

Now chrome access the windows cert store. Do you installed it as a trusted root ca? and which ca did you use? 

Yes I did it trusted default sophos CA.

Hi,

Which one?

There are 2 CAs on XG. Default and SSL. You use SSL for the SSL Decryption. 

yes ssl one .

At the user's windows we need to login xg firewall page and down the certificate then add it in trusted root .

can we push this activity from remotely ?

Thanks

Hi, check out this post:

https://community.sophos.com/products/unified-threat-management/f/web-server-security/79641/howto-let-s-encrypt/381075#381075

Install the UTM-generated SSL certificate into your systems.  Like this: https://community.sophos.com/kb/en-us/115315#How%20to%20deploy%20the%20Proxy%20CA - note that using the Active Directory deployment method doesn't cover Firefox because years ago Firefox divorced it's certificate management from Windows and there is no "easy" way to deploy that certificate on a mass scale - unless someone has access to GPO templates that include the Firefox certificate store since the last time I looked for some.

The steps in that article are a bit light on how to do that AD import, but this article for their web gateway applies https://community.sophos.com/kb/en-us/42153#GPMC - just use the cert you download from the AD step in the previous article in step 8 from this link to the "Installing the CA with Group Policy Using the Group Policy Management Console (GPMC)" procedure.

My installation only has one certificate, the default. Home do I get the other?

Can you post a screenshot please? 

Here is the screen shot:

This is your appliance certificate.

You need to import the CA (Certificate Authority) 

Ok how do I import the certificate authority?

Simple download it and upload it to the clients.

You will find more details here:

https://community.sophos.com/kb/en-us/123048

Dear ,

We go with

CA with Group Policy Using the Group Policy Management Console (GPMC).

we install and follow all provided steps.

1. our company's default browser is chrome GPMC can push to chrome ?

after that when we check on client computer following error occur.

Dear ,

We go with

CA with Group Policy Using the Group Policy Management Console (GPMC).

we install and follow all provided steps.

1. our company's default browser is chrome GPMC can push to chrome ?

after that when we check on client computer following error occur.

Hi,

Chrome uses the system cert store. Should work fine.

Can you show us your GPO? 

yes sure please let me know which screen you want to view ?

In which point did you push the CA to the client? 

And which CA did you use?

using default ca