EDR: App Control Integration Fails with "The server is not accessible"

[#1]

Environment

• EDR: All Versions
• AppC: All Versions

Symptoms

When saving the settings for Application Control integation, a message appears "The server is not accessible" 

Cause

Traffic to 443 is being blocked for the EDR server IP or address is incorrectly entered

Resolution

1. Make sure the Address does not contain https://, it should only be the FQDN address. Example: myserver.mydomain.com. If the error continues, proceed to step 2
2. Run the following command to verify the server can properly resolve the FQDN

   nslookup myserver.mydomain.com

3. Run this command to confirm the port is not being filtered by a firewall on the AppC server side or in-between. If it comes back as "filtered" the port is being blocked for the EDR server IP.

   nmap -Pn -p 443 myserver.mydomain.com

   Filtered by Firewall:
   
       PORT STATE SERVICE
       443/tcp filtered https
   
   Not filtered:
   
       PORT STATE SERVICE
       443/tcp open https