Solved Servers used by 3CX?

[CyberAndy]

Dear all,

my updates or registrations often fail because apparently the certificates of the servers used by 3CX don't match the hostnames or IPs.
My firewall checks these and I need to add exceptions for the SSL decryption.
Is there a list of all IPs used by 3CX available so I can whitelist all of them?

Regards,
Andreas

 

[Zacharias_3CX]

Hello @CyberAndy

The required IPs that your PBX must always have access to are the IPs of the below domains:

activation.3cx.com

downloads.3cx.com

For 3CX FQDN you will need access to letsencrypt.com

For Webmeeting service I am attaching you a list of all DNS nodes. Be sure that you allow webmeeting.3cx.net and at lease three other nodes.

when the firewall checker is running the system is looking for the IP's of stun.3cx.com, stun2.3cx.com, stun3.3cx.com

You can find the IP's of the specific hosts by doing an nslookup from the machine that the server is running.

 

[CyberAndy]

Hello Zacharias,

thanks a lot, that's what I needed to know.

Regards,
Andreas