QUESTION 3cx Firewall Test IP addresses

[mrh]

Hi,

I'm trying to configure 3cx with our firewall, but for the voip ports I tend to restrict them to known ip addresses.

Does anyone know which ip addresses the 3cx servers use?

Many thanks,

 

[YiannisH]

Hello @mrh

The PBX will need to be able to contact downloads.3cx.com, activation.3cx.com, and if you are using a 3CX FQDN you will need to be able to contact letsencrypt.org for renewal of the certifications.
Also if you want to use webmeeting then you will need to allow the IP addresses that are populated in the IP blacklist located on the dashboard.

You can perform an nslookup for on these addresses and see that IPs of the servers you need to allow.


Please note that depending on your location you might need a different downloads server. There are currently 3, downloads-global.3cx.com, downloads-eu.3cx.com and downloads-us.3cx.com

 

[mrh]

Thank @YiannisH

They would be all the addresses to add as "Src Addr" in PFSense as shown below? (the first example only).

Thanks for your help