Question for 3cx / Google cloud experts. I have 3cx pbx working on google cloud server & it is Working perfectly.
I want to make my 3cx PBX more secure. I know my VOIP DID providers IP addresses & my all call traffic comes from only those servers. I want to make white list of only those IP address & block all other IP addresses on google cloud firewall level. I know 3cx itself having capability to blacklist IP addresses (software level) but I want to secure my google cloud virtual machine also from those threats. So please expert guide me how I can put the block IP addresses in Google cloud virtual machine firewall. & my google virtual machine interact with only specified server address else everybody not be allowed to connect with my 3CX virtual machine.
I want to make my 3cx PBX more secure. I know my VOIP DID providers IP addresses & my all call traffic comes from only those servers. I want to make white list of only those IP address & block all other IP addresses on google cloud firewall level. I know 3cx itself having capability to blacklist IP addresses (software level) but I want to secure my google cloud virtual machine also from those threats. So please expert guide me how I can put the block IP addresses in Google cloud virtual machine firewall. & my google virtual machine interact with only specified server address else everybody not be allowed to connect with my 3CX virtual machine.
