VOIP/SIP Best Practice For Ports

Pook

Hi Guys

Can anyone advise best practice for making sure all required ports are open for cloud hosted handsets? Obviously this is not a NAT rule so that leaves using the security policy section for allowing the ports and IP addresses of the service provider.

Really appreciate any feedback as to what others are doing, we are using Callswitch.

Zyxel_Judy

Hi @Pook ,

If your SIP server supports the SIP over NAT scenario, please go to Configure > Firewall > Firewall Setting > SIP ALG to enable SIP ALG and implement the configuration.

Note

SIP Signaling Port: If you are using a custom UDP port number (not 5060) for SIP traffic, enter it here.

Zyxel_Judy

Hi @Pook ,

Could you please let us know which model you want to configure for VoIP/SIP?

Pook

That would nelp, USG/ATP Flex Series using Nebula Cloud please.

Zyxel_Judy

Hi @Pook ,

If your SIP server supports the SIP over NAT scenario, please go to Configure > Firewall > Firewall Setting > SIP ALG to enable SIP ALG and implement the configuration.

Note

SIP Signaling Port: If you are using a custom UDP port number (not 5060) for SIP traffic, enter it here.