MyPBX U100/U200 Administrator Guide
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Figure I-8
3.3* Security Configuration for remote extensions
If remote registration isn’t required, please disable it.
PBXExtensionsFXS/VoIP Extensions VoIP ExtensionsGeneralVoIP
Settings
Figure I-9
3.4 Set a robust password and enable IP restriction for extensions
1) Set a new extension password at a higher security level, e.g. AjK5Up1G.
PBXExtensionsFXS/VoIP Extensions VoIP ExtensionsGeneralPassword
Figure I-10
2) Enable IP restriction and enter the permitted “IP address/Subnet mask”, e.g.