Installation guide

MyPBX U5XX Administrator's Guide
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Figure B-11
4. Setup Proper Firewall Rules
Note: Please backup the configurations on backup and restore page before you
go ahead.In the case that you lock the device, you can reset to factory default
and restore the previous configurations.
Step1. Enable firewall on firewall page of MyPBX.
SystemFirewall Settings Firewall RulesGeneral Settings