Zhone 6238-I2 User Manual page 40

Enter a filter name, information about the source address (from the WAN
side), and information about the destination address (to the LAN side). Select
the protocol and WAN interface, then click on Save/Apply to add the setting.
You can view and delete the incoming filter settings from this screen.
MAC Filtering
MAC filtering can forward or block traffic by MAC address. You can change
the policy or add settings to the MAC filtering table using the MAC Filtering
Setup screen.
40 6238 Wi-Fi Router with VOIP User's Guide 6238-A2-ZB20-10