Zhone 6211-I3 User Manual page 51

NAT
You can select a Service or make new one. Enter the Server IP Address, then
click on Save/Apply to submit your configuration.
Figure 36: Virtual Server Add Screen
On this screen you can view and delete servers. Click in the check box under
Remove and click on the Remove button to delete selected virtual servers.
Figure 37: Removing Selected Virtual Servers
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6211-I3 ADSL2+ Router User's Guide