AVer SF2111H-BR user manual - Manual (Page 47)

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System > Advance > Access list
You can deny an IP address or a range of IP address so that they cannot access the IP camera. Tick
the "enable" box, key in the IP address you want to deny, select" deny" then click "Add" to add it to the
list. You can also choose to deny a range of IP address but allow one or several IP address of them.
Take the picture above for example, IP address192.168.50.151~161 is not allowed to connect to the
camera, but only 192.168.50.159 can access. Note: In the list "allow" condition must be ranked before
"deny" condition. For example, if we exchange the sequence, set "Deny:
192.168.50.151~192.168.50.161" for the first item and "Allow: 192.168.50.159" for the second item in
the list, the IP "192.168.50.159" turns out to be denied by the camera because the "deny" condition
has the priority according to our ranking way.