Sitecom WL-351 User Manual page 39

Access
You can restrict users from accessing certain Internet applications/services
(e.g. Internet websites, email, FTP etc.), Access Control allows users to define
the traffic type permitted in your LAN. You can control which PC client can
have access to these services.
Deny If you select "Deny" then all clients will be allowed to access Internet
accept for the clients in the list below.
Allow If you select "Allow" then all clients will be denied to access Internet
accept for the PCs in the list below.
Filter client PCs by IP Fill in "IP Filtering Table" to filter PC clients by IP.
Add PC You can click Add PC to add an access control rule for users by IP
addresses.
Remove PC If you want to remove some PCs from the "IP Filtering Table",
select the PC you want to remove in the table and then click "Delete
Selected". If you want to remove all PCs from the table, just click the "Delete
All" button.