On a WLAN, blacklist or whitelist can be configured to filter access from STAs based on specified rules. The blacklist or whitelist allows authorized STAs to connect to the WLAN and rejects access from unauthorized STAs.
Whitelist
A whitelist contains MAC addresses of STAs that are allowed to connect to a WLAN. After the whitelist function is enabled, only the STAs in the whitelist can connect to the WLAN, and access from other STAs is rejected.
Blacklist
A blacklist contains MAC addresses of STAs that are not allowed to connect to a WLAN. After the blacklist function is enabled, STAs in the blacklist cannot connect to the WLAN. Other STAs, however, can connect to the WLAN.
If the STA whitelist or blacklist function is enabled but the whitelist or blacklist is empty, all STAs can connect to the WLAN.
Figure 1 shows how STA blacklist and whitelist work.