Draytek Vigor2120n-plus User Manual page 249

Administration Message
After finishing all the settings, please click OK to save the configuration.
from clients on LAN when router's DNS server is used.
DNS Filter - Check Enable to enable such feature.
Syslog - The filtering result can be recorded according to
the setting selected for Syslog.

None – There is no log file will be recorded for this
profile.

Pass – Only the log about Pass will be recorded in
Syslog.

Block – Only the log about Block will be recorded in
Syslog.

All – All the actions (Pass and Block) will be recorded
in Syslog.
WCF- Set the filtering conditions.
UCF - Set the filtering conditions.
Type the words or sentences which will be displayed when
a web page is blocked by Vigor router. You can type the
message manually for your necessity or click Default
Message button to get the default text displayed on the field
of Administration Message.
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Vigor2120 Series User's Guide