Tenda D820R User Manual page 32

 Bimap Rule：
performs address
translations in both the
outgoing and incoming
directions
RDR Rule：The

RDR rule flavor allows
you to make a
computer on your LAN,
such as a Web or FTP
server, available to
Internet users
without having to
obtain a public IP
address for that
computer. The
computer's private IP
address is translated
to your public IP
address in all
incoming and outgoing
data packets.
 Pass Rule：
allow a range of IP
addresses to remain
untranslated even
when another rule is
D820R ADSL2+ Router User Guide
26