ZyXEL Communications 200 Series User Manual page 296

Chapter 13 Routing Protocols
• The packet's message-digest is the same as the one the ZyWALL calculates using the
MD5 password.
For RIP, authentication is not available in RIP version 1. In RIP version 2, you can only select
one authentication type for all interfaces. For OSPF, the ZyWALL supports a default
authentication type by area. If you want to use this default in an interface or virtual link, you
set the associated Authentication Type field to Same as Area. As a result, you only have to
update the authentication information for the area to update the authentication type used by
these interfaces and virtual links. Alternatively, you can override the default in any interface or
virtual link by selecting a specific authentication method. Please see the respective interface
sections for more information.
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ZyWALL USG 100/200 Series User's Guide