RUGGEDCOM ROX II
User Guide
Chapter 5
Setup and Configuration
Managing Message Digest Keys
535
6. Click
Exit Transaction
or continue making changes.
Section 5.21.10
Managing Message Digest Keys
Message digest keys use the MD5 algorithm to authenticate OSPF neighbors and prevent unauthorized routers
from joining the OSPF network. By enabling authentication and configuring a shared key on all the routers, only
routers which have the same authentication key will be able to send and receive advertisements within the OSPF
network.
An ID for each key allows the router to use multiple passwords and prevent replay attacks where OSPF packets
are captured, modified and transmitted to a router. To change passwords, simply create a new key and delete the
old key.
IMPORTANT!
The router can only share routing information with neighbors that use the same authentication method
and password.
NOTE
Authentication adds a small overhead due to the encryption of messages. It is not recommended for
completely private networks with controlled access.
The following sections describe how to configure and manage message digest keys:
•
Section 5.21.10.1, “Viewing a List of Message Digest Keys”
•
Section 5.21.10.2, “Adding a Message Digest Key”
•
Section 5.21.10.3, “Deleting a Message Digest Key”
Section 5.21.10.1
Viewing a List of Message Digest Keys
To view a list of message digest keys for an OSPF routing interface, navigate to
routing
»
dynamic
»
ospf
»
interface
»
{name}
»
message-digest-key
, where
{name}
is the name of the routing interface. If keys have been
configured, the
RMessage Digest
table appears.
Figure 619: Message Digest Table
If no message digest keys have been configured, add keys as needed. For more information, refer to
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