EtherFast
®
Cable/DSL VPN Router with 4-Port 10/100 Switch
37
Instant Broadband
®
Series
Group
There are two Diffie-Hellman Groups to choose from: 768-bit and 1024-bit.
Diffie-Hellman refers to a cryptographic technique that uses public and private
keys for encryption and decryption.
Key Lifetime
In the Key Lifetime field, you may optionally select to have the key expire at the
end of a time period of your choosing. Enter the number of seconds you’d like
the key to be used until a re-key negotiation between each endpoint is completed.
Phase 2
Group
There are two Diffie-Hellman Groups to choose from: 768-bit and 1024-bit.
Diffie-Hellman refers to a cryptographic technique that uses public and private
keys for encryption and decryption.
Key Lifetime
In the Key Lifetime field, you may optionally select to have the key expire at the
end of a time period of your choosing. Enter the number of seconds you’d like
the key to be used until a re-key negotiation between each endpoint is completed.
Other Settings
NetBIOS broadcast
Check the box next to NetBIOS broadcast to enable NetBIOS traffic to pass
through the VPN tunnel.
Anti-replay
Check the box next to Anti-replay to enable the Anti-replay protection. This
feature keeps track of sequence numbers as packets arrive, ensuring security at
the IP packet-level.
Keep-Alive
Check the box next to Keep-Alive to re-establish the VPN tunnel connection
whenever it is dropped. Once the tunnel is initialized, this feature will keep the
tunnel connected for the specified amount of idle time.
Unauthorized IP Blocking
Check this box to block unauthorized IP addresses. Complete the on-screen
sentence to specify how many times IKE must fail before blocking that unau-
thorized IP address for a length of time that you specify (in seconds).
36
The Password screen, shown in Figure 6-23, allows you to change the password,
set SNMP Community names, and restore default settings on the Router.
Router Password You should set a password for the Router, unique for you
but that you will remember. When you first power up the Router, the default
Password setting is admin.
If you do not change the password, all users on your network will be able to
access the Router simply by entering the unit’s IP address into their web brows-
er’s location window and entering admin to access the Router.
If you select the Restore Factory Default option and click the Apply button,
you will clear all of the Router’s settings.
Do not restore the factory defaults unless you are having difficulties with the
Router and have exhausted all other troubleshooting measures. Once the Router
is reset, you will have to re-enter all of your configuration data.
Password
Figure 6-23
