5 Servers
5-16 VPN 3000 Concentrator Series User Guide

Time out P erio d

Enter the initial time in seconds to wait for a response to a DNS query before sending the query to the
next server. Minimum is 1, default is 2, maximum is 30 seconds. This time doubles with each retry cycle
through the list of servers.

Timeout Retries

Enter the number of times to retry sending a DNS query to the configured servers, in order. In other
words, this is the number of times to cycle through the list of servers before returning an error. Minimum
is 0, default is 2, maximum is 10 retries.
Apply / Cancel
To apply your settings for DNS servers and include the settings in the active configuration, click Apply.
The Manager returns to the Configuration | System | Servers screen.
Reminder: To save the active configuration and make it the boot configuration, click the Save Needed icon at the
top of the Manager window.
To discard your settings, click Cancel. The Manager returns to the Configuration | System | Servers screen.
Configuration | System | Servers | DHCP
This section of the Manager lets you configure Dynamic Host Configuration Protocol (DHCP) servers
that assign IP addresses to clients as a VPN tunnel is established.
If you check Use DHCP on the Configuration | System | Address Management | Assignment screen, you must
configure at least one DHCP server here. You should also configure global DHCP parameters on the
Configuration | System | IP Routing | DHCP screen; click the highlighted link to go there. The DHCP system
within the VPN Concentrator is enabled by default on that screen.
You can configure and prioritize up to three DHCP servers. The first server is the primary, and the rest
are backup servers in case the primary is inoperative.