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Table Of Contents
Configuration | System | Servers | DNS
Servers
Configuring servers means identifying DNS servers to the VPN 3002 so it can communicate with them correctly. DNS servers convert hostnames to IP addresses. The VPN 3002 functions as a client of these servers.
This section of the Manager lets you configure the VPN 3002 to communicate with DNS servers.
Configuration | System | Servers | DNS
This screen lets you configure the Domain Name System (DNS) servers for the VPN 3002. DNS servers convert domain names to IP addresses. Configuring DNS servers here lets you enter hostnames (for example, mail01) rather than IP addresses as you configure and manage the VPN 3002.
You can configure up to three DNS servers that the system queries in order.
Note
DNS information that you add here is for the VPN 3002 only. PCs located behind the VPN 3002 on the private network get DNS information that is configured on the central-site VPN Concentrator in the Group settings for the VPN 3002.
Enabled
To use DNS functions, check Enabled (the default). To disable DNS, clear the box.
Domain
Enter the name of the registered domain of the ISP for the VPN 3002; for example,
yourisp.com. Maximum 48 characters. This entry is sometimes called the domain name suffix or sub-domain. The DNS system within the VPN 3002 automatically appends this domain name to hostnames before sending them to a DNS server for resolution.Primary DNS Server
Enter the IP address of the primary DNS server, using dotted decimal notation; for example, 192.168.12.34. Be sure this entry is correct to avoid DNS resolution delays.
Secondary DNS Server
Enter the IP address of the secondary (first backup) DNS server, using dotted decimal notation. If the primary DNS server does not respond to a query within the Timeout Period specified below, the system queries this server.
Tertiary DNS Server
Enter the IP address of the tertiary (second backup) DNS server, using dotted decimal notation. If the secondary DNS server does not respond to a query within the Timeout Period specified below, the system queries this server.
Timeout Period
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.
Posted: Tue Apr 19 12:46:02 PDT 2005
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