Black Box LRA005A-R2, LRS002A-R2, LRA001A-R2 manual Bits, IP Subnet Mask Default Values by Class

ASYNC ROUTER AR-P, AR-5, AND SYNC ROUTER USER’S MANUAL

•IP subnet mask—Enter the subnet mask desired, in decimal dotted-quad notation. The subnet mask defaults to all ones for the network portion and all zeroes for the host portion, which corresponds to the class of IP address entered. Typical subnet masks are specified in Table 5-1, in decimal dotted- quad notation and bits notation.

Bits notation represents the number of contiguous high-order bits with a value of one that define the subnet portion of an IP address.

Table 5-1. IP Subnet Mask Default Values by Class.

IP Address	Class	Subnet Mask	Bits
10.0.0.1	A	255.0.0.0	8
128.66.2.1	B	255.255.0.0	16
192.0.2.1	C	255.255.255.0	24

•Syslog IP address—Enter the IP address of a remote host capable of logging syslog messages. The Syslog IP address is optional. For more information, refer to the syslog command in the Reference Guide, which starts on page 137, and the system administration manual for your syslog host.

•Domain name server (DNS) IP addresses—Enter the IP addresses of the preferred domain name servers on your network. Use dotted-quad notation: d.d.d.d, where d is a decimal number.

Domain name servers allow users to specify network nodes by name, instead of by IP address. If you configure the Router to use a domain name server on your network, you can use a host name instead of the IP address in many of the Router commands.

Do not specify the address of a domain name server that can only be reached using a WAN interface (modem or sync). If you do, it will cause the Router to dial the phone on all name lookups, and will increase your phone costs unnecessarily.

•Domain suffix—Enter the domain name suffix desired. The domain name suffix is the last group of letters separated by a period (for example, ms.com). Do not include a leading period in the domain suffix you enter. This domain suffix is automatically appended to a hostname entered with a Router command.

To terminate the list of servers press RETURN at the IP address (): prompt. If you do not use a domain suffix, just press RETURN.

Domain names of similar types of organizations on the Internet usually use a common suffix. Typical suffices and organization types are shown in Table 5-2.

5.4.2CHOOSE METHOD OF CLIENT AUTHENTICATION

How do you want to authenticate users connecting to a Router?

Enter the client authentication method desired. The client authentication method only applies to dial- in clients (client to router), and does not apply to LAN-to-LAN services (router to router). If you already have a configured SecurID or RADIUS server on your network, you can choose either to use it (choose 2 or 3), or to use the Router (to store names and passwords; choose 1).

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