Black Box LRA001A-R2, LRS002A-R2, LRA005A-R2 Appendix a Networking Examples, Dialup LAN-to-LAN

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

Appendix A: Networking Examples

This appendix describes two typical Router installations:

•dialup LAN-to-LAN,

•synchronous LAN-to-LAN.

A.1 Dialup LAN-to-LAN

A.1.1 USING NAMES AND PASSWORDS

To provide basic security for your network, each Router is configured with a name, a root password and a link password. The Router name and link password are required when connecting to or from a remote router. The root password is additionally required to establish a telnet or ftp session (TCP/IP only) to the Router, or to establish a RouterVu session (IPX only) to the Router, or when logging in on the system console.

For security on the WAN interface, the Router can use either the Password Authentication Protocol (PAP) or Challenge Handshake Authentication Protocol (CHAP). The Router is configured to enable CHAP by default. The CHAP and PAP “handshake” requires a name and link password pair from each router. For example, when router A connects with router B, router A must present router A’s name and link password to router B. Conversely, when router B connects with router A, router B must present router B’s name and link password to router A. The name and link password for both ends of the link are maintained in the password file on the Router diskette. If the PAP or CHAP handshake does not complete successfully, the two devices are not allowed to communicate.

Name and password security is further illustrated by the following example. Consider the network connections made by Routers with the following system names, link passwords, and password file entries:

Table A-1. Connection Example: Async Router AR-5 to Async Router AR-Ps.

System	Name	Link Password	password file entries
			name/password
Async Router AR-5	paris	all2paris	hamburg/ham2paris
			london/lon2paris
			northridge/nor2paris
Async Router AR-P	hamburg	ham2paris	paris/all2paris
Async Router AR-P	london	lon2paris	paris/all2paris
Async Router AR-P	northridge	nor2paris	paris/all2paris

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