Dell Force10 S4820T S4820T Configuration Guide - Page 850

www.dell.com | support.dell.com VTY Line and Access-Class Configuration Various methods are available to restrict VTY access in FTOS. These depend on which authentication scheme you use - line, local, or remote: Table 42-1. VTY Access Authentication Method Line Local TACACS+ RADIUS Username VTY access-class access-class support? support? YES NO NO YES YES NO YES NO Remote authorization support? NO NO YES (with FTOS 5.2.1.0 and later) YES (with FTOS 6.1.1.0 and later) FTOS provides several ways to configure access classes for VTY lines, including: • VTY Line Local Authentication and Authorization on page 850 • VTY Line Remote Authentication and Authorization on page 851 VTY Line Local Authentication and Authorization FTOS retrieves the access class from the local database. To use this feature: 1. Create a username 2. Enter a password 3. Assign an access class 4. Enter a privilege level Line authentication can be assigned on a per-VTY basis; it is a simple password authentication, using an access-class as authorization. Local authentication is configured globally. You configure access classes on a per-user basis. FTOS can assign different access classes to different users by username. Until users attempt to log in, FTOS does not know if they will be assigned a VTY line. This means that incoming users always see a login prompt even if you have excluded them from the VTY line with a deny-all access class. Once users identify themselves, FTOS retrieves the access class from the local database and applies it. (FTOS also subsequently can close the connection if a user is denied access). Note: If a VTY user logs in with RADIUS authentication, the privilege level will be applied from the RADIUS server only if RADIUS authentication is configured. 850 | Security