web analytics
  • RSS

  • Polls

    What Cisco Cert Are You Currently Studying?

    View Results

    Loading ... Loading ...
  • Search on CiscoBibles

  • Popular Posts

  • Recent Comments

  • Archives

  • « | Main | »

    CCSP SNRS Lab2 – Lock-and-Key (Dynamic Access Lists)

    By admin | August 14, 2010


    Lab Object

    Technical characteristics:

    1. Provide the authentication based on the single user.

    2. Simplify the management in a large network.

    3. Reduce the handling burden of the router, as the list is temporary and is not written statically.

    4. Reduce the possibility of address spoofing attack.

    Lab Process

    1. The configuration steps of :

    GW(config)#access-list 101 permit tcp any host eq 23

    GW(config)#access-list 101 dynamic DACL timeout 9999 permit ip any any

    Here, timeout time is implicit, if time exceeds this time, re-authentication must be performed.

    GW(config)#interface e0/0

    GW(config-if)#ip access-group 101 in

    GW(config)#username cisco password cisco

    GW(config)#line vty 0 4

    GW(config-line)#login local

    GW(config-line)#autocommand access-enable host timeout 6

    After the success of authentication, the whole network will be allowed if not adding the host based on the host authentication.

    2. Test:

    When the inside router wants to access the outside router, first, telnet the gateway router, after the success of authentication, disconnect telnet and then the list will be generated dynamically on the gateway router. Thus the inside router can access the outside router.

    But the gateway router configured as above can’t be login by telnet, Autocommand can be written under the username, thus the gateway router can be login

    GW(config)# username cisco autocommand access-enable host timeout 6

    Clear the generated dynamic access list:

    GW(config)# clear access-template 101 DACL host any


    Share and Enjoy:
    • Print
    • Digg
    • StumbleUpon
    • del.icio.us
    • Facebook
    • Yahoo! Buzz
    • Twitter
    • Google Bookmarks
    • LinkedIn
    • email
    • Live
    • MySpace

    Topics: CCSP, CCSP Lab Kits | No Comments »


    You must be logged in to post a comment.