some command question

hc2abhc2ab MemberMember Posts: 42 ■■□□□□□□□□
can someone elaborate what this 2 command do?
ip classless
no ip directed-broadcast

Comments

  • Ten9t6Ten9t6 Senior Member Member Posts: 691
    hc2ab,

    Both are on by default in IOS 12.0 and higher. IP classless, is on to allow you to further subnet an IP address range. Not all routing protocols support it, so it may need to be turned off, depending on your network.

    no Directed-broadcast....stops a device or from pinging a broadcast address of a network. If this is not stopped, all devices in the network would respond to the ping. Do a google search on smurf attack.

    Let me know if you have anymore questions...

    Kenny
    Kenny

    A+, Network+, Linux+, Security+, MCSE+I, MCSE:Security, MCDBA, CCNP, CCDP, CCSP, CCVP, CCIE Written (R/S, Voice),INFOSEC, JNCIA (M and FWV), JNCIS (M and FWV), ENA, C|EH, ACA, ACS, ACE, CTP, CISSP, SSCP, MCIWD, CIWSA
  • WebmasterWebmaster Johan Hiemstra Admin Posts: 10,292 Admin
    Ten9t6 wrote:
    Do a google search on smurf attack.
    or, check out my DoS attacks TechNotes:
    icon_arrow.gifwww.techexams.net/technotes/securityplus/attacks-DDOS.shtml#smurf
  • Ten9t6Ten9t6 Senior Member Member Posts: 691
    yeah...that is what I meant. icon_wink.gif

    Kenny
    Kenny

    A+, Network+, Linux+, Security+, MCSE+I, MCSE:Security, MCDBA, CCNP, CCDP, CCSP, CCVP, CCIE Written (R/S, Voice),INFOSEC, JNCIA (M and FWV), JNCIS (M and FWV), ENA, C|EH, ACA, ACS, ACE, CTP, CISSP, SSCP, MCIWD, CIWSA
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