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  1. hi, great website ! i’m still learning basic guides cisco autodidact. i hope i can catch this section soon.

  2. Rene,

    I have been working on access-lists and NAT on my little lab. I have a Cisco router connected to a D Link router that is in turn connected to a vonage router which in turn connects to a Cable mode - my gateway to the internet. I am able to ping the D Link IP address from the cisco router and also the internet. The D link using subnet. I configured other subnets behind the cisco router. I managed to use NAT to be able to ping the D Link router but could never be able to ping anythin on the internet. All my other subnets behind the cisco

    ... Continue reading in our forum

  3. Good question, there are quite some differences.

    The reflexive access-list can match on L2-L4 attributes, just like the normal extended access-list. It’s quite “dumb” since the only thing it does is track the outgoing traffic and creating an access-list entry automatically that reverses the source / destination IP and port numbers. This works for traffic like HTTP but not for applications with dynamic port numbers.

    CBAC is a lot smarter, it can match up to L7 attributes and supports a wide range of protocols. The reflexive access-list and CBAC are both configur

    ... Continue reading in our forum

  4. Hi Nabeel,

    The short answer…not very well. Reflexive ACLs just create a temporary permit statement that is the opposite of the outgoing traffic. If you want to use this you’ll need to use passive FTP.

    If you only can use active FTP, take a look at CBAC.


  5. Do relexive access lists imply that by default, Cisco’s ACL’s are not stateful?

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