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Access lists and when to apply them In or Out??

CCNA, CCDA, CCNP, CCDP, CCIP, CCVP and CCIE

Access lists and when to apply them In or Out??

Postby Guest » Mon Oct 08, 2007 9:10 pm

I have been studying for the CCNA exam and one topic that continutally trips me up is access lists and where to apply them.  I understand the rule around placing the standard access list as close to the destination as possible and the extended access list is placed as close to the source as possible.  How do I determine when the access list is placed in the direction In or Out?  Does anyone have a basic rule of thumb where this is concerned that can help me figuring this out?

 

Thank you in advance for any input.

 

Rgds,

Vicky

Guest
 

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Re:Access lists and when to apply them In or Out??

Postby Guest » Mon Oct 08, 2007 10:00 pm

Hello,

 

Put both your arm up to the side (this might sound silly but it will help you believe me ).  See your self as the router. I "Vicky" am the router.  Do i want to permit this traffic (TCP/IP traffic) coming from my left hand or right hand into me (If yes use "IN")  Do I want to permit this traffic away from my body to the connection on my right or left hand? if yes "OUT")  Same logic applies to deny

 

The point am trying to make is put yourself in place of the router handling the traffic and you will know when to use "IN or "OUT".

 

Hope this helps.

Guest
 

Re:Access lists and when to apply them In or Out??

Postby Guest » Mon Oct 08, 2007 10:26 pm

I love this.  Thank you!

Guest
 

Re:Access lists and when to apply them In or Out??

Postby Guest » Mon Oct 08, 2007 11:09 pm

Guest
 

Re:Access lists and when to apply them In or Out??

Postby Guest » Mon Oct 08, 2007 11:44 pm

This is a great powerpoint.  Thank you Ganesh!

Guest
 



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