Solved

Access List usage

Posted on 2011-09-08
4
239 Views
Last Modified: 2012-05-12
If I understand there are 3 types of Access list.

Standard 1-99
Extended 100-xxxx
Named Access list

Standard is used for allow/deny IP , ex:access-list 99 permit ip 192.168.1.0 0.0.0.255 any

Extended is used to allow specific port ex:access-list 101 permit TCP  192.168.1.0 0.0.0.255 any eq 23

I am not sure about the named access list when they are used.

Can you please go through my statements and correct me?

Thanks

0
Comment
Question by:jskfan
4 Comments
 
LVL 35

Assisted Solution

by:Ernie Beek
Ernie Beek earned 166 total points
ID: 36501527
From IOS release 11.2 it was possible to use a name instead of an access list number.
So instead of: access-list 99 permit ip 192.168.1.0 0.0.0.255 any you can use: access-list in-out permit ip 192.168.1.0 0.0.0.255 any

You might to have a look at: http://www.cisco.com/en/US/products/sw/secursw/ps1018/products_tech_note09186a00800a5b9a.shtml
0
 
LVL 18

Accepted Solution

by:
fgasimzade earned 167 total points
ID: 36501544
Well, there are 2 types of access-lists, standard and extended. Each of them can be either named or numbered.


With standard access list you can only specify source address, not destination:

access-list 99 permit ip 192.168.1.0 0.0.0.255

With extended access list you can specify destination as well as ports.

Named access lists (standard or extended) is just an evolution of numbered access-lists, it allows you to specify a meaningful name for access-list
0
 
LVL 17

Assisted Solution

by:MAG03
MAG03 earned 167 total points
ID: 36508618
Just to add to what fgasimzade has said,

Named access lists don't just let you specify a meaningful name but it is the only ACL where you can use sequence numbers so you do not have to remove edit and then add the existing access list when you need to make modifications.  With Named ALC you can just enter the sequence number where you want to place the new entry in the ACL and you are done.
0
 

Author Closing Comment

by:jskfan
ID: 36585212
Thank you Guys!
0

Featured Post

New! My Passport Wireless Pro Wi-Fi Mobile Storage

Portable wireless storage to offload, edit, and stream anywhere.

High-capacity, wireless mobile storage designed to accompany professional photographers and videographers in the field to easily offload, edit and stream captured photos and high-definition videos.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
For many of us, the  holiday season kindles the natural urge to give back to our friends, family members and communities. While it's easy for friends to notice the impact of such deeds, understanding the contributions of businesses and enterprises i…
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…
In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're interested in additional methods for monitoring bandwidt…

895 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

20 Experts available now in Live!

Get 1:1 Help Now