description required of ACL

[skmparvez]

20 permit ip host 71.72.73.74 61.62.63.64 0.0.0.15

IP used here is just for an example. i have seen this when i put sh access-list command in a router.

can someone please describe the meaning of this line.

[Karsten Iwen]

This ACE allows any ip traffic from the host 71.72.73.74 to the network 61.62.63.64/28, that are the adresses from 61.62.63.64-79. IOS uses wildcardmasks in ACLs, which are inverted netmasks.

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[skmparvez]

thanks a lot

[Kuldeep singh]

I think this ACL is wrong because number 20 indicates standard access list.

Access List Type	Number
Standard IP Access Lists	1-99
Extended IP Access Lists	100-199

We can not use destination in Standard access list.

Correct me if i am wrong ?

[Karsten Iwen]

"20" is not the ACL-number, it's the sequence-number of the ACE in a named ACL.


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[vinayk3]

Hi ,

Please follow the below mentioned links and they will clear all your concepts on Access-list.

http://www.cisco.com/en/US/products/sw/secursw/ps1018/products_tech_note09186a00800a5b9a.shtml

http://www.cisco.com/web/about/security/intelligence/acl-logging.html

HTH

Vinay