ACL

[dangal.43]

how many types of ACLs are there?

can someone provide me good template to write an ACL?

[JORGE RODRIGUEZ]

There are sereral types of ACLs, the most commonly used are standard ACLs and Extended ACLs.. and are apply many different ways depending on network topology and at what point you want to block or allow traffic to go throught.

Refer to this link

http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_configuration_guide_chapter09186a00800ca7c0.html

Examples of ACLs.

http://www.cisco.com/en/US/tech/tk648/tk361/technologies_configuration_example09186a0080100548.shtml

HTH

Jorge

[bvsnarayana03]

To start with there are 2 types:

Standard: ACL No. from 1 - 99

these acls are used to filter traffic from source.

Extended: Acl No. 100 - 199

these acls are used to filter traffic on the basis of source, destination & port No.

Standard: access-list 102 permit host x.x.x.x

Extended: access-list 102 permit tcp host x.x.x.x host x.x.x.x eq port No.