acl related document

In this article, you will learn about access lists commonly known as ACLs (Access Control Lists). We will cover IP based access lists, we have other types like AC based ACLs, dynamic or re!le"ive ACLs but they are beyond the scope o! this tutorial. Access lists are used !or # main !unctions$ %. &ilterin' #. Classi!ication %. &ilterin'$ h is is the t echni ue used to allow or deny tra !! ic. In ACLs, we use the keywor d *permit+ !or allow and *deny+ !or disallow . We permit or deny some o r all tra!!ic to r each certain part o! the network. #. Classi !ication$ his does not drops packets as !ilterin' d oes, but i t d oes classi! y the tra !! ic and allows speci!ic type o! tra !!ic. ost commonly used in terms o! P- where we would wa nt to encrypt certain tra!!ic or some o/ con!i'urations (uality o! /ervice ) 0. &or e"ampl e, see ab ov e picture, we want to enc rypt tr a!! ic !l owin' ! rom %1#.%23.%.4 5# 6 network but not the %7#.%2.%.4 5#6 network. his can be usin' access8l ist to select tra!!ic and is known as Classi!ication. 6. In Ac cess 8l ists con!i 'u ra ti on , we use certain sta tement s, wh ic h are re ad 5 processe d or e"ecuted in a top8to8bottom approach. &or e"ample$ 9. An access8list looks like somethin' below. As per the top8down approach, and our e"ample$

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