firewalls for network sec

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    OKSLTBGGV

    OAS

    IL]TASJ VLF\SK][

    Vuchkttlm cy>

    Ceuplimrb Juhbr, _knby skide

    (Kitldrbtlm H.]lfe.)

    2

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    A\]GKIL

    Tebt ks Vlfurkty

    Illm ao slfurkty

    Tea ks vugilrbcgl Fahhai slfurkty bttbfjs bim telkr fauitlrhlbsurls

    Lglhlits ao slfurkty

    Avlrvklw ao Okrlwbggs

    ]ypls ao okrlwbgg

    Okrlwbgg febrbftlrkstkfs

    3

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    Autgkil (fait.)

    Khpglhlitbtkai ao okrlwbgg

    Ebrmwbrl okrlwbgg

    Vaotwbrl okrlwbgg

    Mrbwcbfjs

    rlolrlifls

    6

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    Tebt ks Vlfurkty

    2. Orllmah orah rksj ar mbidlr: sbolty.

    3. Orllmah orah mauct, bixklty, ar olbr: faiokmlifl.

    6. Vahltekid tebt dkvls ar bssurls sbolty, bs

    2. B draup ar mlpbrthlit ao prkvbtl dubrms> Fbgg cukgmkid slfurkty ko b

    vksktar bfts suspkfkaus.

    3. Hlbsurls bmaptlm cy b davlrihlit ta prlvlit lspkaibdl, sbcatbdl,ar bttbfj.

    6. Hlbsurls bmaptlm, bs cy b cuskilss ar eahlawilr, ta prlvlit b frkhsufe bs curdgbry ar bssbugt> Vlfurkty wbs gbx bt tel okrh's shbgglr pgbit

    =

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    Illm ao slfurkty

    Pratlft vktbg kioarhbtkai wekgl stkgg bggawkid

    bfflss ta teasl wea illm kt

    ]rbml slfrlts, hlmkfbg rlfarms, ltf.

    Pravkml butelitkfbtkai bim bfflss faitrag oar

    rlsaurfls Dubrbitll bvbkgbckgkty ao rlsaurfls

    Lx> < ;s (;;.;;;% rlgkbckgkty)

    Bgg trbookf orah kiskml ta autskml bim autskml ta kiskml hust

    pbss teraude tel okrlwbgg (peyskfbggy cgafjkid bgg bfflss ta

    tel gafbg iltwarj lxflpt vkb tel okrlwbgg)

    Aigy butearkzlm trbookf (mlokilm cy tel gafbg slfurkty pagkfy)

    wkgg cl bggawlm ta pbss

    ]el okrlwbgg ktslgo ks khhuil ta pliltrbtkai

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    Okrlwbgg Febrbftlrkstkfs

    \slr faitragFaitrags bfflss ta b slrvkfl bffarmkid ta

    wekfe uslr ks bttlhptkid ta bfflss kt

    Clebvkar faitrag

    Faitrags eaw pbrtkfugbr slrvkfls brl uslm(l.d., kt hby libcgl lxtlribg bfflss ta aigy bpartkai ao gafbg kioarhbtkai).

    2 O]P, E]]P, ]lgilt

    ltf.3=

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    Part Vfbis

    Teli ebfjlrs rlhatlgy spy ai aur fahputlrs

    ta sll webt saotwbrl bim slrvkfls wl ebvl.

    Part sfbis brl fahhai cut wkte b praplrgy

    faiokdurlm bim hbkitbkilm okrlwbgg wl fbi

    rlstrkft bfflss.

    3

    Pbfjlt okgtlrkid

    Praxy slrvkfl

    Vtbtl-ougg kisplftkai

    6?

    Ebrmwbrl Okrlwbgg (Fait.)

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    ( )

    Pbfjlt okgtlrkid - Pbfjlts brl bibgyzlm bdbkist b slt aookgtlrs.

    Praxy slrvkfl - Kioarhbtkai orah tel Kitlrilt ksrltrklvlm cy tel okrlwbgg bim teli slit ta telrlqulstkid systlh bim vkfl vlrsb.

    Vtbtl-ougg kisplftkai Kt fahpbrls flrtbki jly pbrts ao

    tel pbfjlt ta b mbtbcbsl ao trustlm kioarhbtkai.Kioarhbtkai trbvlgkid orah kiskml ta tel autskml kshaiktarlm oar splfkokf mlokikid febrbftlrkstkfs, telikifahkid kioarhbtkai ks fahpbrlm ta telslfebrbftlrkstkfs.

    64

    Ebrmwbrl Okrlwbgg (Fait.)

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    ( )

    kt pratlfts us orah>

    Slhatl gadkis

    Bppgkfbtkai cbfjmaars

    VH]P slsskai eknbfjkid

    L-hbkg Bmmrlssls

    Vpbh

    Mlikbg ao slrvkfl

    L-hbkg cahcs

    L-hbkg slit 2000s ao tkhls tkgg hbkgcax ks ougg

    Hbfras

    _krusls65

    Vaotwbrl Okrlwbgg

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    Bgsa fbgglm Bppgkfbtkai Glvlg Okrlwbggs

    Kt ks okrlwbgg tebt aplrbtl bt tel Bppgkfbtkai Gbylr aotel AVK

    ]ely okgtlr pbfjlts bt tel iltwarj gbylr

    Kt Aplrbtkid cltwlli tel Mbtb gkij Gbylr bim telIltwarj Gbylr

    Kt haiktar tel fahhuikfbtkai typl (]FP, KP ltf.) bswlgg bs tel arkdkibtkai ao tel pbfjlt, mlstkibtkaipart ao tel pbfjlt, bim bppgkfbtkai (pradrbh) telpbfjlt ks fahkid orah ar elbmlm ta.

    6;

    Vaotwbrl Okrlwbgg (Fait )

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    Vaotwbrl Okrlwbgg (Fait.)

    Eaw mals saotwbrl okrlwbgg warjs 1

    =0

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    Okrlwbgg Vaotwbrl ]ypls

    Pracglhs ta wbtfe oar

    Bmhkikstrbtkvl gkhktbtkais Bfflss

    Haiktarkid

    gaddkid

    Hbibdlhlit rlqukrlhlits

    Bmmktkaibg faitrag pakits Bmmktkaibg iai-slfurl bppgkfbtkais rlqukrlm

    Vaotwbrl gkhktbtkais

    Fbpbfkty

    Bvbkgbckgkty

    Ebrmwbrl=2

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    Okrlwbggs oar mkoolrlit

    aplrbtkid systlhs

    Okrlwbgg oar Tkimaws

    ^ail Bgbrh

    Tkirautl

    ]ranbi ]rbp - ]ranbi Earsl

    Okrlwbgg oar Gkiux

    Kptbcgls

    Okrlwbgg oar Hbf

    Iltcbrrklr =3

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    Vaotwbrl Okrlwbgg (Fait.)

    Clilokt ao bppgkfbtkai okrlwbggs

    lbsklr ta trbfj weli b patlitkbg vugilrbckgkty

    ebpplis

    pratlft bdbkist ilw vugilrbckgktkls cloarl tely

    brl oauim bim lxpgaktlm

    bckgkty ta "uimlrstbim" bppgkfbtkais splfkokfkioarhbtkai strufturl

    Kifahkid ar autdakid pbfjlts fbiiat bfflss

    slrvkfls oar wekfe telrl ks ia praxy=6

    Vaotwbrl Okrlwbgg (Fait )

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    Vaotwbrl Okrlwbgg (Fait.)

    Clilokt ao bppgkfbtkai okrlwbggs (fait..)

    bggaw mkrlft faiilftkai cltwlli fgklit bim east

    bckgkty ta rlpart ta kitruskai mltlftkai saotwbrl

    lqukpplm wkte b flrtbki glvlg ao gadkf

    Hbjl kitlggkdlit mlfkskais faiokdurlm ta felfj oar b jiawi _ugilrbckgkty

    gbrdl bhauit ao gaddkid

    ==

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    sgaw mawi iltwarj bfflss mrbhbtkfbggy

    harl susflptkcgl ta mkstrkcutlm mlikbg ao slrvkfl

    (MMAV) bttbfjs.

    iat trbispbrlit ta lim uslrs rlqukrl hbiubg faiokdurbtkai ao lbfe fgklit

    fahputlr

    =//aigkil.slfurktyoafus.fah/kioafus/2Slplggkid tel Tkgy Ebfjlr. Bmmksai-Tlsgly, 3000

    Dbsslr, H. Cukgmkid b Vlfurl Fahputlr Vystlh. Slkieagm, 2;55

    Poglldlr, F. Vlfurkty ki Fahputkid. Prlitkfl Ebgg, 2;;4

    Dbilseb I., Kitramuftkai ta okrlwbggs

    ]bilicbuh V. Bimrlw, Fahputlr iltwarjs, prlitkfl ebgg ao kimkb,300

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    =5