{"id":33974,"date":"2022-09-29T15:12:35","date_gmt":"2022-09-29T12:12:35","guid":{"rendered":"https:\/\/www.natro.com\/blog\/?p=33974"},"modified":"2023-02-23T13:50:43","modified_gmt":"2023-02-23T10:50:43","slug":"firewall-nedir-nasil-calisir","status":"publish","type":"post","link":"https:\/\/www.natro.com\/blog\/firewall-nedir-nasil-calisir\/","title":{"rendered":"Firewall Nedir, Nas\u0131l \u00c7al\u0131\u015f\u0131r?"},"content":{"rendered":"\n<p>\u0130nternetin hayat\u0131n her alan\u0131nda aktif olarak kullan\u0131ld\u0131\u011f\u0131 ve her daim ihtiya\u00e7 duyuldu\u011fu, bilinen bir ger\u00e7ektir. Bu denli yayg\u0131nla\u015fan platforumun kullan\u0131m\u0131nda g\u00fcvenlik kapsam\u0131nda \u00f6nemli \u00e7al\u0131\u015fmalar yap\u0131lm\u0131\u015f ve halen de yap\u0131lmaya devam eder. \u0130nternette doyas\u0131ya dola\u015f\u0131p bir \u015feyler indirirken g\u00fcvenli\u011finizi sa\u011flayan mekanizma \u201cFirewall\u201d ile kurulur. Bu mekanizma bir nevi dijital bir g\u00fcvenlik duvar\u0131d\u0131r. Firewall kullan\u0131larak genel ve yerel a\u011flar aras\u0131ndaki tehditler filtrelenip engellenebilir.<\/p>\n\n\n\n<p>\u0130nternet ortam\u0131nda dola\u015f\u0131rken fark\u0131nda olarak ya da olmadan g\u00fcvenli olmayan web sitelerine girmeniz s\u00f6z konusu olabilir. Bu sitelere girerken sizi uyaran ve bilgisayar\u0131n\u0131z\u0131n risk alt\u0131nda oldu\u011funu s\u00f6yleyen sistem, Firewall g\u00fcvenlik duvar\u0131d\u0131r. \u00c7o\u011fu kullan\u0131c\u0131, bu mekanizmay\u0131 \u00f6nemsemese de Firewall hayat kurtar\u0131c\u0131 niteli\u011fe sahip bir sistemdir.<\/p>\n\n\n\n<p>Firewall, a\u011f \u00fczerinden gelen ve a\u011fdan giden verileri kontrol alt\u0131na alarak, olas\u0131 tehditlerin filtrelenmesini ve sonu\u00e7ta engellenmesini sa\u011flar. \u0130nternet \u00fczerinde aktif olarak kullan\u0131lan bu sistemin her ge\u00e7en g\u00fcn biraz daha geli\u015fti\u011fini s\u00f6yleyebiliriz. \u00c7\u00fcnk\u00fc baz\u0131 k\u00f6t\u00fc niyetli kaynaklar\u0131n baz\u0131 durumlarda kurulan filtre sisteminden ge\u00e7ebildi\u011fi g\u00f6r\u00fcl\u00fcr. Bu da Firewall sisteminin daha da g\u00fc\u00e7lenmesi gerekti\u011fini g\u00f6sterir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-firewall-ne-ise-yarar\"><span id=\"firewall-ne-ise-yarar\">Firewall Ne \u0130\u015fe Yarar?<\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"800\" height=\"400\" src=\"https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2017\/02\/Config-Server-Firewall.png\" alt=\"\" class=\"wp-image-12000\" srcset=\"https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2017\/02\/Config-Server-Firewall.png 800w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2017\/02\/Config-Server-Firewall-300x150.png 300w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2017\/02\/Config-Server-Firewall-768x384.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Firewall, donan\u0131m ya da yaz\u0131l\u0131m tabanl\u0131 olarak \u00e7al\u0131\u015farak a\u011fa gelen ve a\u011fdan giden trafi\u011fin g\u00fcvenli\u011fini sa\u011flar. Sistem bu g\u00fcvenli\u011fi sa\u011flarken IP filtreleme, web filtreleme, port filtreleme ya da i\u00e7erik filtreleme gibi kontrol ad\u0131mlar\u0131n\u0131 uygular.<\/p>\n\n\n\n<p>G\u00fcn\u00fcm\u00fczde kullan\u0131lan i\u015fletim sistemlerinin \u00f6nemli bir b\u00f6l\u00fcm\u00fc kendi yaz\u0131l\u0131m tabanlar\u0131na uygun Firewall sistemini kullan\u0131rlar. Bunun yan\u0131nda kendi a\u011flar\u0131 aras\u0131nda veri aktar\u0131m\u0131n\u0131 y\u00f6nlendiren kendi Firewall sistemleri de vard\u0131r. Her ne kadar bilgisayar ve internet kullan\u0131m\u0131n\u0131n yayg\u0131nla\u015fmas\u0131 yeni bir teknoloji olsa da Firewall sisteminin kullan\u0131m\u0131 1980\u2019li y\u0131llara dayan\u0131r.<\/p>\n\n\n\n<p>Firewall, \u00f6nceden belirlenmi\u015f bir filtre ile a\u011fdaki veri trafi\u011fini inceler. G\u00fcvenli olmayan kaynaklardan gelen veri paketlerini bu filtreler yard\u0131m\u0131yla engeller. Al\u0131nan bu tedbir ile internet \u00fczerinden gelen zararl\u0131 yaz\u0131l\u0131m ve tehlikelerin de \u00f6n\u00fcne ge\u00e7mek m\u00fcmk\u00fcn hale gelir.<\/p>\n\n\n\n<p>Firewall sistemi, a\u011f \u00fczerinde veri payla\u015f\u0131m\u0131 sa\u011flanan ba\u011flant\u0131 noktalar\u0131nda yer al\u0131r. \u00d6rne\u011fin; kaynak adresi 172.18.1.1 olan sistemin 172.18.2.1 hedefine ula\u015fmas\u0131 sa\u011flan\u0131r. Bu \u00f6rnek, dijital g\u00fcvenlik duvar\u0131n\u0131n yapt\u0131\u011f\u0131 i\u015flemi en iyi \u015fekilde anlat\u0131r.<\/p>\n\n\n\n<h2 id=\"firewall-nasil-calisir\" class=\"wp-block-heading\">Firewall Nas\u0131l \u00c7al\u0131\u015f\u0131r?<\/h2>\n\n\n\n<p>Firewall dijital g\u00fcvenlik sisteminin \u00e7al\u0131\u015fmas\u0131 kompleks bir mekanizma de\u011fildir. Bunu en iyi \u015fekilde anlatma y\u00f6ntemi konuyu bir \u00f6rnek \u00fczerinden a\u00e7\u0131klamakt\u0131r. IP adresini ev, port numaras\u0131n\u0131 ise oda olara d\u00fc\u015f\u00fcnelim. Eve sadece onay verilen, g\u00fcvenli ki\u015filer girebilir. Eve giren ki\u015filerin odalara ula\u015fmas\u0131 i\u00e7in ayr\u0131 bir g\u00fcvenlik filtresi daha uygulan\u0131r. Kurulan yeni ba\u011flant\u0131 noktalar\u0131 ile eve giren ki\u015filerin odalara ula\u015fmas\u0131 sa\u011flan\u0131r. Yani Firewall filtre sistemi birden \u00e7ok noktada kontrol ve denetleme yapar.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"937\" height=\"361\" src=\"https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2016\/12\/firewall.png\" alt=\"\" class=\"wp-image-11561\" srcset=\"https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2016\/12\/firewall.png 937w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2016\/12\/firewall-300x116.png 300w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2016\/12\/firewall-768x296.png 768w\" sizes=\"(max-width: 937px) 100vw, 937px\" \/><\/figure>\n\n\n\n<p>Eski nesil Firewall a\u011f g\u00fcvenlik sistemlerinin paket filtreleme mekanizmas\u0131n\u0131n biraz zay\u0131f kald\u0131\u011f\u0131n\u0131 s\u00f6yleyebiliriz. Temel bir filtre mekanizmas\u0131 \u00fczerinden veri paketlerinin kontrol\u00fc sa\u011flan\u0131yordu. Baz\u0131 durumlarda g\u00fcvenilir kaynaktan gelen istek direkt olarak kabul edilirdi. Zaman i\u00e7erisinde g\u00fcvenilir kaynaklardan gelen isteklerin her birinin iyi niyetli olmad\u0131\u011f\u0131 anla\u015f\u0131ld\u0131. Bu da Firewall sisteminin geli\u015fmesini gerekli k\u0131ld\u0131. G\u00fcn\u00fcm\u00fczde de kurulan dijital g\u00fcvenlik duvar\u0131 sisteminin s\u00fcrekli kendini geli\u015ftirdi\u011fi g\u00f6r\u00fcl\u00fcr.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Web siteleriniz, bar\u0131nd\u0131rma altyap\u0131m\u0131zda kullan\u0131lan orijinal lisansl\u0131 yaz\u0131l\u0131mlar ile olu\u015fabilecek g\u00fcvenlik a\u00e7\u0131klar\u0131 ve veri kay\u0131plar\u0131na kar\u015f\u0131 Natro\u2019da g\u00fcvende.<br><strong>Lisansl\u0131 \u00fcr\u00fcn politikam\u0131z\u0131 incelemek i\u00e7in\u00a0<a href=\"https:\/\/www.natro.com\/lisansli-urun-politikamiz?utm_source=hosting-blog&utm_medium=text-link&utm_campaign=lisans-politikasi\" target=\"_blank\" rel=\"noreferrer noopener\">t\u0131klay\u0131n.<\/a><\/strong><\/p>\n<\/blockquote>\n\n\n\n<h2 id=\"firewall-turleri-nelerdir\" class=\"wp-block-heading\">Firewall T\u00fcrleri Nelerdir?<\/h2>\n\n\n\n<p>H\u00e2lihaz\u0131rda kullan\u0131lan bir\u00e7ok Firewall t\u00fcr\u00fc vard\u0131r. Dilerseniz bu sistemlerin ne oldu\u011fu ve ne i\u015fe yarad\u0131\u011f\u0131 ile ilgili alt ba\u015fl\u0131klar\u0131m\u0131zda arad\u0131\u011f\u0131n\u0131z bilgiyi bulabilirsiniz.<\/p>\n\n\n\n<h3 id=\"next-generation-firewall\" class=\"wp-block-heading\">Next Generation Firewall<\/h3>\n\n\n\n<p>Nex generation Firewall, NGFW k\u0131saltmas\u0131 ile bilinen ve T\u00fcrk\u00e7e kar\u015f\u0131l\u0131\u011f\u0131 yeni nesil g\u00fcvenlik duvar\u0131 olan bir kavramd\u0131r. Bu Firewall t\u00fcr\u00fc, izinsiz giri\u015f \u00f6nleme sistemlerini, \u015fifreli trafik denetimini ve vir\u00fcsten koruma gibi ek \u00f6zellikleri de destekler. Sistemin en \u00f6nemli \u00f6zelli\u011fi derin paket incelemesi olarak da bilinmesidir. Derin paket incelemesi, ne kadar g\u00fcvenilir kaynak olursa olsun t\u00fcm kaynaklardan gelen isteklere \u015f\u00fcphe ile yakla\u015f\u0131l\u0131r. Derinlemesine inceleme yap\u0131ld\u0131\u011f\u0131ndan sisteme derin paket incelemesi denir.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"692\" height=\"692\" src=\"https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-nedir-ne-demek.jpg\" alt=\"\" class=\"wp-image-33979\" srcset=\"https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-nedir-ne-demek.jpg 692w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-nedir-ne-demek-300x300.jpg 300w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-nedir-ne-demek-150x150.jpg 150w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-nedir-ne-demek-80x80.jpg 80w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-nedir-ne-demek-380x380.jpg 380w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-nedir-ne-demek-160x160.jpg 160w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-nedir-ne-demek-600x600.jpg 600w\" sizes=\"(max-width: 692px) 100vw, 692px\" \/><\/figure>\n\n\n\n<h3 id=\"proxy-firewalls\" class=\"wp-block-heading\">Proxy Firewalls<\/h3>\n\n\n\n<p>Proxy Firewall g\u00fcvenlik duvarlar\u0131 uygulama d\u00fczeyinde g\u00fcvenli\u011fin denetlenmesini sa\u011flar. Proxy, di\u011fer sistemlerden farkl\u0131 olarak iki sistem aras\u0131nda bir k\u00f6pr\u00fc g\u00f6revi g\u00f6r\u00fcr. Bu sistem ile istekler g\u00fcvenlik duvar\u0131na g\u00f6nderilir. \u0130stek filtreden ge\u00e7irilir ve iste\u011fin g\u00fcvenilirlik durumuna g\u00f6re istek onaylan\u0131r ya da engellenir. Proxy, FTP ve HTTP gibi protokollerin trafi\u011fini izleyerek filtreleme yapar. Ayn\u0131 zamanda bu i\u015flem esnas\u0131nda derin paket incelemesini de kullan\u0131r.<\/p>\n\n\n\n<h3 id=\"network-address-translation-firewalls\" class=\"wp-block-heading\">Network Address Translation Firewalls<\/h3>\n\n\n\n<p>Bu Firewall t\u00fcr\u00fc k\u0131saca NAT olarak adland\u0131r\u0131l\u0131r. T\u00fcrk\u00e7e kar\u015f\u0131l\u0131\u011f\u0131 ise a\u011f adresi \u00e7evirisidir. Bu sistem ile farkl\u0131 a\u011f adreslerine sahip olan cihazlar tek bir IP adresini kullanarak a\u011fa ba\u011flanabilir. Sistem sayesinde di\u011fer IP\u2019lerin de gizli tutulmas\u0131 sa\u011flan\u0131r. Kurulan bu mekanizma ile IP adresi \u00fczerinden siber sald\u0131r\u0131 yapmak isteyen hacker\u2019lar amac\u0131na ula\u015famaz. NAT, bir bilgisayar grubu ile d\u0131\u015f a\u011f aras\u0131nda yer alan bir sistem olmas\u0131 nedeniyle proxy sistemine de benzer.<\/p>\n\n\n\n<h3 id=\"stateful-multilayer-inspection-firewalls\" class=\"wp-block-heading\">Stateful Multilayer \u0130nspection Firewalls<\/h3>\n\n\n\n<p>Bu Firewall t\u00fcr\u00fc k\u0131saca SMLI olarak ifade edilir. T\u00fcrk\u00e7e kar\u015f\u0131l\u0131\u011f\u0131 ise \u00e7ok katmanl\u0131 denetim ve g\u00fcvenlik duvar\u0131d\u0131r. Sistem hem a\u011f hem de uygulama katmanlar\u0131nda yer alan veri paketlerini inceler. Yap\u0131lan inceleme sonras\u0131nda gerekli kar\u015f\u0131la\u015ft\u0131rmalar yap\u0131l\u0131r. Kar\u015f\u0131la\u015ft\u0131rma sonucu de\u011ferlendirilerek sadece g\u00fcvenli olan paketlerin sisteme ge\u00e7i\u015fine izin verilir. Katman katman filtreleme yapan sistemin incelemesinin de hassas oldu\u011funu s\u00f6yleyebiliriz. Bu sayede kayna\u011f\u0131n g\u00fcvenli oldu\u011fundan emin olmak ama\u00e7lan\u0131r.<\/p>\n\n\n\n<h2 id=\"guvenlik-duvarlarini-kim-icat-etti\" class=\"wp-block-heading\">G\u00fcvenlik Duvarlar\u0131n\u0131 Kim \u0130cat Etti?<\/h2>\n\n\n\n<p>G\u00fcvenlik duvar\u0131n\u0131n icat edilmesini devam eden bir s\u00fcre\u00e7 olarak de\u011ferlendirmek gerekir. Bunun nedeni sistemin s\u00fcrekli geli\u015fme ihtiyac\u0131n\u0131n olmas\u0131d\u0131r. Firewall sisteminin geli\u015fmesine ve evrimine katk\u0131 sa\u011flayan \u00e7ok say\u0131da ki\u015fi vard\u0131r. 1980\u2019lerin sonundan 1990\u2019l\u0131 y\u0131llar\u0131n ortalar\u0131na kadar her bir geli\u015ftirici g\u00fcvenlik duvar\u0131 ile ilgili bile\u015fenler ve s\u00fcr\u00fcmlerin geli\u015ftirilmesi kapsam\u0131nda modern ad\u0131mlar atm\u0131\u015ft\u0131r. Dilerseniz geli\u015ftiricilerin sisteme katk\u0131lar\u0131na alt ba\u015fl\u0131klar\u0131m\u0131zda de\u011finelim.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"848\" height=\"565\" src=\"https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-neden-onemli.jpg\" alt=\"\" class=\"wp-image-33980\" srcset=\"https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-neden-onemli.jpg 848w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-neden-onemli-300x200.jpg 300w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-neden-onemli-768x512.jpg 768w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-neden-onemli-380x253.jpg 380w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-neden-onemli-800x533.jpg 800w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-neden-onemli-760x506.jpg 760w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-neden-onemli-600x400.jpg 600w\" sizes=\"(max-width: 848px) 100vw, 848px\" \/><\/figure>\n\n\n\n<h3 id=\"jeff-mogul-brian-reid-ve-paul-vixienin-firewalla-katkilari\" class=\"wp-block-heading\">Jeff Mogul, Brian Reid ve Paul Vixie\u2019nin Firewall\u2019a Katk\u0131lar\u0131<\/h3>\n\n\n\n<p>1980\u2019lerin sonlar\u0131na do\u011fru bu \u00fc\u00e7l\u00fc \u00e7al\u0131\u015fma ekibi g\u00fcvenlik duvar\u0131n\u0131n gelecekte \u00e7ok daha de\u011ferli hale gelecek filtreleme teknolojinin geli\u015ftirilmesinde rol oynam\u0131\u015ft\u0131r. Sisteme yap\u0131lan katk\u0131lar ile d\u00e2hili bir a\u011f \u00fczerindeki bilgisayarlarla ileti\u015fime ge\u00e7meden harici ba\u011flant\u0131lar incelenmi\u015ftir. Baz\u0131 kaynaklarda bu g\u00fcvenlik duvar\u0131, \u201cilk g\u00fcvenlik duvar\u0131\u201d olarak da ifade edilir. Fakat sistemin gelecek yani ger\u00e7ek g\u00fcvenlik duvar\u0131 olarak ifade edilmesi \u00e7ok daha do\u011fru bir kavramd\u0131r. \u00a0\u00a0\u00a0\u00a0<\/p>\n\n\n\n<h3 id=\"steven-bellovin-kshitiji-nigam-david-presotto-william-cheswick-ve-janardan-sharmanin-sisteme-katkilar\" class=\"wp-block-heading\">Steven Bellovin, Kshitiji Nigam, David Presotto, William Cheswick ve Janardan Sharma\u2019n\u0131n Sisteme Katk\u0131lar<\/h3>\n\n\n\n<p>Ba\u015fl\u0131kta ismi ge\u00e7en ekip, AT&T Bell Labs b\u00fcnyesinde, 1980\u2019lerin sonundan 1990\u2019lar\u0131n ba\u015f\u0131na kadar g\u00fcvenlik duvar\u0131 konsepti ile ilgili \u00e7e\u015fitli ara\u015ft\u0131rmalar yapm\u0131\u015ft\u0131r. Bu, her veri paketinden sonra yetkilendirmeye kar\u015f\u0131 devam eden ve ba\u011flant\u0131lar\u0131n denetlenmesine izin veren bir g\u00fcvenlik duvar\u0131 idi. 1989-1990 y\u0131llar\u0131nda devre d\u00fczeyinde \u00e7al\u0131\u015fan a\u011f ge\u00e7idi geli\u015ftirilmi\u015ftir. Bu geli\u015fmeyi 1991 y\u0131l\u0131nda Cheswick ve Bellovin taraf\u0131ndan yap\u0131lan g\u00fcvenlik duvar\u0131 \u00e7al\u0131\u015fmalar\u0131 izlemi\u015ftir.<\/p>\n\n\n\n<h3 id=\"marcus-ranumun-firewall-sistemine-katkilari\" class=\"wp-block-heading\">Marcus Ranum\u2019un Firewall Sistemine Katk\u0131lar\u0131<\/h3>\n\n\n\n<p>Ranum, 1991-1992 y\u0131llar\u0131 aras\u0131nda yapt\u0131\u011f\u0131 Firewall \u00e7al\u0131\u015fmalar\u0131 ile g\u00fcvenlik duvar\u0131n\u0131n hayati bile\u015fenlerinin geli\u015ftirilmesine katk\u0131 sa\u011flam\u0131\u015ft\u0131r. 1991 y\u0131l\u0131nda proxy d\u0131\u015f eri\u015fim ba\u011flant\u0131s\u0131 olarak an\u0131lan SEAL, Ranum taraf\u0131ndan piyasaya s\u00fcr\u00fclen ilk g\u00fcvenlik duvar\u0131 idi.<\/p>\n\n\n\n<h3 id=\"nir-zuk-ve-gil-shwedin-sisteme-katkilari\" class=\"wp-block-heading\">Nir Zuk ve Gil Shwed\u2019in Sisteme Katk\u0131lar\u0131<\/h3>\n\n\n\n<p>Gil Shwed, Check Point \u015firketinin kurucusudur. \u015eirket i\u00e7inde geli\u015ftirici personel olarak g\u00f6rev alan ki\u015fi de Nir Zuk\u2019tur. Kurucu ve geli\u015ftirici olarak \u00e7al\u0131\u015fan ikili ekip 1993-1994 y\u0131llar\u0131 aras\u0131nda g\u00fcvenlik duvar\u0131n\u0131n geli\u015ftirilmesinde \u00f6nemli rol oynam\u0131\u015ft\u0131r. Shwed Firewall sisteminin ABD patentini alm\u0131\u015f, Nir Zuk ise g\u00fcvenlik duvar\u0131n\u0131n kullan\u0131m\u0131n\u0131n \u00e7ok daha pratik hale getirilmesi i\u00e7in grafik aray\u00fcz\u00fc \u00fczerinde \u00f6nemli \u00e7al\u0131\u015fmalar yapm\u0131\u015ft\u0131r. S\u00f6z konusu geli\u015fmeler, g\u00fcn\u00fcm\u00fczde kullan\u0131lan Firewall sistemlerinin modern hale gelmesinde \u00f6nemli rol oynam\u0131\u015ft\u0131r.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"908\" height=\"527\" src=\"https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-nedir.jpg\" alt=\"\" class=\"wp-image-33978\" srcset=\"https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-nedir.jpg 908w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-nedir-300x174.jpg 300w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-nedir-768x446.jpg 768w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-nedir-380x221.jpg 380w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-nedir-800x464.jpg 800w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-nedir-760x441.jpg 760w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2022\/09\/firewall-nedir-600x348.jpg 600w\" sizes=\"(max-width: 908px) 100vw, 908px\" \/><\/figure>\n\n\n\n<h2 id=\"firewall-neden-onemlidir\" class=\"wp-block-heading\">Firewall Neden \u00d6nemlidir?<\/h2>\n\n\n\n<p>Korunmas\u0131z olan a\u011flar, sisteme eri\u015fmeye \u00e7al\u0131\u015fan her t\u00fcrl\u00fc trafi\u011fe kar\u015f\u0131 g\u00fcvenli de\u011fildir. Zararl\u0131 olmas\u0131 ya da olmamas\u0131 \u00f6nemli olmaks\u0131z\u0131n a\u011f trafi\u011finin her zaman denetlenmesine ihtiya\u00e7 vard\u0131r. Kurulan modern bir mekanizma ile sistemin do\u011fru ve g\u00fcvenli \u015fekilde \u00e7al\u0131\u015fmas\u0131 sa\u011flanabilir.<\/p>\n\n\n\n<p>Ki\u015fisel bilgisayarlar\u0131n ba\u015fka a\u011flara ya da internete ba\u011flanmas\u0131, g\u00fcvenlik hususlar\u0131n\u0131n g\u00fcndeme gelmesini sa\u011flar. Ba\u015fka a\u011flarla ya da internete ba\u011flanma gibi durumlarda cihaz\u0131n korunmaya ihtiyac\u0131 vard\u0131r. Bilgisayar korsanl\u0131\u011f\u0131, k\u00f6t\u00fc ama\u00e7l\u0131 yazl\u0131mlar ya da \u00e7evrimi\u00e7i faaliyet g\u00f6steren doland\u0131r\u0131c\u0131l\u0131k faaliyetleri bu anlamda yayg\u0131n olarak g\u00f6r\u00fclen tehlikelerdir.<\/p>\n\n\n\n<p>K\u00f6t\u00fc niyetli ki\u015filer ya da yaz\u0131l\u0131mlar taraf\u0131ndan cihaz a\u011f\u0131n\u0131za s\u0131z\u0131ld\u0131ktan sonra cihaz\u0131n\u0131za eri\u015filebilir ve \u00e7e\u015fitli tehditler s\u00f6z konusu olabilir. Bu nedenle bilgisayar\u0131n\u0131z\u0131n 24 saat risk alt\u0131nda oldu\u011funu s\u00f6yleyebiliriz. Firewall sistemi ile bu risklerin ortadan kald\u0131r\u0131lmas\u0131 m\u00fcmk\u00fcnd\u00fcr.<\/p>\n\n\n\n<p>Covid-19 tedbirleri kapsam\u0131nda ABD federal ajans\u0131 uzaktan \u00e7al\u0131\u015fma karar\u0131 alm\u0131\u015ft\u0131r. Fakat bu yap\u0131l\u0131rken g\u00fcvenlik duvar\u0131ndaki zay\u0131fl\u0131k nedeniyle sistemde \u00e7ok \u00f6nemli zafiyetler tespit edilmi\u015ftir. Kurulan sistemin en \u00f6nemli dezavantaj\u0131 trafi\u011fe a\u00e7\u0131k olan bir\u00e7ok giden ba\u011flant\u0131 noktas\u0131n\u0131n kurulmas\u0131 idi. Bu nedenle g\u00fcvenlik duvar\u0131n\u0131n kullanmak kadar sistem \u00fczerine entegre edilmesi de \u00e7ok \u00f6nemlidir. 2020 y\u0131l\u0131nda ya\u015fanan bu zafiyet k\u0131sa s\u00fcrede tespit edilerek g\u00fcvenlik duvar\u0131 mimarisi ABD federal ajans\u0131 taraf\u0131ndan yeniden in\u015fa edilmi\u015ftir.\u00a0\u00a0Yeni sistemin hayata ge\u00e7irilmesinden sonra sistemin g\u00fcvenlik duvar\u0131nda herhangi bir olumsuzluk ya da g\u00fcvenlik a\u00e7\u0131\u011f\u0131 g\u00f6zlenmemi\u015ftir.<\/p>\n\n\n\n<p>Herhangi bir a\u011f t\u00fcr\u00fcn\u00fc kullan\u0131rken sistemin korunmas\u0131 ve g\u00fcvenli\u011finin sa\u011flanmas\u0131 \u00e7ok \u00f6nemlidir. Firewall a\u011f\u0131n g\u00fcvenli\u011fini sa\u011flamak ad\u0131na g\u00f6r\u00fcnmez bir dijital duvar \u00f6rerek sistemi tehlikelere kar\u015f\u0131 korur. Konu ile ilgili ayr\u0131nt\u0131l\u0131 bilgi almak ve sistem g\u00fcvenli\u011finiz ile ilgili neler yapabilece\u011finize karar vermek ad\u0131na Natro ile ileti\u015fime ge\u00e7ebilirsiniz. Arad\u0131\u011f\u0131n\u0131z her t\u00fcrl\u00fc g\u00fcvenlik gereksinimini Natro arac\u0131l\u0131\u011f\u0131 ile temin edebilirsiniz.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><a href=\"https:\/\/www.natro.com\/lisansli-urun-politikamiz?utm_source=hosting-blog&utm_medium=banner-link&utm_campaign=lisans-politikasi\"><img decoding=\"async\" src=\"https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2023\/02\/blog-header.jpg\" alt=\"\" class=\"wp-image-34436\" width=\"679\" height=\"249\" srcset=\"https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2023\/02\/blog-header.jpg 600w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2023\/02\/blog-header-300x110.jpg 300w, https:\/\/www.natro.com\/blog\/wp-content\/uploads\/2023\/02\/blog-header-380x139.jpg 380w\" sizes=\"(max-width: 679px) 100vw, 679px\" \/><\/a><\/figure>\n","protected":false},"excerpt":{"rendered":"\u0130nternetin hayat\u0131n her alan\u0131nda aktif olarak kullan\u0131ld\u0131\u011f\u0131 ve her daim ihtiya\u00e7 duyuldu\u011fu, bilinen bir ger\u00e7ektir. Bu denli yayg\u0131nla\u015fan&hellip;\n","protected":false},"author":7,"featured_media":33975,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[53],"tags":[],"class_list":{"0":"post-33974","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-guvenlik"},"_links":{"self":[{"href":"https:\/\/www.natro.com\/blog\/wp-json\/wp\/v2\/posts\/33974","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.natro.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.natro.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.natro.com\/blog\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.natro.com\/blog\/wp-json\/wp\/v2\/comments?post=33974"}],"version-history":[{"count":2,"href":"https:\/\/www.natro.com\/blog\/wp-json\/wp\/v2\/posts\/33974\/revisions"}],"predecessor-version":[{"id":34494,"href":"https:\/\/www.natro.com\/blog\/wp-json\/wp\/v2\/posts\/33974\/revisions\/34494"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.natro.com\/blog\/wp-json\/wp\/v2\/media\/33975"}],"wp:attachment":[{"href":"https:\/\/www.natro.com\/blog\/wp-json\/wp\/v2\/media?parent=33974"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.natro.com\/blog\/wp-json\/wp\/v2\/categories?post=33974"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.natro.com\/blog\/wp-json\/wp\/v2\/tags?post=33974"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}