{"id":11559,"date":"2017-01-03T02:53:02","date_gmt":"2017-01-03T00:53:02","guid":{"rendered":"https:\/\/blog.natro.com\/?p=11559"},"modified":"2022-04-01T16:22:54","modified_gmt":"2022-04-01T13:22:54","slug":"firewall-nedir","status":"publish","type":"post","link":"https:\/\/www.natro.com\/blog\/firewall-nedir\/","title":{"rendered":"Firewall Nedir? | Firewall G\u00fcvenlik Duvar\u0131"},"content":{"rendered":"

Bu yaz\u0131m\u0131zda sekt\u00f6r\u00fcn temel g\u00fcvenlik ta\u015flar\u0131ndan olan Firewall-G\u00fcvenlik Duvar\u0131\u00a0<\/strong>hakk\u0131nda genel bir bilgi payla\u015f\u0131m\u0131nda bulunucam. \u00d6ncelikle firewall nedir<\/strong>? tan\u0131m\u0131n\u0131 yapmak olduk\u00e7a faydal\u0131 olacak.<\/span><\/p>\n

Firewall Nedir?<\/span><\/strong><\/h2>\n

Masa\u00fcst\u00fc bilgisayar\u0131n\u0131zda, a\u011f\u0131n\u0131zda veya da sunucu yap\u0131n\u0131zda gelen ve giden paketlerin yaz\u0131l\u0131msal\/donan\u0131msal olarak kontrol eden ve bu paket ge\u00e7i\u015flerini belirli bir fitreleme y\u00f6ntemiyle g\u00fcvenlik unsurlar\u0131 olu\u015fturan yaz\u0131l\u0131msal ve donan\u0131msal sistemlere Firewall (g\u00fcvenlik duvar\u0131)<\/strong> denir.<\/span><\/p>\n

Genel olarak d\u0131\u015far\u0131dan a\u011fa gelecek yetkisiz ya da k\u0131s\u0131tlanm\u0131\u015f istekleri engellemek veya belirli bir fitreden s\u00fczerek ana bilgisayara ula\u015fmas\u0131n\u0131 sa\u011flamaktad\u0131r. Bu duruma fiziksel bir \u00f6nek vermemiz gerekirse; havaliman\u0131 giri\u015flerinde bulunan g\u00fcvenlik noktalar\u0131n\u0131 ele alabiliriz. Bu g\u00fcvenlik noktalar\u0131ndan ge\u00e7ebilmek i\u00e7in \u00fczerimizde bulunan metal e\u015fyalar\u0131 \u00e7\u0131kart\u0131yor ve zararl\u0131 say\u0131labilecek ara\u00e7lar\u0131 havaliman\u0131 g\u00fcvenlik noktas\u0131ndan ge\u00e7iremiyoruz. Burada esas ama\u00e7 havaliman\u0131 i\u00e7erisinde olu\u015facak g\u00fcvenlik d\u0131\u015f\u0131 unsurlar\u0131n\u0131 en aza indirmek hatta engellemektedir.<\/span><\/p>\n

Firewall yap\u0131s\u0131da<\/strong> vermi\u015f oldu\u011fumuz \u00f6rnekteki i\u015flemin bire bir ayn\u0131s\u0131n\u0131 uyarlamaktad\u0131r. A\u011fa zarar vermek yada s\u0131zmak isteyen unsurlar\u0131 engeller ve verileriniz ile beraber sistem b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fcz\u00fc koruma alt\u0131na al\u0131r.<\/span><\/p>\n

A\u00e7\u0131klama ve \u00f6rne\u011fimizi baz al\u0131rsak,network hatt\u0131n\u0131za s\u0131zmak isteyenler ile beraber ba\u011fl\u0131 olanlar\u0131 izleme imkan\u0131da sunmaktad\u0131r.<\/span><\/p>\n

\u015eimdi sunucu g\u00fcvenlik duvar\u0131na\u00a0neden ihtiya\u00e7 duydu\u011fumuzu detayland\u0131rabiliriz.<\/span><\/p>\n

\"Firewall
Firewall Nedir?<\/figcaption><\/figure>\n

Neden Firewall \u0130htiyac\u0131m\u0131z Var?<\/span><\/strong><\/h2>\n

Bir \u00e7ok son kullan\u0131c\u0131 cihazlar\u0131n\u0131n sadece vir\u00fcsler taraf\u0131ndan tehtit edildi\u011fini d\u00fc\u015f\u00fcn\u00fcr. Fakat bu durum b\u00fcy\u00fck bir yan\u0131lg\u0131d\u0131r. Cihazlar\u0131m\u0131za tehdit unsuru olu\u015fturacak ek g\u00fcvenlik unsurlar\u0131 a\u015fa\u011f\u0131daki gibidir ;<\/span><\/p>\n

\u2013 Application Backdoors (Arka plan uygulamalar\u0131)
\u2013 Dos (Denied Of Service) Servis d\u0131\u015f\u0131 ataklar\u0131
\u2013 SMTP Autof Session hacking (Eposta smtp protokol\u00fc oturum \u00e7al\u0131nmas\u0131 ve arka planda olu\u015fan spam g\u00f6nderimler.)
\u2013 \u0130\u015fletim sistemi hatalar\u0131
\u2013 Email bombs
\u2013 Source Rating (Kaynak kullan\u0131m tutars\u0131zl\u0131\u011f\u0131)
\u2013 Remote login\u00a0<\/span><\/p>\n

\"G\u00fcvenlik
G\u00fcvenlik Duvar\u0131<\/figcaption><\/figure>\n

Kullan\u0131c\u0131lar\u0131n ihtiya\u00e7lar\u0131 do\u011frultusunda firewall sunucu g\u00fcvenlik duvar\u0131\u00a0<\/strong>\u015fekillendirmesi gerekmektedir. Ba\u015fta da\u00a0belirtmi\u015f oldu\u011fumuz gibi fiziksel ve yaz\u0131l\u0131msal olarak firewall yap\u0131lar\u0131 iki farkl\u0131 gurupta \u015fekillendirilebilir.<\/span><\/p>\n

Bilgisayar\u0131n\u0131zda, ofis a\u011f\u0131n\u0131zda ya da\u00a0web server yap\u0131s\u0131nda olu\u015facak tehdit unsurlar\u0131n\u0131 sezinlemeniz ve elde edece\u011finiz verilere g\u00f6re g\u00fcvenlik duvar\u0131 \u00fcr\u00fcnlerini kullanarak g\u00fcvenlik \u00f6nlemleri almal\u0131s\u0131n\u0131z. Bu durum bile\u015fen g\u00f6zlemine, a\u011f izlenimlerine ve uygulama davran\u0131\u015flar\u0131na g\u00f6re \u015fekillendirilebilir.<\/span><\/p>\n

Bir sonraki yaz\u0131m\u0131zda en \u00e7ok tercih edilen donan\u0131msal ve yaz\u0131l\u0131msal g\u00fcvenlik<\/a> \u00fcr\u00fcnleri ve yap\u0131lar\u0131 hakk\u0131nda bilgi payla\u015fm\u0131\u015f olaca\u011f\u0131z.<\/span><\/p>\n

Faydal\u0131 olmas\u0131 dile\u011fiyle.<\/span><\/p>\n\n\n

\u0130statistiklere g\u00f6re; crack yaz\u0131l\u0131m, ters proxy, lisanss\u0131z yaz\u0131l\u0131m <\/strong>kullanan web siteleri, di\u011fer web sitelerine k\u0131yasla daha fazla risk alt\u0131ndad\u0131r. Ayr\u0131ca lisanss\u0131z panel <\/strong>kullan\u0131m\u0131 hukuki sonu\u00e7lar do\u011furur. Verilerinizi g\u00fcvenle korumak i\u00e7in orijinal lisansl\u0131 yaz\u0131l\u0131m<\/strong> kullan\u0131n ve hizmet ald\u0131\u011f\u0131n\u0131z firmadan orijinal lisans kulland\u0131klar\u0131na dair mutlaka kan\u0131tlar isteyin.<\/p>\n","protected":false},"excerpt":{"rendered":"Bu yaz\u0131m\u0131zda sekt\u00f6r\u00fcn temel g\u00fcvenlik ta\u015flar\u0131ndan olan Firewall-G\u00fcvenlik Duvar\u0131\u00a0hakk\u0131nda genel bir bilgi payla\u015f\u0131m\u0131nda bulunucam. \u00d6ncelikle firewall nedir? tan\u0131m\u0131n\u0131…\n","protected":false},"author":7,"featured_media":13192,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[53,36],"tags":[],"class_list":{"0":"post-11559","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-guvenlik","8":"category-sunucu"},"_links":{"self":[{"href":"https:\/\/www.natro.com\/blog\/wp-json\/wp\/v2\/posts\/11559","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=11559"}],"version-history":[{"count":3,"href":"https:\/\/www.natro.com\/blog\/wp-json\/wp\/v2\/posts\/11559\/revisions"}],"predecessor-version":[{"id":33180,"href":"https:\/\/www.natro.com\/blog\/wp-json\/wp\/v2\/posts\/11559\/revisions\/33180"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.natro.com\/blog\/wp-json\/wp\/v2\/media\/13192"}],"wp:attachment":[{"href":"https:\/\/www.natro.com\/blog\/wp-json\/wp\/v2\/media?parent=11559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.natro.com\/blog\/wp-json\/wp\/v2\/categories?post=11559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.natro.com\/blog\/wp-json\/wp\/v2\/tags?post=11559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}