{"id":2608,"date":"2022-11-29T08:00:00","date_gmt":"2022-11-29T05:00:00","guid":{"rendered":"https:\/\/www.daha.net\/blog\/sunucu-guvenligi-hakkinda-her-sey\/"},"modified":"2026-06-30T23:50:35","modified_gmt":"2026-06-30T20:50:35","slug":"sunucu-guvenligi-hakkinda-her-sey","status":"publish","type":"post","link":"https:\/\/www.daha.net\/blog\/sunucu-guvenligi-hakkinda-her-sey\/","title":{"rendered":"Sunucu G\u00fcvenli\u011fi Hakk\u0131nda Her \u015eey"},"content":{"rendered":"\n<div class=\"wp-block-yoast-seo-table-of-contents yoast-table-of-contents\"><h2>\u0130\u00e7indekiler<\/h2><ul><li><a href=\"\/blog\/#h-sunucu-guvenligi-nedir\" data-level=\"2\">Sunucu G\u00fcvenli\u011fi Nedir?<\/a><\/li><li><a href=\"\/blog\/#h-sunucu-guvenligi-nasil-saglanir\" data-level=\"2\">Sunucu G\u00fcvenli\u011fi Nas\u0131l Sa\u011flan\u0131r?<\/a><\/li><li><a href=\"\/blog\/#h-kendi-sunucunuza-sahip-olmalisiniz\" data-level=\"2\">Kendi Sunucunuza Sahip Olmal\u0131s\u0131n\u0131z<\/a><\/li><li><a href=\"\/blog\/#h-root-girisini-engellemelisiniz\" data-level=\"2\">Root Giri\u015fini Engellemelisiniz<\/a><ul><li><a href=\"\/blog\/#h-ssh-portunu-degistirmelisiniz\" data-level=\"3\">SSH Portunu De\u011fi\u015ftirmelisiniz<\/a><\/li><li><a href=\"\/blog\/#h-ssh-anahtar-cifti-kullanmalisiniz\" data-level=\"3\">SSH Anahtar \u00c7ifti Kullanmal\u0131s\u0131n\u0131z<\/a><\/li><li><a href=\"\/blog\/#h-sunucuya-giris-islemlerine-sinirlama-getirmelisiniz\" data-level=\"3\">Sunucuya Giri\u015f \u0130\u015flemlerine S\u0131n\u0131rlama Getirmelisiniz<\/a><\/li><li><a href=\"\/blog\/#h-firewall-kurulumunu-ihmal-etmemelisiniz\" data-level=\"3\">Firewall Kurulumunu \u0130hmal Etmemelisiniz<\/a><\/li><li><a href=\"\/blog\/#h-gereksiz-servisleri-ve-kullanmadiginiz-portlari-kapatmalisiniz\" data-level=\"3\">Gereksiz Servisleri ve Kullanmad\u0131\u011f\u0131n\u0131z Portlar\u0131 Kapatmal\u0131s\u0131n\u0131z<\/a><\/li><li><a href=\"\/blog\/#h-guvenlik-gunluklerini-takip-etmelisiniz\" data-level=\"3\">G\u00fcvenlik G\u00fcnl\u00fcklerini Takip Etmelisiniz<\/a><\/li><li><a href=\"\/blog\/#h-sunucudaki-guvenlik-aciklari-nasil-anlasilir\" data-level=\"3\">Sunucudaki G\u00fcvenlik A\u00e7\u0131klar\u0131 Nas\u0131l Anla\u015f\u0131l\u0131r?<\/a><\/li><li><a href=\"\/blog\/#h-sunucu-guvenligi-hakkinda-nelere-dikkat-etmek-gerekir\" data-level=\"3\">Sunucu G\u00fcvenli\u011fi Hakk\u0131nda Nelere Dikkat Etmek Gerekir?<\/a><\/li><\/ul><\/li><\/ul><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u0130\u00e7inde ya\u015fad\u0131\u011f\u0131m\u0131z teknoloji \u00e7a\u011f\u0131 her alanda veri g\u00fcvenli\u011fini \u00f6nemli hale getiriyor. Teknolojik \u00fcr\u00fcnler \u00fczerinden yapt\u0131\u011f\u0131m\u0131z her i\u015flem dijital verilerle ilerlemekte. \u0130nternet teknolojileri s\u00f6z konusu oldu\u011funda veri g\u00fcvenli\u011fi \u00e7ok daha kritik bir \u00f6neme sahip. \u00c7\u00fcnk\u00fc ba\u015fta siber sald\u0131r\u0131lar olmak \u00fczere veri g\u00fcvenli\u011fini riske sokan bir\u00e7ok tehdit mevcut. \u0130nternet \u00fczerinden yay\u0131n yapan web siteler i\u00e7in sunucu g\u00fcvenli\u011fi de bu ba\u011flamda \u00f6nemli bir konudur. Sunucuda olu\u015facak g\u00fcvenlik a\u00e7\u0131klar\u0131 web siteler ve kullan\u0131c\u0131lar i\u00e7in telafisi imkans\u0131z sonu\u00e7lar do\u011furabilmekte. Peki sunucu g\u00fcvenli\u011fi nedir ve nas\u0131l sa\u011flan\u0131r? Sunucudaki g\u00fcvenlik a\u00e7\u0131klar\u0131 nas\u0131l anla\u015f\u0131l\u0131r? Sunucu g\u00fcvenli\u011fi hakk\u0131nda nelere dikkat etmek gerekir? Bu yaz\u0131m\u0131zda sunucu g\u00fcvenli\u011fi hakk\u0131nda faydal\u0131 bilgiler payla\u015faca\u011f\u0131z ve bu sorulara k\u0131sa cevaplar verece\u011fiz.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-sunucu-guvenligi-nedir\">Sunucu G\u00fcvenli\u011fi Nedir?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">K\u0131saca ifade etmek gerekirse sunucu g\u00fcvenli\u011fi, sunucuda tutulan veri ve kaynaklar\u0131n korunmas\u0131d\u0131r. Sunucular asl\u0131nda internet a\u011flar\u0131 \u00fczerinden kullan\u0131c\u0131lara farkl\u0131 eri\u015fim imkanlar\u0131 sunan \u00f6zel birtak\u0131m bilgisayar sistemleridir. Eri\u015fim imkanlar\u0131 i\u00e7inde web sitesiyle ilgili t\u00fcm i\u015flemler yer al\u0131r. Sayfa g\u00f6r\u00fcnt\u00fcleme, e-posta g\u00f6nderimi ve di\u011fer t\u00fcm i\u015flemlerin ger\u00e7ekle\u015fmesi i\u00e7in sunucunun sorunsuz \u015fekilde \u00e7al\u0131\u015fmas\u0131 gerekir. Bunun i\u00e7in de baz\u0131 veri ve kaynaklar\u0131n sunucuda korunmas\u0131 \u015fartt\u0131r. Sunucu g\u00fcvenli\u011fini tehdit eden durumlar web sitelerin internet operasyonlar\u0131na zarar verir. Sunucuda depolanan verilerin \u00fc\u00e7\u00fcnc\u00fc ki\u015filerin ellerine ge\u00e7mesi bir\u00e7ok kayba neden olur.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sunucu g\u00fcvenli\u011fi olu\u015fturma g\u00fcn\u00fcm\u00fczde web teknolojileri alan\u0131nda en \u00f6nemli konulardan biridir. Nitekim siber sald\u0131r\u0131lar s\u0131ras\u0131nda sunucu kontrol\u00fcn\u00fcn kaybedilmesi, veri g\u00fcvenli\u011fi ve web hizmetleri a\u00e7\u0131s\u0131ndan ciddi bir sorundur. Bu t\u00fcr durumlarla kar\u015f\u0131la\u015fmamak i\u00e7in devlet kurumlar\u0131n\u0131n hepsinde belirli bir sunucu g\u00fcvenli\u011fi politikas\u0131 vard\u0131r. Bu politikalar sayesinde g\u00fcvenli sunucu deneyimini sa\u011flama y\u00f6ntemleri ba\u015far\u0131l\u0131 \u015fekilde hayata ge\u00e7er. Ayr\u0131ca b\u00fcy\u00fck web sitelerin de kendilerine \u00f6zg\u00fc sunucu g\u00fcvenli\u011fi ilke ve prosesleri mevcuttur. Ba\u015fta online al\u0131\u015fveri\u015f siteleri olmak \u00fczere b\u00fcy\u00fck sitelerin hemen hepsi kendi ilke ve proseslerini kullanarak sunucu g\u00fcvenli\u011fini \u00fcst seviyede tutmaya \u00e7al\u0131\u015f\u0131r. Sunucu optimizasyonu kapsam\u0131nda gerekli iyile\u015ftirmeleri ger\u00e7ekle\u015ftirirler.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-sunucu-guvenligi-nasil-saglanir\">Sunucu G\u00fcvenli\u011fi Nas\u0131l Sa\u011flan\u0131r?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Son y\u0131llarda artan siber sald\u0131r\u0131lar, veri g\u00fcvenli\u011fi konusunu daha da \u00f6nemli hale getirdi. Bilgisayar korsanl\u0131\u011f\u0131yla m\u00fccadelede bug\u00fcne kadar bir\u00e7ok \u00e7al\u0131\u015fma ger\u00e7ekle\u015ftirildi. Fakat veri g\u00fcvenli\u011fi konusunda hen\u00fcz yeterli d\u00fczeye eri\u015fti\u011fimizi s\u00f6yleyemeyiz. Siber g\u00fcvenlik \u00f6nlemlerinin en etkin \u015fekilde uyguland\u0131\u011f\u0131 sitelerin bile bu sald\u0131r\u0131lardan zarar g\u00f6rmesi, veri g\u00fcvenli\u011fi konusunda ne denli ciddi bir sorunla kar\u015f\u0131 kar\u015f\u0131ya oldu\u011fumuzu g\u00f6steriyor. Devletlerin \u00e7e\u015fitli birimlerinin internet operasyonlar\u0131n\u0131 bile kesintiye u\u011fratan bu sald\u0131r\u0131lar, veri kontrol\u00fcn\u00fcn ne kadar zor oldu\u011funu g\u00f6rmemizi sa\u011fl\u0131yor. Hal b\u00f6yle olunca sunucu g\u00fcvenli\u011fi e\u011fitimi ve benzeri konulara ilgi giderek art\u0131yor.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Yaz\u0131m\u0131z\u0131n bu k\u0131sm\u0131nda sunucu g\u00fcvenli\u011fi prosed\u00fcr\u00fc hakk\u0131nda baz\u0131 noktalara k\u0131saca i\u015faret edece\u011fiz. Sunucu g\u00fcvenli\u011fi nas\u0131l sa\u011flan\u0131r diye merak edenler a\u015fa\u011f\u0131daki y\u00f6ntemlere mutlaka dikkat etmeli. Ve bu y\u00f6ntemlerin belli bir b\u00fct\u00fcnsellik i\u00e7erdi\u011fini de unutmamal\u0131. Nitekim sunucu g\u00fcvenli\u011fi y\u00f6netim sistemi farkl\u0131 bile\u015fenlerden olu\u015fan karma\u015f\u0131k bir sistemdir. Bu bile\u015fenlerden her biri sunucu g\u00fcvenli\u011fi hakk\u0131nda etkili ve pratik \u00e7\u00f6z\u00fcmler sa\u011flar. Ancak bir noktada olu\u015fan k\u00fc\u00e7\u00fck bir ihmalin bile t\u00fcm emeklerin bo\u015fa gitmesine yol a\u00e7mas\u0131 m\u00fcmk\u00fcnd\u00fcr. Bu konularda dilerseniz servis sa\u011flay\u0131c\u0131n\u0131zdan da destek alabilirsiniz. B\u00f6ylelikle olas\u0131 riskleri minimalize etmede avantaj elde edersiniz.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-kendi-sunucunuza-sahip-olmalisiniz\">Kendi Sunucunuza Sahip Olmal\u0131s\u0131n\u0131z<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Web siteler hangi alanda faaliyet g\u00f6sterirlerse g\u00f6stersinler, siber sald\u0131r\u0131lara maruz kalma riskine her zaman sahiptirler. Sitelerin faaliyet alanlar\u0131 veya g\u00fcnl\u00fck trafikleri bu riskleri do\u011frudan etkilemez. Fakat \u015fu da bir ger\u00e7ek ki siber sald\u0131r\u0131lar daha \u00e7ok \u00f6nemli veriler bar\u0131nd\u0131ran ve y\u00fcksek trafi\u011fe sahip siteleri hedef al\u0131yor. Bu bak\u0131mdan \u00f6rne\u011fin kamu kurum ve kurulu\u015flar\u0131na ait sitelerin sunucular\u0131n\u0131n siber sald\u0131r\u0131 riskleri daha y\u00fcksektir. Ayr\u0131ca bankalar, online al\u0131\u015fveri\u015f siteleri, sosyal platformlarda da benzer bir durum s\u00f6z konusudur. Bu nedenle \u201cG\u00fcvenli sunucu nedir?\u201d sorusu bu t\u00fcr web siteleri ve kullan\u0131c\u0131lar\u0131 i\u00e7in kritik bir \u00f6neme sahiptir. Bu t\u00fcr sitelerde sunucu g\u00fcvenli\u011fi hakk\u0131nda t\u00fcm \u00f6nlemlerin eksiksiz olarak kar\u015f\u0131lanmas\u0131 gerekir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sunucu g\u00fcvenli\u011fi hakk\u0131nda en etkili y\u00f6ntemlerin ba\u015f\u0131nda kendi sunucunuza sahip olma geliyor. B\u00f6ylelikle sunucu \u00fczerinde ba\u015fkalar\u0131n\u0131n i\u015flem yapmas\u0131n\u0131 do\u011fal olarak engellersiniz. Payla\u015f\u0131ml\u0131 hosting ve benzeri hizmetlerde ayn\u0131 sunucu farkl\u0131 siteler taraf\u0131ndan kullan\u0131l\u0131r. Bu da veri g\u00fcvenli\u011fi a\u00e7\u0131s\u0131ndan kritik \u00f6neme sahip siteler i\u00e7in g\u00fcvenlik a\u00e7\u0131\u011f\u0131 meydana getirir. Sitenizi e\u011fer sadece firman\u0131z\u0131n tan\u0131t\u0131m\u0131 amac\u0131yla kullan\u0131yor, kullan\u0131c\u0131lar\u0131n\u0131za ili\u015fkin hi\u00e7bir veri kayd\u0131 tutmuyorsan\u0131z kendi sunucunuza sahip olman\u0131z gerekmeyebilir. Fakat \u00f6rne\u011fin e-ticaret siteleri, sosyal platformlar ve benzeri sitelerin kendilerine ait \u00f6zel sunucular\u0131na sahip olmas\u0131 sunucu g\u00fcvenli\u011fi hakk\u0131nda en etkili y\u00f6ntemlerden biridir. Bu sayede sunucuya kontrol\u00fcn\u00fcz d\u0131\u015f\u0131ndaki m\u00fcdahaleleri \u00f6nlemede avantaj elde edersiniz. Sunucudaki g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131n tespiti ve giderilmesi konusunda da daha h\u0131zl\u0131 aksiyon al\u0131rs\u0131n\u0131z.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-root-girisini-engellemelisiniz\">Root Giri\u015fini Engellemelisiniz<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Kendi sunucunuza sahip olman\u0131z, sunucu g\u00fcvenli\u011fi hakk\u0131nda gerekli ve etkili bir y\u00f6ntemdir. Fakat yeterli de\u011fildir. Sunucu kullan\u0131m\u0131na da dikkat etmeniz gerekir. Sunucunuzu sat\u0131n ald\u0131\u011f\u0131n\u0131zda i\u015fletim sistemi i\u00e7erisinde kurulu halde gelecektir. Ayr\u0131ca sunucuya eri\u015fim i\u00e7in root kullan\u0131c\u0131s\u0131 parolas\u0131 verilecektir. Root kullan\u0131c\u0131 nedir diye merak ediyorsan\u0131z k\u0131saca k\u00f6k kullan\u0131c\u0131d\u0131r diyebiliriz. Bu kullan\u0131c\u0131 <strong><a href=\"https:\/\/www.daha.net\/blog\/sunucu\/\">web sunucu<\/a><\/strong> i\u015flemleri \u00fczerinde yetki sahibi esas kullan\u0131c\u0131d\u0131r. Root kullan\u0131c\u0131 ad\u0131 sabittir, bunu tahmin etmek zor de\u011fildir. Root parolas\u0131n\u0131n ise \u00e7\u00f6z\u00fclmesi ne kadar zor olursa sa\u011flayaca\u011f\u0131 g\u00fcvence o kadar y\u00fcksek olur. Siber sald\u0131r\u0131 s\u0131ras\u0131nda root parolan\u0131z\u0131n \u00e7\u00f6z\u00fclmesi sunucu g\u00fcvenli\u011fi hakk\u0131nda en k\u00f6t\u00fc sonu\u00e7lara sebebiyet verebilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sunucunuza root giri\u015fini engellemek i\u00e7in \u015funlar\u0131 yapabilirsiniz. \u00d6ncelikle root \u00fczerinden SSH ekran\u0131na giri\u015f yap\u0131n. Ard\u0131ndan sudo yetkisine sahip bir kullan\u0131c\u0131 olu\u015fturun. Bunu yapmak i\u00e7in SSH\u2019a \u015fu komutlar\u0131 yazman\u0131z gerekir: $ adduser demo, $ passwd demo, $ gpasswd -a demo whell. Bu komutlardan ilki yeni kullan\u0131c\u0131 ekler. \u0130kincisi, yeni kullan\u0131c\u0131n\u0131n parolas\u0131n\u0131 belirler. \u00dc\u00e7\u00fcnc\u00fcs\u00fc ise yeni kullan\u0131c\u0131ya root yetkisi verir. Bu i\u015flemin ard\u0131ndan root ile sisteme giri\u015fi engellemeniz gerekir. Bunun da yolu SSH\u2019a uzaktan ba\u011flanmay\u0131 sa\u011flayan SSH daemon ayar\u0131n\u0131 de\u011fi\u015ftirmektir. Bunu yapmak i\u00e7in \/etc\/ssh\/sshd_config dosyas\u0131n\u0131 metin d\u00fczenleyiciyle a\u00e7\u0131n. Kar\u015f\u0131n\u0131za, Brada #PermitRootLogin yes \u015feklinde bir sat\u0131r \u00e7\u0131kacak. Bu sat\u0131r\u0131, [php]PermitRootLogin no[\/php] komutuyla de\u011fi\u015ftirin. Ard\u0131ndan SSH\u2019\u0131 yeniden ba\u015flat\u0131n. Bunu yapmak i\u00e7in $ systemctl reload sshd komutunu yazman\u0131z yeterli.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu i\u015flemlerin ard\u0131ndan sunucuya SSH \u00fczerinden ba\u011flanma imkan\u0131 ortadan kalkar. E\u011fer sadece bir kullan\u0131c\u0131ya eri\u015fim izni tan\u0131mlamak istiyorsan\u0131z ilgili k\u0131sma AllowUsers demo komutunu yazabilirsiniz. Sunucuya eri\u015fmek i\u00e7in kullanaca\u011f\u0131n\u0131z komut ise $ ssh demo@SERVER_IP_ADDRESS komutu olacakt\u0131r.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-ssh-portunu-degistirmelisiniz\">SSH Portunu De\u011fi\u015ftirmelisiniz<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sunucu g\u00fcvenli\u011fi hakk\u0131nda \u00f6nemli konulardan biri de SSH portu g\u00fcvenli\u011fidir. 22 numaral\u0131 SSH portu siber sald\u0131r\u0131lar s\u0131ras\u0131nda en \u00f6nemli hedef noktalar\u0131ndan biridir. Bu portun varsay\u0131lan numaras\u0131n\u0131 de\u011fi\u015ftirirseniz port g\u00fcvenli\u011fi a\u00e7\u0131s\u0131ndan avantaj elde edersiniz. Nitekim varsay\u0131lan port numaras\u0131 siber sald\u0131r\u0131lar\u0131 \u00f6nlemede yetersiz kalmakta.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu de\u011fi\u015fimi \u015fu \u015fekilde kolayca ger\u00e7ekle\u015ftirmeniz m\u00fcmk\u00fcn. \u00d6ncelikle SSH ile sunucuya ba\u011flan\u0131n. Ard\u0131ndan SSH config dosyas\u0131n\u0131 metin d\u00fczenleyiciyle a\u00e7\u0131n. Dosyan\u0131n i\u00e7inde # Port 22 yazan sat\u0131r\u0131 bulun. Bu k\u0131s\u0131mda # i\u015faretini kald\u0131r\u0131p 0 ile 65535 aras\u0131nda diledi\u011finiz bir say\u0131y\u0131 yaz\u0131n. Daha sonra SSH\u2019\u0131 yeniden ba\u015flat\u0131n. B\u00f6ylelikle SSH port de\u011fi\u015fikli\u011fi sorunsuz \u015fekilde ger\u00e7ekle\u015fecektir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-ssh-anahtar-cifti-kullanmalisiniz\">SSH Anahtar \u00c7ifti Kullanmal\u0131s\u0131n\u0131z<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sunucu g\u00fcvenli\u011fi hakk\u0131nda en etkili y\u00f6ntemlerden bir di\u011feri de SSH anahtar \u00e7ifti kullan\u0131m\u0131d\u0131r. SSH giri\u015f i\u015flemlerinde kullan\u0131c\u0131 ad\u0131 ve \u015fifresi kullan\u0131l\u0131r. Oysa \u00f6zel birtak\u0131m tahmin algoritmalar\u0131 sayesinde bu bilgileri de\u015fifre etmek imkans\u0131z de\u011fildir. En karma\u015f\u0131k \u015fifreleri bile deneme yan\u0131lma y\u00f6ntemiyle k\u0131rmak m\u00fcmk\u00fcnd\u00fcr. Fakat SSH anahtar \u00e7ifti \u00e7ok daha g\u00fcvenli bir sunucu deneyimi sa\u011flar. \u00c7\u00fcnk\u00fc kullan\u0131c\u0131 ad\u0131 ve \u015fifre kullan\u0131m\u0131n\u0131 ortadan kald\u0131r\u0131r. Web sunucu g\u00fcvenli\u011fi ba\u011flam\u0131nda SSH anahtar \u00e7iftinin en \u00f6nemli \u00f6zelli\u011fi, bilgisayar\u0131n\u0131za y\u00fckl\u00fc program ile sunucunun e\u015fle\u015fmesini sa\u011flamas\u0131d\u0131r. Program\u0131 \u00e7al\u0131\u015ft\u0131rd\u0131\u011f\u0131n\u0131zda sistem kar\u015f\u0131n\u0131za \u00f6zel bir kod \u00e7\u0131kar\u0131r. Bu kodu kullanarak sunucunuza g\u00fcvenli \u015fekilde eri\u015fim sa\u011flaman\u0131z m\u00fcmk\u00fcn.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-sunucuya-giris-islemlerine-sinirlama-getirmelisiniz\">Sunucuya Giri\u015f \u0130\u015flemlerine S\u0131n\u0131rlama Getirmelisiniz<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sunucu g\u00fcvenli\u011fi hakk\u0131nda faydal\u0131 y\u00f6ntemlerden biri de sunucuya giri\u015f s\u0131ras\u0131nda ger\u00e7ekle\u015fecek deneme say\u0131s\u0131n\u0131 s\u0131n\u0131rlamakt\u0131r. Fail2Ban olarak bilinen bu s\u0131n\u0131rlama, sunuculara y\u00f6nelik siber sald\u0131r\u0131lara kar\u015f\u0131 etkili bir y\u00f6ntemdir. \u00d6rne\u011fin DDoS ve benzeri sald\u0131r\u0131larda sunucuya giri\u015f i\u00e7in \u00e7ok say\u0131da deneme ger\u00e7ekle\u015fir. Giri\u015f \u015fifresi zay\u0131f olan sunucular\u0131n kontrol\u00fcn\u00fcn bu denemeler s\u0131ras\u0131nda kayb\u0131 m\u00fcmk\u00fcnd\u00fcr. Sunucu g\u00fcvenli\u011fini sa\u011flamak bu t\u00fcr sald\u0131r\u0131lar kar\u015f\u0131s\u0131nda her zaman kolay de\u011fildir. En g\u00fc\u00e7l\u00fc \u015fifreler bile baz\u0131 durumlarda kolayca \u00e7\u00f6z\u00fcl\u00fcr. Bu t\u00fcr durumlar\u0131 engellemek i\u00e7in sunucuya giri\u015f i\u015flemlerine s\u0131n\u0131rlama getirmeniz faydal\u0131 olacakt\u0131r. Sunucu g\u00fcvenli\u011fi nas\u0131l sa\u011flan\u0131r diye merak edenler i\u00e7in Fail2Ban uygulamas\u0131 iyi bir alternatiftir. Bu program\u0131 kullanarak sunucuya giri\u015f i\u015flemlerinde maksimum deneme say\u0131s\u0131n\u0131 kolayca s\u0131n\u0131rlaman\u0131z m\u00fcmk\u00fcn.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-firewall-kurulumunu-ihmal-etmemelisiniz\">Firewall Kurulumunu \u0130hmal Etmemelisiniz<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">G\u00fcvenli sunucu nedir diye merak edenler sunucu g\u00fcvenli\u011fi hakk\u0131nda firewall kurulumuna da \u00f6zellikle dikkat etmeli. \u00c7\u00fcnk\u00fc firewall yani g\u00fcvenlik duvar\u0131 uygulamalar\u0131 sunucuda yer alan g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 \u00f6nlemede \u00e7ok faydal\u0131d\u0131r. K\u0131saca ifade etmek gerekirse sunucu g\u00fcvenlik duvar\u0131 bir t\u00fcr antivir\u00fcs program\u0131 gibidir. Sistem kaynaklar\u0131n\u0131n k\u00f6t\u00fc ama\u00e7l\u0131 kullan\u0131lmas\u0131n\u0131 \u00f6nler. B\u00f6ylelikle a\u011f g\u00fcvenli\u011fi artar. Sunucu g\u00fcvenli\u011fi \u015fartlar\u0131 iyile\u015fir. K\u00f6t\u00fc ama\u00e7l\u0131 kullan\u0131mlar ve online istismarlara kar\u015f\u0131 diren\u00e7 artar.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Asl\u0131na bakarsan\u0131z, sunucu g\u00fcvenli\u011fi ayarlar\u0131 i\u00e7inde firewall tek ba\u015f\u0131na yeterli bir uygulama de\u011fildir. Fakat koruma \u00f6nlemleri i\u00e7inde \u00f6nemli bir pay sahibidir. Kullan\u0131m\u0131n\u0131n kolay olmas\u0131 da sunucu g\u00fcvenli\u011fi hakk\u0131nda \u00f6nemli bir tercih nedenidir. G\u00fcn\u00fcm\u00fczde sunucu g\u00fcvenli\u011fi uzmanl\u0131\u011f\u0131 firewall kullan\u0131m\u0131 hakk\u0131nda derinlemesine bilgi sahibi olmay\u0131 gerektirmektedir. Nitekim sunucu g\u00fcvenli\u011fi e\u011fitimleri i\u00e7inde firewall kullan\u0131m\u0131 \u00f6nemli bir yer tutar. Ancak firewall kullan\u0131m\u0131na biz burada daha fazla yer vermeyece\u011fiz. Bu konu hakk\u0131nda merak ettiklerinizi <strong><a href=\"https:\/\/www.daha.net\/blog\/firewall-nedir\/\">Firewall Nedir? Donan\u0131msal Firewall Nedir?<\/a><\/strong> yaz\u0131m\u0131zda bulabilirsiniz.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-gereksiz-servisleri-ve-kullanmadiginiz-portlari-kapatmalisiniz\">Gereksiz Servisleri ve Kullanmad\u0131\u011f\u0131n\u0131z Portlar\u0131 Kapatmal\u0131s\u0131n\u0131z<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0130leri teknoloji \u00fcr\u00fcn\u00fc sunucularda bar\u0131nd\u0131rma hizmetlerinin ger\u00e7ekle\u015fmesi i\u00e7in \u00e7ok say\u0131da servis mevcuttur. Bu servislerin bir k\u0131sm\u0131 sunucunun kesintisiz ve h\u0131zl\u0131 \u00e7al\u0131\u015fmas\u0131na yard\u0131mc\u0131 olur. Fakat bir k\u0131sm\u0131 web sitenin hi\u00e7 ihtiya\u00e7 duymad\u0131\u011f\u0131 \u00e7\u00f6z\u00fcmler i\u00e7erir. Sunucu servislerinin say\u0131s\u0131 artt\u0131k\u00e7a hangilerinin d\u00fczg\u00fcn \u00e7al\u0131\u015f\u0131p hangilerinin g\u00fcvenlik a\u00e7\u0131\u011f\u0131 meydana getirdi\u011fini takip etmek zorla\u015f\u0131r. Yeni bir servisin a\u00e7\u0131l\u0131p a\u00e7\u0131lmad\u0131\u011f\u0131n\u0131 takip etmek de bazen zorla\u015f\u0131r. Bu ba\u011flamda sunucunuz \u00fczerinde hangi servislerin \u00e7al\u0131\u015f\u0131p hangilerinin gereksiz oldu\u011funu mutlaka incelemeli ve takip etmelisiniz. Bu sayede gereksiz servisleri kapat\u0131p olas\u0131 g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 kolayca \u00f6nlersiniz. Sunucunuza ayr\u0131ca ihtiyac\u0131n\u0131z olmayan hi\u00e7bir servis y\u00fcklememelisiniz.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Di\u011fer taraftan, sunucuya giri\u015f i\u00e7in kullan\u0131lan portlar da g\u00fcvenlik ba\u011flam\u0131nda \u00f6nemli bir konudur. Sunucunuzun \u00fczerinde \u00e7ok say\u0131da port olabilir. Bu portlar\u0131n her biri bir ba\u011flant\u0131 noktas\u0131 olu\u015fturur. Fakat kullanmad\u0131\u011f\u0131n\u0131z portlar sunucuya giri\u015f konusunda risk yarat\u0131r. Sunucu g\u00fcvenli\u011fi \u00e7al\u0131\u015fmas\u0131 kapsam\u0131nda a\u00e7\u0131k portlar\u0131 kapat\u0131rsan\u0131z sunucuya kontrol\u00fcn\u00fcz d\u0131\u015f\u0131nda giri\u015fleri \u00f6nlersiniz. \u015eirketinizde veya kurumunuzda sunucu g\u00fcvenli\u011fi uzman\u0131 varsa bu konuda mutlaka aksiyon almas\u0131n\u0131 sa\u011flamal\u0131s\u0131n\u0131z. Bu sayede sunucu \u00fczerinde kritik bile\u015fenlerin ve hizmetlerin g\u00fcvenli\u011fi konusunda bir\u00e7ok riski ortadan kald\u0131r\u0131rs\u0131n\u0131z.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-guvenlik-gunluklerini-takip-etmelisiniz\">G\u00fcvenlik G\u00fcnl\u00fcklerini Takip Etmelisiniz<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sunucu g\u00fcvenli\u011fi \u00e7al\u0131\u015fmalar\u0131 i\u00e7inde \u00f6nemli ba\u015fl\u0131klardan biri de g\u00fcvenlik g\u00fcnl\u00fcklerini takip etmektir. Bu g\u00fcnl\u00fcklerin en \u00f6nemli \u00f6zelli\u011fi, belirli denetim ilkeleri \u00e7er\u00e7evesinde tan\u0131mlanan olaylar\u0131 kaydetmeleridir. B\u00f6ylelikle sunucu g\u00fcvenli\u011fi hakk\u0131nda olas\u0131 eksik ve ihmallerinizi daha kolay g\u00f6zlemlersiniz. Sunucu g\u00fcvenli\u011fi verileri ayn\u0131 zamanda da \u00e7al\u0131\u015fmalar\u0131n\u0131z\u0131n verimlili\u011fini takip etmenizi sa\u011flar. Kulland\u0131\u011f\u0131n\u0131z yaz\u0131l\u0131m veya donan\u0131mlar\u0131n performans\u0131n\u0131 de\u011ferlendirme imkan\u0131 sunar. Bu konularda yapaca\u011f\u0131n\u0131z incelemeler sunucu g\u00fcvenli\u011fi y\u00f6netim sistemi ile ilgili gerekli ad\u0131mlar\u0131 atman\u0131za yard\u0131mc\u0131 olur.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-sunucudaki-guvenlik-aciklari-nasil-anlasilir\">Sunucudaki G\u00fcvenlik A\u00e7\u0131klar\u0131 Nas\u0131l Anla\u015f\u0131l\u0131r?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sunucu g\u00fcvenli\u011fi hakk\u0131nda \u00f6nemli konulardan biri de g\u00fcvenlik a\u00e7\u0131\u011f\u0131 y\u00f6netimidir. Sunucudaki g\u00fcvenlik a\u00e7\u0131klar\u0131 nas\u0131l anla\u015f\u0131l\u0131r diye merak edenler, g\u00fcvenlik a\u00e7\u0131\u011f\u0131 y\u00f6netimi hakk\u0131nda mutlaka bilgi sahibi olmal\u0131. K\u0131saca ifade edecek olursak bu y\u00f6netim, sunucuyu ve sunucu hizmetlerini siber sald\u0131r\u0131 ve k\u00f6t\u00fc kullan\u0131mlardan koruyan \u00f6zel bir s\u00fcre\u00e7tir. Daha \u00e7ok otomatik olarak ilerleyen bu s\u00fcre\u00e7te g\u00fcvenlik programlar\u0131 \u00f6n plandad\u0131r. Bu programlar sayesinde g\u00fcvenlik \u00f6nlemlerinin zay\u0131f kald\u0131\u011f\u0131 noktalar ortaya \u00e7\u0131kar. Siber sald\u0131r\u0131 riskleri s\u0131ras\u0131nda olu\u015facak kay\u0131plar\u0131n minimum d\u00fczeyde kalmas\u0131 sa\u011flan\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u015eirketlerde veya kurumlarda g\u00fcvenlik a\u00e7\u0131\u011f\u0131 y\u00f6netiminin ilk a\u015famas\u0131 envanter d\u00f6k\u00fcm\u00fcd\u00fcr. Bu a\u015famada sunucunun yan\u0131 s\u0131ra di\u011fer t\u00fcm cihaz ve ilgili yaz\u0131l\u0131mlar\u0131n kay\u0131tlar\u0131 tutulur. Envanter y\u00f6netim sistemi, ileride olu\u015facak kar\u0131\u015f\u0131kl\u0131klar\u0131 \u00f6nlemenin en etkili y\u00f6ntemlerinden biridir. \u0130kinci a\u015famada, g\u00fcvenlik a\u00e7\u0131\u011f\u0131 tarama testleri devreye girer. Bu testler, bir dizi tarama program\u0131ndan olu\u015fur. Sistemin zay\u0131f veya aksayan noktalar\u0131n\u0131 tespit etmeyi sa\u011flar. \u00dc\u00e7\u00fcnc\u00fc a\u015famada g\u00fcncelleme kontrol\u00fc ger\u00e7ekle\u015ftirebilirsiniz. Bu ama\u00e7la geli\u015ftirilen yama y\u00f6netimi yaz\u0131l\u0131mlar\u0131 gerekli kontrolleri kolayca sa\u011flar. Ayn\u0131 zamanda da yamalar\u0131n da\u011f\u0131t\u0131m\u0131n\u0131 ger\u00e7ekle\u015ftirir. B\u00f6ylelikle t\u00fcm cihazlarda sunucu g\u00fcvenli\u011fi hakk\u0131nda gerekli iyile\u015ftirmeleri h\u0131zland\u0131r\u0131r. Son ad\u0131mda ise yap\u0131land\u0131rma y\u00f6netimiyle cihazlar\u0131n g\u00fcvenli \u015fekilde yap\u0131land\u0131r\u0131lmas\u0131n\u0131 sa\u011flayabilirsiniz.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-sunucu-guvenligi-hakkinda-nelere-dikkat-etmek-gerekir\">Sunucu G\u00fcvenli\u011fi Hakk\u0131nda Nelere Dikkat Etmek Gerekir?<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Her \u015feyden \u00f6nce \u015firketiniz veya kurumunuz i\u00e7in \u00f6zel bir g\u00fcvenlik a\u00e7\u0131\u011f\u0131 y\u00f6netim sistemi olu\u015fturmal\u0131s\u0131n\u0131z. Sunucu g\u00fcvenli\u011fi \u00f6l\u00e7e\u011fi ne kadar kapsaml\u0131 olursa o kadar ba\u015far\u0131l\u0131 olur. Bu sistemin d\u00fczg\u00fcn \u00e7al\u0131\u015fmas\u0131 sunucu g\u00fcvenli\u011fi hakk\u0131nda bir\u00e7ok kazan\u0131ma kolayca ula\u015fman\u0131z\u0131 sa\u011flar.<\/li>\n\n\n\n<li>Farkl\u0131 lokasyonlarda hizmet veren ba\u011fl\u0131 birimler aras\u0131ndaki g\u00f6rev da\u011f\u0131l\u0131m\u0131n\u0131 incelemelisiniz. <a href=\"https:\/\/www.daha.net\/hosting\/cpanel-hosting\/\"><strong>cPanel kullan\u0131m\u0131<\/strong> <\/a>ve benzeri eri\u015fim izin ve yetkileri konusunda herhangi bir karma\u015fa olu\u015fmas\u0131n\u0131 mutlaka \u00f6nlemelisiniz. Bu ama\u00e7la dilerseniz \u015firketiniz veya kurumunuz i\u00e7in sunucu g\u00fcvenli\u011fi rehberi haz\u0131rlayabilirsiniz.<\/li>\n\n\n\n<li>Sunucuya giri\u015f izninin kimlerde olaca\u011f\u0131 ve sunucu g\u00fcncellemelerinin nas\u0131l yap\u0131laca\u011f\u0131 hakk\u0131nda kesin kurallar\u0131n\u0131z olmal\u0131. Bu kurallar sunucu g\u00fcvenli\u011fi \u00f6rnekleri konusunda daha ba\u015far\u0131l\u0131 ad\u0131mlar atman\u0131za yard\u0131mc\u0131 olur.<\/li>\n\n\n\n<li>G\u00fcvenlik a\u00e7\u0131\u011f\u0131 tarama testlerini ihmal etmemeli, belirli bir program \u00e7er\u00e7evesinde bunlar\u0131 rutin olarak ger\u00e7ekle\u015ftirmelisiniz. Testlerin sonu\u00e7lar\u0131n\u0131 dikkatle incelemeli, olas\u0131 s\u0131zmalara kar\u015f\u0131 h\u0131zl\u0131ca \u00f6nlem almal\u0131s\u0131n\u0131z. Uygulayaca\u011f\u0131n\u0131z s\u0131zma testleri, siber sald\u0131r\u0131lar kar\u015f\u0131s\u0131nda olu\u015facak durumlar hakk\u0131nda \u00f6nemli veriler sa\u011flar. Siber sald\u0131r\u0131lar\u0131 ger\u00e7ek zamanl\u0131 olarak sim\u00fcle ederek olas\u0131 g\u00fcvenlik istismarlar\u0131n\u0131n kaynak noktalar\u0131n\u0131 tespit eder. Bu tespit \u0131\u015f\u0131\u011f\u0131nda sunucu g\u00fcvenli\u011fi g\u00f6revleri i\u00e7inde aksayan konular\u0131 \u00e7\u00f6zmeniz kolayla\u015f\u0131r.<\/li>\n\n\n\n<li>Kullan\u0131c\u0131 hesaplar\u0131 ve \u015fifreler konusunda ilgili personelin fark\u0131ndal\u0131klar\u0131n\u0131 canl\u0131 tutmal\u0131s\u0131n\u0131z. SSH anahtar \u00e7ifti kullan\u0131m\u0131n\u0131 te\u015fvik etmeniz bu ba\u011flamda \u00e7ok daha etkili bir y\u00f6ntemdir. Ayr\u0131ca dahili sistemlere ba\u011flanmaya \u00e7al\u0131\u015fan cihazlar\u0131 tan\u0131mak i\u00e7in SIEM yaz\u0131l\u0131m\u0131 kullanabilirsiniz.<\/li>\n\n\n\n<li>A\u011f\u0131n\u0131zda yer alan t\u00fcm bilgisayarlar\u0131 en son g\u00fcvenlik yamalar\u0131yla g\u00fcncel tutmal\u0131s\u0131n\u0131z. G\u00fcvenlik g\u00fcncellemelerinde eksik varsa ilgili kullan\u0131c\u0131ya konu hakk\u0131nda bilgi vermelisiniz. Uygun bir yama y\u00f6netimi yaz\u0131l\u0131m\u0131 kullan\u0131rsan\u0131z sunucu g\u00fcvenli\u011fi hakk\u0131nda daha ba\u015far\u0131l\u0131 sonu\u00e7lara ula\u015f\u0131rs\u0131n\u0131z.<\/li>\n\n\n\n<li>Sunucuya eri\u015fim izni olan bilgisayarlar\u0131n g\u00fcvenlik ayarlar\u0131ndaki de\u011fi\u015fiklikleri izlemelisiniz. B\u00f6ylelikle sistemde g\u00fcvenlik a\u00e7\u0131\u011f\u0131 yarat\u0131p yaratmad\u0131klar\u0131n\u0131 daha h\u0131zl\u0131 \u015fekilde tespit edersiniz.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00fczeltme eylemlerinin sunucu g\u00fcvenli\u011fi ayarlama proseslerine uygun oldu\u011fundan emin olmal\u0131s\u0131n\u0131z. Bu takibi sa\u011flamak i\u00e7in raporlama hizmetlerinden yararlanman\u0131z m\u00fcmk\u00fcn. Sunucu g\u00fcvenli\u011fi raporu olu\u015fturma ve takip i\u015flerini d\u00fczenli \u015fekilde yaparsan\u0131z sorunlar\u0131n \u00e7\u0131k\u0131\u015f noktas\u0131n\u0131 daha kolay tespit edersiniz.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sunucular\u0131n\u0131z\u0131n g\u00fcvenli\u011fi hakk\u0131nda bilgiler ve sunucu g\u00fcvenli\u011fi \u00f6nlemlerinin ileri okuma notlar\u0131 daha.net Blok&#8217;da!<\/p>\n","protected":false},"author":2,"featured_media":3337,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-2608","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sunucu"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Sunucu G\u00fcvenli\u011fi Hakk\u0131nda Her \u015eey - daha.net Blog<\/title>\n<meta name=\"description\" content=\"Sunucular\u0131n\u0131z\u0131n g\u00fcvenli\u011fi hakk\u0131nda bilgiler ve sunucu g\u00fcvenli\u011fi \u00f6nlemlerinin ileri okuma notlar\u0131 daha.net Blok&#039;da!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.daha.net\/blog\/sunucu-guvenligi-hakkinda-her-sey\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sunucu G\u00fcvenli\u011fi Hakk\u0131nda Her \u015eey - 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