{"id":119,"date":"2016-03-08T12:11:58","date_gmt":"2016-03-08T10:11:58","guid":{"rendered":"https:\/\/demo.limonhost.net\/tr\/makaleler\/?p=119"},"modified":"2021-02-19T16:58:49","modified_gmt":"2021-02-19T13:58:49","slug":"linux-uzerinde-ssh-key-kurulumu","status":"publish","type":"post","link":"https:\/\/www.limonhost.net\/makaleler\/nasil-yaparim\/linux-uzerinde-ssh-key-kurulumu\/","title":{"rendered":"Linux \u00dczerinde SSH Key Kurulumu"},"content":{"rendered":"<p>Linux \u00fczerinde SSH Key kurulumunu anlatmadan \u00f6nce SSH sisteminin ne oldu\u011fundan bahsedelim. SSH (Secure Shell), g\u00fcvenli veri iletimi amac\u0131yla \u015fifrelenmi\u015f bir a\u011f protokol\u00fcd\u00fcr. <!--more--><\/p>\n<p><a href=\"https:\/\/www.limonhost.net\/hosting\"><img decoding=\"async\" class=\"alignnone wp-image-5245\" src=\"https:\/\/www.limonhost.net\/makaleler\/wp-content\/uploads\/2016\/03\/ssh-key-kurulumu.png\" alt=\"ssh key kurulumu\" width=\"600\" height=\"314\" srcset=\"https:\/\/www.limonhost.net\/makaleler\/wp-content\/uploads\/2016\/03\/ssh-key-kurulumu.png 1200w, https:\/\/www.limonhost.net\/makaleler\/wp-content\/uploads\/2016\/03\/ssh-key-kurulumu-300x157.png 300w, https:\/\/www.limonhost.net\/makaleler\/wp-content\/uploads\/2016\/03\/ssh-key-kurulumu-1024x536.png 1024w, https:\/\/www.limonhost.net\/makaleler\/wp-content\/uploads\/2016\/03\/ssh-key-kurulumu-768x402.png 768w, https:\/\/www.limonhost.net\/makaleler\/wp-content\/uploads\/2016\/03\/ssh-key-kurulumu-1000x523.png 1000w, https:\/\/www.limonhost.net\/makaleler\/wp-content\/uploads\/2016\/03\/ssh-key-kurulumu-800x419.png 800w, https:\/\/www.limonhost.net\/makaleler\/wp-content\/uploads\/2016\/03\/ssh-key-kurulumu-600x314.png 600w, https:\/\/www.limonhost.net\/makaleler\/wp-content\/uploads\/2016\/03\/ssh-key-kurulumu-400x209.png 400w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p>SSH ile birbirine ba\u011flanm\u0131\u015f iki bilgisayar aras\u0131ndaki veri aktar\u0131m\u0131 bu \u015fifrelenmi\u015f, g\u00fcvenli a\u011f protokol\u00fc \u00fczerinden yap\u0131l\u0131r. Bu yap\u0131da, &#8220;gizli (private key)&#8221; ve onu tamamlayan &#8220;a\u00e7\u0131k (public)&#8221; olmak \u00fczere iki anahtar bulunur. Kullan\u0131c\u0131 &#8220;gizli&#8221; anahtar\u0131n\u0131 ba\u011flanmak i\u00e7in kullanaca\u011f\u0131 sistemde, &#8220;a\u00e7\u0131k&#8221; anahtar\u0131n\u0131 da ba\u011flanaca\u011f\u0131 sistemde bulundurur. Ba\u011flant\u0131 s\u0131ras\u0131nda bu iki anahtar\u0131n e\u015fle\u015fmesiyle, sisteme giri\u015f yap\u0131lm\u0131\u015f olur. Bu sayede sunucu \u015fifreleri payla\u015f\u0131lmadan, sadece sisteme girmesi gereken kullan\u0131c\u0131lar\u0131n public keyleri eklenerek giri\u015f izni verilebilir. \u00d6nemli faydalar\u0131ndan biri de kullan\u0131c\u0131 ad\u0131\/\u015fifre ad\u0131m\u0131n\u0131 ortadan kald\u0131rmas\u0131 ve otomatik giri\u015f yap\u0131labilmesi sayesinde birden cok sunucuyu y\u00f6netmekteki g\u00fcvenlik sorunlar\u0131n\u0131 azaltmas\u0131d\u0131r. Ayn\u0131 zamanda uzaktan dosya transferi, otomatik yedekleme, scriptlerin \u00e7al\u0131\u015ft\u0131r\u0131lmas\u0131 gibi ad\u0131mlar\u0131 da g\u00fcvenli bir \u015fekilde ger\u00e7ekle\u015ftirmenizi sa\u011flar.<\/p>\n<h2>SSH Servisinin Kurulumu<\/h2>\n<p>Kurulum s\u0131ras\u0131nda SSH servisi eklenmediyse a\u015fa\u011f\u0131daki komut yard\u0131m\u0131yla openSSH kurulur;<\/p>\n<pre class=\" language-bash\"><code class=\" language-bash\"><span class=\"token function\">sudo<\/span> <span class=\"token function\">apt-get<\/span> <span class=\"token function\">install<\/span> openssh-server\r\n<span class=\"token function\">sudo<\/span> <span class=\"token function\">apt-get<\/span> <span class=\"token function\">install<\/span> openssh-client<\/code><\/pre>\n<p>Servis kurulduktan sonra a\u015fa\u011f\u0131daki komutla bir SSH Key \u00e7ifti olu\u015fturulur. Bu anahtarlardan &#8220;a\u00e7\u0131k (public key) olan\u0131 ba\u011flan\u0131lacak servera kaydedilecektir. Public key farkl\u0131 sunuculara ba\u011flanmak i\u00e7in da\u011f\u0131t\u0131labilir. &#8220;Gizli (private key) ise ba\u011flanacak kullan\u0131c\u0131 taraf\u0131ndan saklanmas\u0131 ve public key&#8217; i e\u015fledi\u011fi i\u00e7in payla\u015f\u0131lmamas\u0131 gereken anahtard\u0131r.<\/p>\n<pre class=\" language-bash\"><code class=\" language-bash\">ssh-keygen -t rsa<\/code><\/pre>\n<p>Bu komutu \u00e7al\u0131\u015ft\u0131rd\u0131ktan sonra, sizden Private Key icin bir konum isteyecektir. Bu konumu default haliyle birakmak icin enter&#8217; a bas\u0131p gecebilirsiniz. Daha sonra bir Private Key \u015fifresi ister. Bu a\u015famada dilerseniz \u015fifre kontrol\u00fc olmadan sadece iki anahtar\u0131n e\u015fle\u015fmesi y\u00f6ntemiyle giri\u015f yapabilir, ya da iki anahtar e\u015fle\u015ftikten sonra bir de \u015fifre tan\u0131mlayabilirsiniz. Art\u0131k private ve public anahtarlar\u0131n\u0131z olu\u015fmu\u015f durumda.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cdn.limonhost.net\/panel\/blog\/ssh2.png\" width=\"486\" height=\"308\" \/><\/p>\n<p>Private Key: \/root\/.ssh\/id_rsa dosyas\u0131, Public Key: \/root\/.ssh\/id_rsa.pub dosyas\u0131d\u0131r. Anahtarlar\u0131 olu\u015fturduktan sonra authorized_keys isimli text dosyay\u0131 olu\u015fturup, sunucuya ba\u011flanma yetkisi olan public key&#8217; leri bu text dosyas\u0131n\u0131n i\u00e7ine ataca\u011f\u0131z. Ama \u00f6nce dosyay\u0131 kullan\u0131l\u0131r hale getirmek i\u00e7in sshd_config dosyam\u0131z\u0131 editleyece\u011fiz. Nano edit\u00f6r\u00fcyle a\u00e7\u0131lan sshd_config dosyas\u0131n\u0131n a\u015fa\u011f\u0131daki sat\u0131r\u0131n\u0131n ba\u015f\u0131ndaki # i\u015faretini kald\u0131raca\u011f\u0131z.<\/p>\n<pre class=\" language-bash\"><code class=\" language-bash\"><span class=\"token function\">sudo<\/span> <span class=\"token function\">nano<\/span> \/etc\/ssh\/sshd_config\r\nAuthorizedKeysfile %h\/.ssh\/authorized_keys<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/cdn.limonhost.net\/panel\/blog\/ssh3.png\" alt=\"\" width=\"630\" height=\"243\" \/><\/p>\n<p>Art\u0131k publik key dosyam\u0131z\u0131 kopyalararak authorized_keys dosyas\u0131n\u0131 olu\u015fturabiliriz;<\/p>\n<pre class=\" language-bash\"><code class=\" language-bash\"><span class=\"token function\">cp<\/span> id_rsa-pub authorized_keys<\/code><\/pre>\n<p>Sunucunuzda olu\u015fturdu\u011funuz authorized_keys dosyas\u0131n\u0131n i\u00e7inde &#8220;<strong>ssh-rsa xxxxx&#8221; ile <\/strong>ba\u015flayan sat\u0131r sizin public key&#8217; inizdir. Bu sunucuya ba\u011flanmas\u0131 gereken di\u011fer kullan\u0131c\u0131lar i\u00e7in de ayn\u0131 dosyada alt sat\u0131ra ge\u00e7ip &#8220;ssh-rsa&#8221; ile ba\u015flayarak public keyi kopyalayabilirsiniz. Burada dikkat edilmesi gereken konu public keyin tek sat\u0131r halinde yaz\u0131lmas\u0131 gerekti\u011fidir. Son olarak chmod ile ssh dosya ve klas\u00f6rlerinin yetkileri tan\u0131mlan\u0131r.<\/p>\n<pre class=\" language-bash\"><code class=\" language-bash\"><span class=\"token function\">chmod<\/span> 700 ~\/.ssh\r\n<span class=\"token function\">chmod<\/span> 600 ~\/.ssh\/authorized_keys<\/code><\/pre>\n<p>Art\u0131k sunucunuz Private Key ile \u015fifre sormadan ba\u011flanmaya a\u00e7\u0131lm\u0131\u015ft\u0131r.<\/p>\n<h2>Sunucuyu Sadece SSH ile Eri\u015filebilecek Hale Getirme<\/h2>\n<p>Bu a\u015famadan sonra sunucunuzda password kontrol\u00fcn\u00fc kapatarak, sadece anahtarla giri\u015fi aktif hale getirebilirsiniz. Bunun i\u00e7in SSH konfigurasyon dosyas\u0131nda k\u00fc\u00e7\u00fck bir de\u011fi\u015fiklik yapmak gerekiyor.<\/p>\n<pre class=\" language-bash\"><code class=\" language-bash\"><span class=\"token function\">sudo<\/span> <span class=\"token function\">nano<\/span> \/etc\/ssh\/sshd_config<\/code><\/pre>\n<p>Nano edit\u00f6r\u00fcyle a\u00e7\u0131lan sshd_config dosyas\u0131ndaki a\u015fa\u011f\u0131daki sat\u0131r\u0131n ba\u015f\u0131ndaki # i\u015faretini kald\u0131r\u0131p &#8220;Yes&#8221; olan varsay\u0131lan de\u011feri &#8220;No&#8221; ile de\u011fi\u015ftirece\u011fiz.<\/p>\n<pre class=\" language-ini\"><code class=\" language-ini\">PasswordAuthentication No<\/code><\/pre>\n<p>Bu i\u015flemin ard\u0131ndan sunucunuz sadece ssh key ile giri\u015f yapan uzak kullan\u0131c\u0131lar\u0131 kabul edecektir. Bu sayede<strong>brute force <\/strong>ile root \u015fifresini k\u0131rma giri\u015fimleri de engellenmi\u015f olacakt\u0131r.<\/p>\n<h2>Putty<\/h2>\n<p>Putty, Linux sunucular\u0131m\u0131za uzaktan ba\u011flant\u0131 i\u00e7in kullanabilece\u011fimiz a\u00e7\u0131k kaynakl\u0131 bir ssh\/terminal program\u0131d\u0131r. Bu program sayesinde Private Key ile sunucumuza ba\u011flant\u0131 kurabiliriz.<\/p>\n<p>Bunun i\u00e7in yapmam\u0131z gereken Host Name yerine sunucu ip adresini yazd\u0131ktan sonra, o sunucuda bulunan Public Key&#8217; e kar\u015f\u0131l\u0131k gelen Private Key dosyas\u0131n\u0131 &#8220;Connection &gt; SSH &gt; Auth&#8221; sekmesindeki &#8220;Private key file for authentication&#8221; alan\u0131nda g\u00f6stermek. Bu i\u015flem ad\u0131mlar\u0131ndan sonra sunucunuza Private Keyiniz ile ba\u011flanabileceksiniz.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cdn.limonhost.net\/panel\/blog\/ssh4.png\" alt=\"\" width=\"464\" height=\"446\" \/><\/p>\n<p>Hepsi bu kadar. LimonHost g\u00fcvenli g\u00fcnler diler.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Linux \u00fczerinde SSH Key kurulumunu anlatmadan \u00f6nce SSH sisteminin ne oldu\u011fundan bahsedelim. SSH (Secure Shell), g\u00fcvenli veri iletimi amac\u0131yla \u015fifrelenmi\u015f bir a\u011f protokol\u00fcd\u00fcr.<\/p>\n","protected":false},"author":3,"featured_media":120,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.11 (Yoast SEO v21.8.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Linux \u00dczerinde SSH Key Kurulumu | LimonHost<\/title>\n<meta name=\"description\" content=\"Linux \u00dczerinde SSH Key Kurulumu\" \/>\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.limonhost.net\/makaleler\/nasil-yaparim\/linux-uzerinde-ssh-key-kurulumu\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Linux \u00dczerinde SSH Key Kurulumu\" \/>\n<meta property=\"og:description\" content=\"Linux \u00fczerinde SSH Key kurulumunu anlatmadan \u00f6nce SSH sisteminin ne oldu\u011fundan bahsedelim. SSH (Secure Shell), g\u00fcvenli veri iletimi amac\u0131yla \u015fifrelenmi\u015f bir a\u011f protokol\u00fcd\u00fcr. SSH ile birbirine ba\u011flanm\u0131\u015f iki bilgisayar aras\u0131ndaki veri aktar\u0131m\u0131 bu \u015fifrelenmi\u015f, g\u00fcvenli a\u011f protokol\u00fc \u00fczerinden yap\u0131l\u0131r. Bu yap\u0131da, &quot;gizli (private key)&quot; ve onu tamamlayan &quot;a\u00e7\u0131k (public)&quot; olmak \u00fczere iki anahtar bulunur. Kullan\u0131c\u0131 &quot;gizli&quot; anahtar\u0131n\u0131 ba\u011flanmak i\u00e7in kullanaca\u011f\u0131 sistemde, &quot;a\u00e7\u0131k&quot; anahtar\u0131n\u0131 da ba\u011flanaca\u011f\u0131 sistemde bulundurur. Ba\u011flant\u0131 s\u0131ras\u0131nda bu iki anahtar\u0131n e\u015fle\u015fmesiyle, sisteme giri\u015f yap\u0131lm\u0131\u015f olur. Bu sayede sunucu \u015fifreleri payla\u015f\u0131lmadan, sadece sisteme girmesi gereken kullan\u0131c\u0131lar\u0131n public keyleri eklenerek giri\u015f izni verilebilir. \u00d6nemli faydalar\u0131ndan biri de kullan\u0131c\u0131 ad\u0131\/\u015fifre ad\u0131m\u0131n\u0131 ortadan kald\u0131rmas\u0131 ve otomatik giri\u015f yap\u0131labilmesi sayesinde birden cok sunucuyu y\u00f6netmekteki g\u00fcvenlik sorunlar\u0131n\u0131 azaltmas\u0131d\u0131r. Ayn\u0131 zamanda uzaktan dosya transferi, otomatik yedekleme, scriptlerin \u00e7al\u0131\u015ft\u0131r\u0131lmas\u0131 gibi ad\u0131mlar\u0131 da g\u00fcvenli bir \u015fekilde ger\u00e7ekle\u015ftirmenizi sa\u011flar.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.limonhost.net\/makaleler\/nasil-yaparim\/linux-uzerinde-ssh-key-kurulumu\/\" \/>\n<meta property=\"og:site_name\" content=\"Makaleler | LIMONHOST\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/tr-tr.facebook.com\/limonhosting\/\" \/>\n<meta property=\"article:published_time\" content=\"2016-03-08T10:11:58+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-02-19T13:58:49+00:00\" \/>\n<meta name=\"author\" content=\"Kerem Cebeci\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Linux \u00dczerinde SSH Key Kurulumu\" \/>\n<meta name=\"twitter:description\" content=\"Linux \u00fczerinde SSH Key kurulumunu anlatmadan \u00f6nce SSH sisteminin ne oldu\u011fundan bahsedelim. SSH (Secure Shell), g\u00fcvenli veri iletimi amac\u0131yla \u015fifrelenmi\u015f bir a\u011f protokol\u00fcd\u00fcr. SSH ile birbirine ba\u011flanm\u0131\u015f iki bilgisayar aras\u0131ndaki veri aktar\u0131m\u0131 bu \u015fifrelenmi\u015f, g\u00fcvenli a\u011f protokol\u00fc \u00fczerinden yap\u0131l\u0131r. Bu yap\u0131da, &quot;gizli (private key)&quot; ve onu tamamlayan &quot;a\u00e7\u0131k (public)&quot; olmak \u00fczere iki anahtar bulunur. Kullan\u0131c\u0131 &quot;gizli&quot; anahtar\u0131n\u0131 ba\u011flanmak i\u00e7in kullanaca\u011f\u0131 sistemde, &quot;a\u00e7\u0131k&quot; anahtar\u0131n\u0131 da ba\u011flanaca\u011f\u0131 sistemde bulundurur. Ba\u011flant\u0131 s\u0131ras\u0131nda bu iki anahtar\u0131n e\u015fle\u015fmesiyle, sisteme giri\u015f yap\u0131lm\u0131\u015f olur. Bu sayede sunucu \u015fifreleri payla\u015f\u0131lmadan, sadece sisteme girmesi gereken kullan\u0131c\u0131lar\u0131n public keyleri eklenerek giri\u015f izni verilebilir. \u00d6nemli faydalar\u0131ndan biri de kullan\u0131c\u0131 ad\u0131\/\u015fifre ad\u0131m\u0131n\u0131 ortadan kald\u0131rmas\u0131 ve otomatik giri\u015f yap\u0131labilmesi sayesinde birden cok sunucuyu y\u00f6netmekteki g\u00fcvenlik sorunlar\u0131n\u0131 azaltmas\u0131d\u0131r. Ayn\u0131 zamanda uzaktan dosya transferi, otomatik yedekleme, scriptlerin \u00e7al\u0131\u015ft\u0131r\u0131lmas\u0131 gibi ad\u0131mlar\u0131 da g\u00fcvenli bir \u015fekilde ger\u00e7ekle\u015ftirmenizi sa\u011flar.\" \/>\n<meta name=\"twitter:image\" content=\"https:\/\/demo.limonhost.net\/_tr\/makaleler\/wp-content\/uploads\/2016\/10\/ssh.jpg\" \/>\n<meta name=\"twitter:creator\" content=\"@limonhost\" \/>\n<meta name=\"twitter:site\" content=\"@limonhost\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Kerem Cebeci\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 dakika\" \/>\n<script type=\"application\/ld+json\" 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SSH (Secure Shell), g\u00fcvenli veri iletimi amac\u0131yla \u015fifrelenmi\u015f bir a\u011f protokol\u00fcd\u00fcr. SSH ile birbirine ba\u011flanm\u0131\u015f iki bilgisayar aras\u0131ndaki veri aktar\u0131m\u0131 bu \u015fifrelenmi\u015f, g\u00fcvenli a\u011f protokol\u00fc \u00fczerinden yap\u0131l\u0131r. Bu yap\u0131da, \"gizli (private key)\" ve onu tamamlayan \"a\u00e7\u0131k (public)\" olmak \u00fczere iki anahtar bulunur. Kullan\u0131c\u0131 \"gizli\" anahtar\u0131n\u0131 ba\u011flanmak i\u00e7in kullanaca\u011f\u0131 sistemde, \"a\u00e7\u0131k\" anahtar\u0131n\u0131 da ba\u011flanaca\u011f\u0131 sistemde bulundurur. Ba\u011flant\u0131 s\u0131ras\u0131nda bu iki anahtar\u0131n e\u015fle\u015fmesiyle, sisteme giri\u015f yap\u0131lm\u0131\u015f olur. 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SSH ile birbirine ba\u011flanm\u0131\u015f iki bilgisayar aras\u0131ndaki veri aktar\u0131m\u0131 bu \u015fifrelenmi\u015f, g\u00fcvenli a\u011f protokol\u00fc \u00fczerinden yap\u0131l\u0131r. Bu yap\u0131da, \"gizli (private key)\" ve onu tamamlayan \"a\u00e7\u0131k (public)\" olmak \u00fczere iki anahtar bulunur. Kullan\u0131c\u0131 \"gizli\" anahtar\u0131n\u0131 ba\u011flanmak i\u00e7in kullanaca\u011f\u0131 sistemde, \"a\u00e7\u0131k\" anahtar\u0131n\u0131 da ba\u011flanaca\u011f\u0131 sistemde bulundurur. Ba\u011flant\u0131 s\u0131ras\u0131nda bu iki anahtar\u0131n e\u015fle\u015fmesiyle, sisteme giri\u015f yap\u0131lm\u0131\u015f olur. Bu sayede sunucu \u015fifreleri payla\u015f\u0131lmadan, sadece sisteme girmesi gereken kullan\u0131c\u0131lar\u0131n public keyleri eklenerek giri\u015f izni verilebilir. \u00d6nemli faydalar\u0131ndan biri de kullan\u0131c\u0131 ad\u0131\/\u015fifre ad\u0131m\u0131n\u0131 ortadan kald\u0131rmas\u0131 ve otomatik giri\u015f yap\u0131labilmesi sayesinde birden cok sunucuyu y\u00f6netmekteki g\u00fcvenlik sorunlar\u0131n\u0131 azaltmas\u0131d\u0131r. 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