{"id":874,"date":"2017-07-01T09:02:52","date_gmt":"2017-07-01T09:02:52","guid":{"rendered":"https:\/\/www.ozankabuk.com.tr\/?p=132"},"modified":"2022-09-30T21:15:17","modified_gmt":"2022-09-30T21:15:17","slug":"linux-ssh-port-degistirme","status":"publish","type":"post","link":"https:\/\/www.melibera.com\/blog\/linux-ssh-port-degistirme.html","title":{"rendered":"Linux SSH Port De\u011fi\u015ftirme"},"content":{"rendered":"<p>Merhaba,<\/p>\n<p>Linux sunucularda hacklenme sorunsal\u0131 devaml\u0131 olarak g\u00f6r\u00fclen olaylardand\u0131r. Ya\u015fanan hack olaylar\u0131n\u0131n \u00e7e\u015fitli sebepleri bulunmaktad\u0131r. Bu sebeplerden en yayg\u0131n olarak bilineni ise Sunucu root \u015fifresinin ele ge\u00e7irilmesidir. Ele ge\u00e7irilen \u015fifre ile sunucu \u00fczerinde tam yetkiye sahibi olunur ve sunucu \u00fczerinden istenildi\u011fi gibi i\u015flem yap\u0131labilmektedir. Bunun en yayg\u0131n olarak kullan\u0131lmas\u0131 ise web sitelerine shell yerle\u015ftirilmesi ve spam mail \u00e7\u0131k\u0131\u015flar\u0131d\u0131r.<\/p>\n<p>Bu yaz\u0131m\u0131zda sizlere <a href=\"https:\/\/www.melibera.com\/kategori\/vds-sunucu\">linux sunucular<\/a> i\u00e7in bir g\u00fcvenlik \u00f6nlemi sa\u011flayaca\u011f\u0131z. Linux sunucularda \u015fifre denemeleri otomatik olarak yap\u0131l\u0131r. Hackerlar kullanm\u0131\u015f olduklar\u0131 yaz\u0131l\u0131mlarla tespit ettikleri \u0130P adreslerine s\u00fcrekli olarak \u015fifre denemesi yaparlar. Bu \u015fifre denemeleri ile sunucunuzun root \u015fifresini \u00e7\u00f6zmeye \u00e7al\u0131\u015f\u0131rlar. Sizin kullanm\u0131\u015f oldu\u011funuz root \u015fifresi basit bir \u015fifre ise \u00e7ok basit bir \u015fekilde sunucunuzu ele ge\u00e7irebilirler. Zor bir \u015fifre ise s\u00fcrekli \u015fifre denemeleri yapacaklard\u0131r.<\/p>\n<p>Hem \u015fifre denemelerinin \u00f6n\u00fcne ge\u00e7mek hemde sunucu g\u00fcvenli\u011finizi sa\u011flamak i\u00e7in yapman\u0131z gereken ilk ad\u0131m SSH portunu de\u011fi\u015ftirmek olmal\u0131d\u0131r. SSH Portlar\u0131 standart olarak 22 gelmektedir. Yap\u0131lan \u015fifre ataklar\u0131da 22 portu \u00fczerinden gelmektedir. Bu nedenle SSH portunuzu muhakkak de\u011fi\u015ftirmeniz gerekmektedir.<\/p>\n<p><strong>Peki SSH portu nas\u0131l de\u011fi\u015ftirilir?\u00a0<\/strong><\/p>\n<p>Sunucumuza SSH giri\u015fi yapt\u0131ktan sonra a\u015fa\u011f\u0131da yer alan komutu giriyoruz ve config dosyam\u0131za ula\u015fm\u0131\u015f oluyoruz.<\/p>\n<pre class=\"\">nano \/etc\/ssh\/sshd_config<\/pre>\n<p>Config dosyam\u0131za ula\u015ft\u0131ktan sonra\u00a0#Port 22 sat\u0131r\u0131n\u0131 buluyoruz ve ba\u015f\u0131nda yer alan &#8220;#&#8221; karakterini kald\u0131r\u0131yoruz ve 22 yerine sunucumuzda kullanamk istedi\u011finiz portu yaz\u0131yoruz.<\/p>\n<figure id=\"attachment_134\" aria-describedby=\"caption-attachment-134\" style=\"width: 893px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-134 size-full\" src=\"https:\/\/www.melibera.com\/blog\/wp-content\/uploads\/ssh-port-de\u011fi\u015ftirme.jpg\" alt=\"\" width=\"903\" height=\"505\" \/><figcaption id=\"caption-attachment-134\" class=\"wp-caption-text\">SSH Portu De\u011fi\u015ftirme<\/figcaption><\/figure>\n<p>Evet \u015fuanda SSH portumuzu de\u011fi\u015ftirdik ancak bu i\u015flem yeterli olmayacakt\u0131r ve yeni portumuzu firewall \u00fczerinde tan\u0131mlamam\u0131z gerekmetkedir. Bu i\u015flemide a\u015fa\u011f\u0131da yer alan komut ile yap\u0131yoruz. (Port numaras\u0131 yazan yere belirledi\u011finiz port numaras\u0131n\u0131 yaz\u0131n\u0131z.)<\/p>\n<pre class=\"\">iptables -A INPUT -p tcp \u2013dport &lt;PORTNUMARASI&gt; -j ACCEPT<\/pre>\n<p>Evet \u015fuanda neredeyse haz\u0131r\u0131z. Son olarak SSH servisini restart ediyoruz ve art\u0131k yeni portumuz tamamen aktif. Bir onraki ba\u011flant\u0131n\u0131zda yeni SSH portunuzu kullanman\u0131z gerekmektedir.<\/p>\n<pre class=\"\">\/etc\/init.d\/sshd restart<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Merhaba, Linux sunucularda hacklenme sorunsal\u0131 devaml\u0131 olarak g\u00f6r\u00fclen olaylardand\u0131r. Ya\u015fanan hack olaylar\u0131n\u0131n \u00e7e\u015fitli sebepleri bulunmaktad\u0131r. Bu sebeplerden en yayg\u0131n olarak &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Linux SSH Port De\u011fi\u015ftirme\" class=\"read-more button\" href=\"https:\/\/www.melibera.com\/blog\/linux-ssh-port-degistirme.html#more-874\" aria-label=\"More on Linux SSH Port De\u011fi\u015ftirme\">Devam\u0131\u0131n\u0131 Oku<\/a><\/p>\n","protected":false},"author":1,"featured_media":829,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[67],"tags":[194,195,201],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.melibera.com\/blog\/wp-json\/wp\/v2\/posts\/874"}],"collection":[{"href":"https:\/\/www.melibera.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.melibera.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.melibera.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.melibera.com\/blog\/wp-json\/wp\/v2\/comments?post=874"}],"version-history":[{"count":1,"href":"https:\/\/www.melibera.com\/blog\/wp-json\/wp\/v2\/posts\/874\/revisions"}],"predecessor-version":[{"id":1806,"href":"https:\/\/www.melibera.com\/blog\/wp-json\/wp\/v2\/posts\/874\/revisions\/1806"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.melibera.com\/blog\/wp-json\/wp\/v2\/media\/829"}],"wp:attachment":[{"href":"https:\/\/www.melibera.com\/blog\/wp-json\/wp\/v2\/media?parent=874"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.melibera.com\/blog\/wp-json\/wp\/v2\/categories?post=874"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.melibera.com\/blog\/wp-json\/wp\/v2\/tags?post=874"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}