{"id":22645,"date":"2025-05-30T23:45:14","date_gmt":"2025-05-30T20:45:14","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/yeni-linux-sunucularinizi-zaten-tehdit-altinda-gibi-ele-alin\/"},"modified":"2025-05-30T23:45:14","modified_gmt":"2025-05-30T20:45:14","slug":"yeni-linux-sunucularinizi-zaten-tehdit-altinda-gibi-ele-alin","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/yeni-linux-sunucularinizi-zaten-tehdit-altinda-gibi-ele-alin\/","title":{"rendered":"Yeni Linux Sunucular\u0131n\u0131z\u0131 Zaten Tehdit Alt\u0131nda Gibi Ele Al\u0131n"},"content":{"rendered":"

<\/p>\n

Yeni Linux Sunucular\u0131n\u0131z\u0131 Zaten Tehdit Alt\u0131nda Gibi Ele Al\u0131n<\/p>\n

Siber g\u00fcvenlik d\u00fcnyas\u0131nda, “g\u00fcvenlik” kavram\u0131 s\u00fcrekli evrim ge\u00e7iriyor. Bir\u00e7ok uzman, yeni kurulumlu bir Linux sunucusunun bile g\u00fcvenli olmad\u0131\u011f\u0131n\u0131, zaten potansiyel bir sald\u0131r\u0131ya a\u00e7\u0131k oldu\u011funu savunuyor. Bu yakla\u015f\u0131m, proaktif bir g\u00fcvenlik stratejisi benimsememizi, yani “s\u0131f\u0131r g\u00fcven” yakla\u015f\u0131m\u0131n\u0131 savunuyor. Ben de, bu d\u00fc\u015f\u00fcnce bi\u00e7imini benimseyenlerdenim ve bu makalede, neden her yeni Linux sunucusunu zaten tehdit alt\u0131nda gibi ele ald\u0131\u011f\u0131m\u0131 ve sizlerin de bunu neden yapman\u0131z gerekti\u011fini a\u00e7\u0131klayaca\u011f\u0131m.<\/p>\n

\u00d6ncelikle, bir\u00e7ok g\u00fcvenlik a\u00e7\u0131\u011f\u0131, kurulum a\u015famas\u0131nda veya daha sonras\u0131nda, bilinmeyen yollarla sisteme girebiliyor. \u00d6rne\u011fin, yaz\u0131l\u0131m paketlerindeki gizli k\u00f6t\u00fc ama\u00e7l\u0131 kodlar veya zay\u0131f parolalar, sald\u0131rganlar i\u00e7in a\u00e7\u0131k bir kap\u0131 g\u00f6revi g\u00f6rebilir. Bunun yan\u0131nda, insan hatas\u0131 da g\u00f6z ard\u0131 edilemez. Yanl\u0131\u015f konfig\u00fcrasyonlar, sald\u0131rganlar i\u00e7in istismar edilebilecek f\u0131rsatlar sunar.<\/p>\n

\u0130\u015fte bu y\u00fczden, ben her yeni Linux sunucusunu kurarken, \u00f6ncelikle g\u00fcvenli\u011fi en \u00fcst d\u00fczeye \u00e7\u0131karmaya odaklan\u0131yorum. Bu, sadece temel g\u00fcvenlik duvar\u0131 ve antivir\u00fcs kurulumundan \u00e7ok daha fazlas\u0131n\u0131 i\u00e7eriyor. \u00d6rne\u011fin, SSH eri\u015fimini k\u0131s\u0131tlamak, g\u00fc\u00e7l\u00fc ve benzersiz parolalar kullanmak, d\u00fczenli g\u00fcvenlik g\u00fcncellemeleri yapmak ve sald\u0131r\u0131 tespiti sistemleri kurmak gibi ad\u0131mlar\u0131 at\u0131yorum. Ayr\u0131ca, \u015f\u00fcpheli aktiviteleri izlemek i\u00e7in loglar\u0131 d\u00fczenli olarak inceliyorum.<\/p>\n

Bu yakla\u015f\u0131m\u0131n bir di\u011fer \u00f6nemli unsuru da, minimum ayr\u0131cal\u0131k prensibini uygulamak. Sistemdeki her kullan\u0131c\u0131 ve i\u015flem, yapt\u0131\u011f\u0131 i\u015f i\u00e7in gerekli olan en d\u00fc\u015f\u00fck seviyede yetkiye sahip olmal\u0131d\u0131r. Bu, bir sald\u0131rgan\u0131n sistemde yay\u0131lmas\u0131n\u0131 engellemeye yard\u0131mc\u0131 olur.<\/p>\n

G\u00fcvenli\u011fin s\u00fcrekli bir s\u00fcre\u00e7 oldu\u011funu unutmamak gerekiyor. Tek bir g\u00fcvenlik duvar\u0131 veya antivir\u00fcs program\u0131 yeterli de\u011fildir. \u00c7ok katmanl\u0131 bir g\u00fcvenlik yakla\u015f\u0131m\u0131 benimseyerek, olas\u0131 tehditleri en aza indirebiliriz. Bu, d\u00fczenli g\u00fcvenlik denetimleri yapmak, g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 d\u00fczenli olarak taramak ve yeni tehditlere kar\u015f\u0131 s\u00fcrekli g\u00fcncel kalmay\u0131 i\u00e7erir.<\/p>\n

Sonu\u00e7 olarak, her yeni Linux sunucusunu tehdit alt\u0131nda farz etmek, proaktif ve etkili bir g\u00fcvenlik stratejisi i\u00e7in gereklidir. Bu yakla\u015f\u0131m, olabilecek zarar\u0131 minimize eder ve sisteminizin g\u00fcvenli\u011fini g\u00fc\u00e7lendirir. Daha detayl\u0131 bilgi i\u00e7in web sitemi<\/a> ziyaret edebilirsiniz.<\/p>\n

\n# G\u00fcvenlik duvar\u0131 kurulumu (firewalld \u00f6rne\u011fi)\nsudo firewall-cmd --permanent --add-service=ssh\nsudo firewall-cmd --reload\n\n# SSH eri\u015fimini k\u0131s\u0131tlama\n# \/etc\/ssh\/sshd_config dosyas\u0131n\u0131 d\u00fczenleyin ve AllowUsers veya DenyUsers direktiflerini kullan\u0131n\n\n# G\u00fc\u00e7l\u00fc parola politikalar\u0131\n# \/etc\/login.defs dosyas\u0131n\u0131 d\u00fczenleyin ve PASS_MAX_DAYS, PASS_MIN_DAYS, PASS_MIN_LEN gibi parametreleri ayarlay\u0131n\n<\/code><\/pre>\n
Umar\u0131m bu makale,  yeni Linux sunucular\u0131n\u0131z\u0131 g\u00fcvenli hale getirmenizde size yard\u0131mc\u0131 olur.  Unutmay\u0131n,  g\u00fcvenlik her zaman \u00f6ncelikli olmal\u0131d\u0131r.<\/p>\n
#Etiketler: Linux g\u00fcvenli\u011fi, sunucu g\u00fcvenli\u011fi, siber g\u00fcvenlik, g\u00fcvenlik a\u00e7\u0131klar\u0131, g\u00fcvenlik \u00f6nlemleri, tehdit modeli, sald\u0131r\u0131 \u00f6nleme, s\u0131f\u0131r g\u00fcven, minimum ayr\u0131cal\u0131k prensibi, SSH g\u00fcvenli\u011fi, parola g\u00fcvenli\u011fi, g\u00fcvenlik duvar\u0131, log y\u00f6netimi<\/p>\n
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Ben de, bu d\u00fc\u015f\u00fcnce bi\u00e7imini benimseyenlerdenim ve bu makalede, neden her yeni Linux sunucusunu zaten tehdit alt\u0131nda gibi ele ald\u0131\u011f\u0131m\u0131 ve sizlerin de bunu neden yapman\u0131z gerekti\u011fini a\u00e7\u0131klayaca\u011f\u0131m.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/yeni-linux-sunucularinizi-zaten-tehdit-altinda-gibi-ele-alin\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Yeni Linux Sunucular\u0131n\u0131z\u0131 Zaten Tehdit Alt\u0131nda Gibi Ele Al\u0131n\" \/>\n<meta property=\"og:description\" content=\"Siber g\u00fcvenlik d\u00fcnyas\u0131nda, "g\u00fcvenlik" kavram\u0131 s\u00fcrekli evrim ge\u00e7iriyor. 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Ben de, bu d\u00fc\u015f\u00fcnce bi\u00e7imini benimseyenlerdenim ve bu makalede, neden her yeni Linux sunucusunu zaten tehdit alt\u0131nda gibi ele ald\u0131\u011f\u0131m\u0131 ve sizlerin de bunu neden yapman\u0131z gerekti\u011fini a\u00e7\u0131klayaca\u011f\u0131m.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/yeni-linux-sunucularinizi-zaten-tehdit-altinda-gibi-ele-alin\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-05-30T20:45:14+00:00\" \/>\n<meta name=\"author\" content=\"Fatih Soysal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fatih Soysal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/yeni-linux-sunucularinizi-zaten-tehdit-altinda-gibi-ele-alin\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/yeni-linux-sunucularinizi-zaten-tehdit-altinda-gibi-ele-alin\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"Yeni Linux Sunucular\u0131n\u0131z\u0131 Zaten Tehdit Alt\u0131nda Gibi Ele Al\u0131n\",\"datePublished\":\"2025-05-30T20:45:14+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/yeni-linux-sunucularinizi-zaten-tehdit-altinda-gibi-ele-alin\/\"},\"wordCount\":502,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/yeni-linux-sunucularinizi-zaten-tehdit-altinda-gibi-ele-alin\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/yeni-linux-sunucularinizi-zaten-tehdit-altinda-gibi-ele-alin\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/yeni-linux-sunucularinizi-zaten-tehdit-altinda-gibi-ele-alin\/\",\"name\":\"Yeni Linux Sunucular\u0131n\u0131z\u0131 Zaten Tehdit Alt\u0131nda Gibi Ele Al\u0131n\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-05-30T20:45:14+00:00\",\"description\":\"Siber g\u00fcvenlik d\u00fcnyas\u0131nda, \\\"g\u00fcvenlik\\\" kavram\u0131 s\u00fcrekli evrim ge\u00e7iriyor. 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