{"id":125,"date":"2026-02-18T11:13:00","date_gmt":"2026-02-18T11:13:00","guid":{"rendered":"https:\/\/perminet.com\/blog\/?p=125"},"modified":"2026-02-17T18:40:15","modified_gmt":"2026-02-17T18:40:15","slug":"ip-engelleme-tek-basina-yeterli-mi","status":"publish","type":"post","link":"https:\/\/perminet.com\/blog\/ip-engelleme-tek-basina-yeterli-mi\/","title":{"rendered":"IP Engelleme Tek Ba\u015f\u0131na Yeterli mi?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Gece loglara bak\u0131yorsunuz. Ayn\u0131 IP\u2019den y\u00fczlerce ba\u015far\u0131s\u0131z login denemesi.<br>Hemen firewall\u2019a girip IP\u2019yi engelliyorsunuz. Rahatl\u0131yorsunuz.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">10 dakika sonra sald\u0131r\u0131 devam ediyor.<br>Ama IP farkl\u0131.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu d\u00f6ng\u00fcy\u00fc birka\u00e7 kez ya\u015fad\u0131ysan\u0131z \u015funu fark etmi\u015f olmal\u0131s\u0131n\u0131z:<br>IP engelleme refleks bir \u00e7\u00f6z\u00fcmd\u00fcr ama \u00e7o\u011fu zaman kal\u0131c\u0131 de\u011fildir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">10 y\u0131l\u0131 a\u015fk\u0131n s\u00fcredir sistem y\u00f6netimi yap\u0131yorum. Brute force sald\u0131r\u0131lar\u0131ndan application layer DDoS\u2019a kadar bir\u00e7ok olayda ilk tepki hep ayn\u0131 oldu: \u201cIP\u2019yi blokla.\u201d \u00c7o\u011fu zaman i\u015fe yarad\u0131\u2026 k\u0131sa s\u00fcreli\u011fine.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ger\u00e7ek soru \u015fu: <strong>IP engelleme tek ba\u015f\u0131na bir g\u00fcvenlik stratejisi olabilir mi?<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">IP engelleme ne zaman i\u015fe yarar?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u015eunu netle\u015ftirelim. IP engelleme gereksiz de\u011fil.<br>Ama kapsam\u0131 s\u0131n\u0131rl\u0131.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u015eu durumlarda etkili olur:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tekil sald\u0131rgan (manuel deneme)<\/li>\n\n\n\n<li>Sabit IP\u2019den brute force<\/li>\n\n\n\n<li>Belirli \u00fclke bloklama<\/li>\n\n\n\n<li>\u0130\u00e7 a\u011f tehditleri<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u00d6rne\u011fin bir m\u00fc\u015fterimde admin paneline s\u00fcrekli giri\u015f denemesi yap\u0131l\u0131yordu. Loglarda ayn\u0131 IP g\u00f6r\u00fcn\u00fcyordu. IP engellendi, sald\u0131r\u0131 bitti.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ama bu senaryo art\u0131k nadir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c7\u00fcnk\u00fc modern sald\u0131r\u0131lar:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Botnet \u00fczerinden gelir<\/li>\n\n\n\n<li>Proxy zinciri kullan\u0131r<\/li>\n\n\n\n<li>Residential IP\u2019lerden \u00e7\u0131kar<\/li>\n\n\n\n<li>Her istekte IP de\u011fi\u015ftirir<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">IP\u2019yi engellersiniz. Sald\u0131r\u0131 devam eder.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Ger\u00e7ek bir senaryo: 12.000 IP\u2019yi engellemek<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Bir e-ticaret sitesinde ya\u015fad\u0131\u011f\u0131m olay.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Login endpoint\u2019ine yo\u011fun brute force geliyordu. \u0130lk g\u00fcn 300 IP engellendi.<br>\u0130kinci g\u00fcn 2.000.<br>Bir hafta sonunda 12.000 IP firewall blacklist\u2019ine eklenmi\u015fti.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sorun neydi?<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sald\u0131r\u0131 botnet \u00fczerinden geliyordu<\/li>\n\n\n\n<li>Her IP yaln\u0131zca birka\u00e7 deneme yap\u0131yordu<\/li>\n\n\n\n<li>IP\u2019ler residential proxy idi<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">IP blacklist b\u00fcy\u00fcd\u00fc ama sald\u0131r\u0131 bitmedi.<br>\u00dcstelik iptables performans\u0131 d\u00fc\u015fmeye ba\u015flad\u0131.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As\u0131l \u00e7\u00f6z\u00fcm \u015funlar oldu:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Login endpoint\u2019ine rate limit<\/li>\n\n\n\n<li>Fail2ban + threshold d\u00fc\u015f\u00fcrme<\/li>\n\n\n\n<li>WAF ile davran\u0131\u015f analizi<\/li>\n\n\n\n<li>reCAPTCHA entegrasyonu<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">IP engelleme tek ba\u015f\u0131na \u00e7\u00f6z\u00fcm de\u011fildi.<br>Sadece reaksiyondu.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">IP engelleme neden kal\u0131c\u0131 \u00e7\u00f6z\u00fcm de\u011fildir?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c7\u00fcnk\u00fc sald\u0131r\u0131lar\u0131n do\u011fas\u0131 de\u011fi\u015fti.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Eskiden:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sabit sunucular<\/li>\n\n\n\n<li>Tek IP<\/li>\n\n\n\n<li>Basit brute force<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u015eimdi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Botnet a\u011f\u0131<\/li>\n\n\n\n<li>Da\u011f\u0131t\u0131k IP havuzu<\/li>\n\n\n\n<li>IP rotation<\/li>\n\n\n\n<li>Cloud proxy servisleri<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">IP engellemek, akan bir nehirden bir damla suyu durdurmaya benzer.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ayr\u0131ca \u015fu riskleri de vard\u0131r:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Yanl\u0131\u015f IP bloklama (false positive)<\/li>\n\n\n\n<li>CDN arkas\u0131nda ger\u00e7ek kullan\u0131c\u0131y\u0131 engelleme<\/li>\n\n\n\n<li>Payla\u015f\u0131ml\u0131 IP havuzunda masum kullan\u0131c\u0131y\u0131 bloklama<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">IP art\u0131k kimlik de\u011fil.<br>Sadece ge\u00e7ici bir adres.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u00c7o\u011fu ki\u015finin bilmedi\u011fi teknik detay<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Firewall blacklist b\u00fcy\u00fcd\u00fck\u00e7e performans d\u00fc\u015febilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00d6zellikle iptables kullan\u0131yorsan\u0131z ve binlerce kural eklerseniz:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Paket e\u015fle\u015fme s\u00fcresi artar<\/li>\n\n\n\n<li>Kernel seviyesinde lookup maliyeti y\u00fckselir<\/li>\n\n\n\n<li>SYN flood alt\u0131nda CPU t\u00fcketimi artar<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c7\u00fcnk\u00fc iptables kurallar\u0131 s\u0131rayla i\u015fler. Her paket liste boyunca kontrol edilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu y\u00fczden b\u00fcy\u00fck blacklist\u2019ler yerine:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>IP set (ipset) kullanmak<\/li>\n\n\n\n<li>Hash tabanl\u0131 lookup<\/li>\n\n\n\n<li>Edge seviyesinde filtreleme<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">daha verimlidir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IP engelleme y\u00f6nteminin kendisi bile do\u011fru uygulanmazsa performans problemi yaratabilir.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">IP engelleme ile di\u011fer y\u00f6ntemler aras\u0131ndaki fark nedir?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A\u015fa\u011f\u0131daki tablo net bir kar\u015f\u0131la\u015ft\u0131rma sunar:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Y\u00f6ntem<\/th><th>Tekil Sald\u0131r\u0131<\/th><th>Botnet<\/th><th>Brute Force<\/th><th>DDoS<\/th><th>Performans Etkisi<\/th><\/tr><\/thead><tbody><tr><td>IP Engelleme<\/td><td>\u2714<\/td><td>Zay\u0131f<\/td><td>Orta<\/td><td>Zay\u0131f<\/td><td>Artabilir<\/td><\/tr><tr><td>Rate Limiting<\/td><td>\u2714<\/td><td>\u2714<\/td><td>\u2714<\/td><td>Orta<\/td><td>D\u00fc\u015f\u00fck<\/td><\/tr><tr><td>WAF<\/td><td>\u2714<\/td><td>\u2714<\/td><td>\u2714<\/td><td>Orta-Y\u00fcksek<\/td><td>D\u00fc\u015f\u00fck<\/td><\/tr><tr><td>CAPTCHA<\/td><td>\u2716<\/td><td>\u2714<\/td><td>\u2714<\/td><td>\u2716<\/td><td>Yok<\/td><\/tr><tr><td>CDN Edge Filtreleme<\/td><td>\u2714<\/td><td>\u2714<\/td><td>\u2714<\/td><td>\u2714<\/td><td>\u00c7ok D\u00fc\u015f\u00fck<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">IP engelleme reaktif bir y\u00f6ntemdir.<br>Davran\u0131\u015f analizi proaktif bir y\u00f6ntemdir.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">IP engelleme k\u00fc\u00e7\u00fck i\u015fletmeler i\u00e7in yeterli mi?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">K\u00fc\u00e7\u00fck sitelerde ba\u015flang\u0131\u00e7 i\u00e7in i\u015fe yarar.<br>Ama \u015fu durumlarda yetersiz kal\u0131r:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>WordPress brute force<\/li>\n\n\n\n<li>XML-RPC abuse<\/li>\n\n\n\n<li>Application layer DDoS<\/li>\n\n\n\n<li>Bot scraping<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u00d6zellikle dinamik i\u00e7erikli sitelerde, login ve form alanlar\u0131 olan projelerde daha geli\u015fmi\u015f katmanlar gerekir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ayr\u0131ca altyap\u0131 kalitesi de belirleyicidir. \u0130zole kaynak mimarisi ve optimize edilmi\u015f network yap\u0131s\u0131 olmayan ortamlarda, bir m\u00fc\u015fteriye gelen sald\u0131r\u0131 di\u011ferlerini de etkileyebilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu nedenle sadece IP engelleme de\u011fil, do\u011fru yap\u0131land\u0131r\u0131lm\u0131\u015f hosting altyap\u0131s\u0131 da \u00f6nemlidir. \u00d6zellikle performans ve g\u00fcvenlik dengesini sa\u011flayan profesyonel web hosting \u00e7\u00f6z\u00fcmleri, sald\u0131r\u0131 an\u0131nda stabiliteyi korumada ciddi avantaj sa\u011flar. Perminet\u2019in sundu\u011fu altyap\u0131 \u00e7\u00f6z\u00fcmleri bu noktada k\u00fc\u00e7\u00fck ve orta \u00f6l\u00e7ekli projeler i\u00e7in dengeli bir yap\u0131 sunar.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">IP engelleme ne zaman risklidir?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u015eu durumlarda dikkatli olun:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>CDN arkas\u0131nda ger\u00e7ek IP\u2019yi de\u011fil proxy IP\u2019sini bloklamak<\/li>\n\n\n\n<li>Google bot IP aral\u0131\u011f\u0131n\u0131 yanl\u0131\u015fl\u0131kla engellemek<\/li>\n\n\n\n<li>Payment gateway IP\u2019lerini bloklamak<\/li>\n\n\n\n<li>Kurumsal m\u00fc\u015fterinin ofis IP\u2019sini kara listeye almak<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Bir firewall kural\u0131 sadece sald\u0131rgan\u0131 de\u011fil, m\u00fc\u015fteriyi de engelleyebilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IP engelleme karar\u0131 verirken log analizi \u015fartt\u0131r.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Daha do\u011fru yakla\u015f\u0131m nedir?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">IP engelleme tek ba\u015f\u0131na de\u011fil, katmanl\u0131 g\u00fcvenlik stratejisinin par\u00e7as\u0131 olmal\u0131d\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00d6nerdi\u011fim yap\u0131:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Rate limiting<\/li>\n\n\n\n<li>Fail2ban<\/li>\n\n\n\n<li>WAF<\/li>\n\n\n\n<li>Edge filtreleme<\/li>\n\n\n\n<li>Monitoring + alerting<\/li>\n\n\n\n<li>Gerekti\u011finde IP set kullan\u0131m\u0131<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">IP engelleme, zincirin sadece bir halkas\u0131d\u0131r.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">S\u0131k Sorulan Sorular (FAQ)<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">IP engelleme DDoS sald\u0131r\u0131s\u0131n\u0131 durdurur mu?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Genellikle hay\u0131r.<br>DDoS sald\u0131r\u0131lar\u0131 da\u011f\u0131t\u0131k kaynaklardan gelir.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">IP engelleme brute force\u2019u durdurur mu?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tek IP\u2019den geliyorsa evet.<br>Botnet \u00fczerinden geliyorsa yeterli olmaz.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">IP engelleme performans\u0131 etkiler mi?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00fcy\u00fck blacklist listeleri kernel seviyesinde lookup s\u00fcresini art\u0131rabilir.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">IP engelleme SEO\u2019yu etkiler mi?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yanl\u0131\u015f IP bloklama Google bot\u2019u etkilerse evet.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">IP engelleme yerine ne kullanmal\u0131y\u0131m?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Rate limit, WAF, CAPTCHA ve edge filtreleme birlikte kullan\u0131lmal\u0131d\u0131r.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">IP engellemek kolayd\u0131r.<br>Ama g\u00fcvenlik kolay \u00e7\u00f6z\u00fcmlerle sa\u011flanmaz.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ger\u00e7ek koruma, davran\u0131\u015f\u0131 analiz etmek ve katmanl\u0131 mimari kurmakla gelir. IP engelleme ise bu mimarinin sadece k\u00fc\u00e7\u00fck bir par\u00e7as\u0131d\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Gece loglara bak\u0131yorsunuz. Ayn\u0131 IP\u2019den y\u00fczlerce ba\u015far\u0131s\u0131z login denemesi.Hemen firewall\u2019a girip IP\u2019yi engelliyorsunuz. Rahatl\u0131yorsunuz. 10 dakika sonra sald\u0131r\u0131 devam ediyor.Ama IP farkl\u0131. Bu d\u00f6ng\u00fcy\u00fc birka\u00e7 kez ya\u015fad\u0131ysan\u0131z \u015funu fark etmi\u015f&#8230;<\/p>\n","protected":false},"author":2,"featured_media":126,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[16,44,45,33],"class_list":["post-125","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-genel","tag-hosting","tag-ip","tag-ip-engelleme","tag-sunucu"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>IP Engelleme Tek Ba\u015f\u0131na Yeterli mi? - Perminet<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/perminet.com\/blog\/ip-engelleme-tek-basina-yeterli-mi\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"IP Engelleme Tek Ba\u015f\u0131na Yeterli mi? - Perminet\" \/>\n<meta property=\"og:description\" content=\"Gece loglara bak\u0131yorsunuz. Ayn\u0131 IP\u2019den y\u00fczlerce ba\u015far\u0131s\u0131z login denemesi.Hemen firewall\u2019a girip IP\u2019yi engelliyorsunuz. Rahatl\u0131yorsunuz. 10 dakika sonra sald\u0131r\u0131 devam ediyor.Ama IP farkl\u0131. 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