{"id":3057,"date":"2026-02-26T22:30:12","date_gmt":"2026-02-26T22:30:12","guid":{"rendered":"https:\/\/renewasoft.com.tr\/?p=3057"},"modified":"2026-02-28T00:35:45","modified_gmt":"2026-02-28T00:35:45","slug":"ot-it-ag-segmentasyonu-ve-mikro-segmentasyon-enerji-sirketleri-icin-guvenli-mimari-tasarimi","status":"publish","type":"post","link":"https:\/\/renewasoft.com.tr\/index.php\/tr\/2026\/02\/26\/ot-it-ag-segmentasyonu-ve-mikro-segmentasyon-enerji-sirketleri-icin-guvenli-mimari-tasarimi\/","title":{"rendered":"OT\/IT A\u011f Segmentasyonu ve Mikro Segmentasyon Enerji \u015eirketleri \u0130\u00e7in G\u00fcvenli Mimari Tasar\u0131m\u0131"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row][vc_column][vc_column_text css=&#8221;&#8221;]<\/p>\n<h1>OT\/IT Ag Segmentasyonu ve Mikro Segmentasyon<\/h1>\n<p><em>HES&#8217;lerde Guvenli SCADA Mimarisi: Purdue Modeli, IEC 62443 ve Zero Trust<\/em><br \/>\n<strong>Renewasoft | 2026<\/strong><\/p>\n<p><span class=\"level-badge\">Seviye: Ileri<\/span>\u00a0\u00a0 Hedef Kitle: SCADA Muhendisi, HES Isletmecisi, CTO, Altyapi Yatirimcisi<\/p>\n<h1 data-start=\"71\" data-end=\"117\"><strong data-start=\"71\" data-end=\"117\">Giri\u015f: Dijital D\u00f6n\u00fc\u015f\u00fcm\u00fcn G\u00fcvenlik \u00d6nko\u015fulu<\/strong><\/h1>\n<p data-start=\"119\" data-end=\"552\">HES operasyonlar\u0131nda verimlilik hedefleri; ger\u00e7ek zamanl\u0131 izleme, uzaktan eri\u015fim, merkezi raporlama ve AI tabanl\u0131 kestirimci analiti\u011fi h\u0131zla standart operasyon haline getiriyor. Hydrowise&#8217;in SCADA ve IoT sens\u00f6rlerinden ger\u00e7ek zamanl\u0131 veri toplay\u0131p santral performans\u0131n\u0131 izleyen; \u00fcretim ve su ak\u0131\u015f\u0131 tahmini ile erken uyar\u0131\/predictive maintenance \u00e7\u0131kt\u0131lar\u0131 \u00fcreten bir platform olarak konumlanmas\u0131, bu d\u00f6n\u00fc\u015f\u00fcm\u00fcn pratik bir \u00f6rne\u011fi[13].<\/p>\n<p data-start=\"554\" data-end=\"859\">Ancak bu dijitalle\u015fme, \u00e7o\u011fu sahada ayn\u0131 soruyu b\u00fcy\u00fct\u00fcyor: Veriyi g\u00fcvenli bi\u00e7imde d\u0131\u015far\u0131 \u00e7\u0131kar\u0131rken kontrol katmanlar\u0131n\u0131 nas\u0131l koruyaca\u011f\u0131z? NIST SP 800-82r3, OT sistemlerinin performans, g\u00fcvenilirlik ve emniyet gereksinimleri nedeniyle g\u00fcvenlik \u00f6nlemlerinin dikkatle tasarlanmas\u0131 gerekti\u011fini vurgular[1].<\/p>\n<p data-start=\"861\" data-end=\"1268\">Bu noktada OT\/IT a\u011f segmentasyonu ve mikro segmentasyon, yaln\u0131zca uyumluluk maddesi de\u011fil; HES&#8217;lerde dijital enerji y\u00f6netiminin g\u00fcvenli \u00e7al\u0131\u015fabilmesi i\u00e7in mimari bir \u00f6nko\u015ful haline geliyor. Segmentasyon; sald\u0131rgan\u0131n IT&#8217;den OT&#8217;ye s\u0131\u00e7rama kapasitesini s\u0131n\u0131rlar, kritik kontrol yollar\u0131n\u0131 en az ayr\u0131cal\u0131k ile daralt\u0131r ve Hydrowise gibi platformlara veri ak\u0131\u015f\u0131n\u0131 kontroll\u00fc bir conduit \u00fczerinden tan\u0131mlar[1][2].<\/p>\n<p data-start=\"1270\" data-end=\"1324\">\u25ba\u00a0<a class=\"decorated-link\" href=\"https:\/\/renewasoft.com.tr\/index.php\/tr\/hizmetimiz\/\" target=\"_new\" rel=\"noopener\" data-start=\"1272\" data-end=\"1322\">https:\/\/renewasoft.com.tr\/index.php\/tr\/hizmetimiz\/<\/a><\/p>\n<h1 data-start=\"1326\" data-end=\"2102\"><b><strong data-start=\"1326\" data-end=\"1353\">TL;DR &#8212; Y\u00f6netici \u00d6zeti<\/strong><\/b><\/h1>\n<p data-start=\"1326\" data-end=\"2102\"><br data-start=\"1353\" data-end=\"1356\" \/>OT\/IT ayr\u0131m\u0131; gecikme, determinism ve safety gereksinimleri nedeniyle IT g\u00fcvenlik pratiklerinin OT&#8217;ye kopyalanamayaca\u011f\u0131 bir mimari ger\u00e7ektir[1].<br data-start=\"1500\" data-end=\"1503\" \/>D\u00fcz a\u011flar IT&#8217;den OT&#8217;ye yatay hareketi kolayla\u015ft\u0131r\u0131r; dual-homed sistemler, zay\u0131f kimlik do\u011frulama ve a\u00e7\u0131k uzaktan eri\u015fim kanallar\u0131 pivot noktas\u0131 olur[5][6].<br data-start=\"1659\" data-end=\"1662\" \/>Purdue modeli + DMZ yakla\u015f\u0131m\u0131; OT ile kurumsal a\u011f aras\u0131nda zorunlu enforcement boundary kurarak veri ak\u0131\u015flar\u0131n\u0131 denetlenebilir hale getirir[1].<br data-start=\"1805\" data-end=\"1808\" \/>Zero Trust mimarisinde mikro segmentasyon; PEP \u00fczerinden asla g\u00fcvenme, her zaman do\u011frula prensibini pratikte uygular[2].<br data-start=\"1928\" data-end=\"1931\" \/>Hydrowise entegrasyonunu g\u00fcvenli k\u0131lman\u0131n yolu; OT veri toplama katman\u0131n\u0131 DMZ\/jump server\/mikro segmentasyon ile izole edip yaln\u0131zca izinli veri ak\u0131\u015flar\u0131n\u0131 a\u00e7makt\u0131r[13].<\/p>\n<h1>Paradigma De\u011fi\u015fimi: Purdue Modeli I\u015f\u0131\u011f\u0131nda IT\/OT Ayr\u0131m\u0131<\/h1>\n<p>OT sistemleri fiziksel s\u00fcre\u00e7leri izler ve kontrol eder; guvenlik tasar\u0131m\u0131 CIA \u00fc\u00e7l\u00fcs\u00fc kadar emniyet ve s\u00fcreklilik hedefleriyle birlikte ele al\u0131nmal\u0131d\u0131r. NIST SP 800-82r3, OT&#8217;nin benzersiz performans, g\u00fcvenilirlik ve safety gereksinimleri nedeniyle g\u00fcvenlik \u00f6nlemlerinin OT&#8217;ye uygun uyarlanmas\u0131n\u0131 temel \u00e7er\u00e7eve olarak tan\u0131mlar<sup>[1]<\/sup>.<\/p>\n<table>\n<tbody>\n<tr>\n<th>Kriter<\/th>\n<th>IT A\u011f\u0131<\/th>\n<th>OT A\u011f\u0131<\/th>\n<\/tr>\n<tr>\n<td><strong>Trafik Deseni<\/strong><\/td>\n<td>De\u011fi\u015fken, kullan\u0131c\u0131 kaynakl\u0131<\/td>\n<td>Deterministik, tekrarlanabilir, \u00f6ng\u00f6r\u00fclebilir<\/td>\n<\/tr>\n<tr>\n<td><strong>Gecikme Toleransi<\/strong><\/td>\n<td>Saniye-dakika kabul edilebilir<\/td>\n<td>ms seviyesi jitter proses stabilitesini etkiler<\/td>\n<\/tr>\n<tr>\n<td><strong>Yasam Dongusu<\/strong><\/td>\n<td>3-5 yil, duzenli guncelleme<\/td>\n<td>15-25 yil, legacy cihazlar yaygin<\/td>\n<\/tr>\n<tr>\n<td><strong>Oncelik Sirasi<\/strong><\/td>\n<td>Gizlilik \u2192 B\u00fct\u00fcnl\u00fck \u2192 Eriiebilirlik<\/td>\n<td>Eri\u015febilirlik \u2192 Emniyet \u2192 B\u00fct\u00fcnl\u00fck<\/td>\n<\/tr>\n<tr>\n<td><strong>Anomali Tespiti<\/strong><\/td>\n<td>Zor: y\u00fcksek varyans<\/td>\n<td>F\u0131rsat: deterministik baselining<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"caption\"><em>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Tablo 1: IT ve OT A\u011f Karakteristiklerinin Kar\u015f\u0131la\u015ft\u0131rmas\u0131 [1]<\/em><\/p>\n<p>Bu d\u00f6n\u00fc\u015f\u00fcm\u00fcn zorlu taraf\u0131, HES&#8217;lerde verinin art\u0131k yaln\u0131zca kontrol odas\u0131nda kalmamas\u0131d\u0131r. Hydrowise gibi platformlar OT&#8217;den IT\/Cloud&#8217;a veri ak\u0131\u015f ihtiyac\u0131n\u0131 art\u0131r\u0131r[13]. Modern tehdit manzaras\u0131 ise OT\/IT s\u0131n\u0131r\u0131n\u0131n tek bir firewall ile y\u00f6netilemeyece\u011fini g\u00f6sterdi. 2015 Ukrayna sald\u0131r\u0131s\u0131nda sald\u0131rganlar kurumsal a\u011fdan OT&#8217;ye uzanan VPN yollar\u0131n\u0131 kulland\u0131; 2FA eksikli\u011fi riski b\u00fcy\u00fctt\u00fc ve HMI \u00fczerinden breaker operasyonlar\u0131na gidildi[5].<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3247\" src=\"https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-1-purdue-iec62443-zones.png\" alt=\"\" width=\"1400\" height=\"900\" srcset=\"https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-1-purdue-iec62443-zones.png 1400w, https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-1-purdue-iec62443-zones-300x193.png 300w, https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-1-purdue-iec62443-zones-1024x658.png 1024w, https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-1-purdue-iec62443-zones-768x494.png 768w, https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-1-purdue-iec62443-zones-350x225.png 350w, https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-1-purdue-iec62443-zones-540x347.png 540w, https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-1-purdue-iec62443-zones-778x500.png 778w, https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-1-purdue-iec62443-zones-622x400.png 622w, https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-1-purdue-iec62443-zones-600x386.png 600w\" sizes=\"auto, (max-width: 1400px) 100vw, 1400px\" \/><\/p>\n<p class=\"caption\" style=\"text-align: center\"><em>\u0130nfografik: Purdue Modeli + IEC 62443 G\u00fcvenlik B\u00f6lgeleri ve \u0130leti\u015fim Kanallar\u0131 [1][9]<\/em><\/p>\n<h2>IEC 62443: G\u00fcvenlik B\u00f6lgeleri ve \u0130leti\u015eim Kanallar\u0131<\/h2>\n<p>IEC 62443 yakla\u015f\u0131m\u0131, a\u011f\u0131 g\u00fcvenlik b\u00f6lgeleri (zones) ve ileti\u015fim kanallar\u0131 (conduits) olarak d\u00fc\u015f\u00fcn\u00fcr. ENISA, zoning\/conduit yakla\u015f\u0131m\u0131n\u0131 tehdit akt\u00f6r profillerine g\u00f6re g\u00fcvenlik seviyelerinin t\u00fcretilebilmesi \u00e7er\u00e7evesinde ele al\u0131r[9].<\/p>\n<h1>Sald\u0131r\u0131 Y\u00fczeyi Haritalama: HES&#8217;lerdeki Zay\u0131f Noktalar<\/h1>\n<p data-start=\"78\" data-end=\"218\">A\u011f segmentasyonunu do\u011fru tasarlamak i\u00e7in \u00f6nce \u201cnereden sald\u0131r\u0131l\u0131r?\u201d sorusunu HES\u2019e \u00f6zel bir sald\u0131r\u0131 y\u00fczeyi haritas\u0131na \u00e7evirmek gerekir[1].<\/p>\n<p data-start=\"220\" data-end=\"262\">\u26a0 Teknik Not: HES\u2019lerde K\u0131r\u0131lgan Alanlar<\/p>\n<p data-start=\"264\" data-end=\"483\"><strong data-start=\"264\" data-end=\"293\">Uzaktan Eri\u015fim (VPN\/RDP):<\/strong> Ukrayna raporu, sald\u0131rgan\u0131n VPN ba\u011flant\u0131lar\u0131n\u0131 ke\u015ffedip kulland\u0131\u011f\u0131n\u0131; 2FA eksikli\u011finin risk yaratt\u0131\u011f\u0131n\u0131 ve remote access DMZ\/jump host\/split tunneling kapatma tedbirlerini \u00f6ne \u00e7\u0131kar\u0131r[5].<\/p>\n<p data-start=\"485\" data-end=\"666\"><strong data-start=\"485\" data-end=\"510\">Dual-homed Sistemler:<\/strong> ICS taktik \u00e7er\u00e7evesi, sald\u0131rganlar\u0131n varsay\u0131lan \u015fifreler ve dual-homed cihazlarla yatay hareket etti\u011fini a\u00e7\u0131klar. D\u00fcz a\u011flarda segment bariyeri yoktur[6].<\/p>\n<p data-start=\"668\" data-end=\"859\"><strong data-start=\"668\" data-end=\"697\">M\u00fchendislik \u0130stasyonlar\u0131:<\/strong> PLC\/RTU programlar\u0131, governor setpoint\u2019leri genellikle EWS\u2019den y\u00f6netilir. Hem OT\u2019ye yak\u0131n hem USB\/vendor yaz\u0131l\u0131m gerektiren y\u00fcksek \u00f6ncelikli sald\u0131r\u0131 y\u00fczeyi[1].<\/p>\n<p data-start=\"861\" data-end=\"1034\"><strong data-start=\"861\" data-end=\"884\">Legacy Protokoller:<\/strong> OT protokollerinin bir b\u00f6l\u00fcm\u00fc g\u00fcvenlik tasar\u0131m\u0131yla do\u011fmad\u0131. NIST, OT firewall\u2019lar\u0131n DNP3\/CIP\/Modbus parser\u2019lar\u0131 ile DPI yapabildi\u011fini belirtir[10].<\/p>\n<p data-start=\"1036\" data-end=\"1202\"><strong data-start=\"1036\" data-end=\"1068\">Bowman Baraj\u0131 \u0130hlali (2013):<\/strong> ABD\u2019de Bowman Baraj\u0131 SCADA\u2019ya yetkisiz eri\u015fim; su seviyesi, s\u0131cakl\u0131k ve savak kap\u0131 bilgilerine ula\u015f\u0131ld\u0131. \u0130yile\u015ftirme: $30.000+[12].<\/p>\n<h1>Savunma Katmanlar\u0131 ve Zero Trust<\/h1>\n<h2>Katmanl\u0131 Savunma: VLAN \/ Firewall \/ DMZ \/ Jump Server \/ Data Diode<\/h2>\n<table>\n<tbody>\n<tr>\n<th>Katman<\/th>\n<th>Teknik \u0130\u015flev<\/th>\n<th>HES Uygulamas\u0131<\/th>\n<\/tr>\n<tr>\n<td><strong>DMZ<\/strong><\/td>\n<td>Kurumsal a\u011fdan OT&#8217;ye direkt eri\u015fimleri engeller; servisleri tek noktada toplar [1]<\/td>\n<td>Hydrowise OT gateway, log broker, time sync proxy DMZ&#8217;de konumlan\u0131r<\/td>\n<\/tr>\n<tr>\n<td><strong>Jump Server<\/strong><\/td>\n<td>OT eri\u015fimini tek denetimli s\u0131\u00e7rama noktas\u0131 \u00fczerinden ge\u00e7tirir [5]<\/td>\n<td>MFA + time-based + session kayd\u0131; split tunneling kapal\u0131<\/td>\n<\/tr>\n<tr>\n<td><strong>Firewall (DPI)<\/strong><\/td>\n<td>deny-all \/ permit-by-exception; stateful + DPI [10]<\/td>\n<td>OT NGFW: Modbus FC, DNP3, OPC UA parser ile komut bazl\u0131 filtreleme<\/td>\n<\/tr>\n<tr>\n<td><strong>Data Diode<\/strong><\/td>\n<td>OT\u2192DMZ tek y\u00f6nl\u00fc veri ak\u0131\u015f\u0131; C2 kanal\u0131n\u0131 fiziksel olarak imk\u00e2ns\u0131z k\u0131lar [1]<\/td>\n<td>Kritik telemetri d\u0131\u015f\u0131nda t\u00fcm ters ak\u0131\u015f fiziksel olarak engellenir<\/td>\n<\/tr>\n<tr>\n<td><strong>VLAN<\/strong><\/td>\n<td>Ba\u015flang\u0131\u00e7 i\u00e7in de\u011ferli; trunk\/routing\/ACL bypass riski [10]<\/td>\n<td>M\u00fcmk\u00fcnse fiziksel ayr\u0131m + enforcement cihaz\u0131 ile desteklenmeli<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"caption\" style=\"text-align: center\"><em>Tablo 3: Katmanl\u0131 Savunma Bile\u015fenleri [1][5][10]<\/em><\/p>\n<h2>Zero Trust ve Mikro Segmentasyon<\/h2>\n<p>Zero Trust, a\u011f\u0131n ihlal edilmi\u015f olabilece\u011fi varsay\u0131m\u0131 alt\u0131nda her istekte en az ayr\u0131cal\u0131kla eri\u015fim karar\u0131 verir. NIST SP 800-207, mikro segmentasyonda kaynaklar\u0131n ayr\u0131 segmentlere kondu\u011funu ve her segmentin gateway\/PEP taraf\u0131ndan korundu\u011funu a\u00e7\u0131klar[2]. OT\u2019de bu; cell\/area bazl\u0131 segmentler, m\u00fchendislik istasyonu \u2192 PLC ak\u0131\u015flar\u0131n\u0131n yaln\u0131zca tan\u0131ml\u0131 bak\u0131m pencerelerinde a\u00e7\u0131lmas\u0131, HMI \u2192 PLC komutlar\u0131n\u0131n operasyon rol\u00fc + MFA + jump host \u00fczerinden gelmesi anlam\u0131na gelir.<\/p>\n<h3>Deterministik Trafik Baselining<\/h3>\n<p>OT a\u011flar\u0131nda trafik desenleri IT\u2019ye k\u0131yasla \u00e7ok daha deterministiktir. NIST, bu determinizmin IDS\/IPS\/BAD\/SIEM ile anomali yakalamada kritik oldu\u011funu ve sens\u00f6rlerin \u00f6\u011frenme modu ile OT trafi\u011fine g\u00f6re tune edilmesini \u00f6nerir[1][10].<\/p>\n<h3>Protokol G\u00fcvenli\u011fi: OPC UA ve IEC 62351<\/h3>\n<p>OPC UA g\u00fcvenlik modeli; client\/server do\u011frulama, X.509 sertifikalar\u0131, ileti\u015fim b\u00fct\u00fcnl\u00fc\u011f\u00fc\/gizlili\u011fi ve audit trail i\u00e7erir<sup>[13]<\/sup>. IEC 62351 ise IEC 60870-5, IEC 61850 gibi enerji kontrol protokollerinin ileti\u015fim g\u00fcvenli\u011fine odaklan\u0131r<sup>[14]<\/sup>.<\/p>\n<h1>Teknik Risk Skorlama Modeli<\/h1>\n<p>NIST riski etki ve olas\u0131l\u0131k fonksiyonu olarak tan\u0131mlar<sup>[3]<\/sup>. NREL&#8217;in VaR cercevesi kontrol uygulama d\u00fczeyi (CI) ile riskin indirgenebilece\u011fini form\u00fclle\u015ftirir<sup>[7]<\/sup>:<\/p>\n<div class=\"risk-formula\">VaR = L \u00d7 (1 \u2212 CI_seg) \u00d7 I<br \/>\nL = Olay olasiligi (0-1) \u00a0|\u00a0 CI_seg = Segmentasyon olgunlu\u011fu (0-1) \u00a0|\u00a0 I = Etki (0-1)<\/div>\n<table>\n<tbody>\n<tr>\n<th>Durum<\/th>\n<th>L<\/th>\n<th>CI_seg<\/th>\n<th>I<\/th>\n<th>VaR<\/th>\n<\/tr>\n<tr>\n<td><strong>Ba\u015flang\u0131\u00e7 (VLAN var, DMZ s\u0131n\u0131rl\u0131)<\/strong><\/td>\n<td>0.40<\/td>\n<td>0.20<\/td>\n<td>0.70<\/td>\n<td><strong>0.224<\/strong><\/td>\n<\/tr>\n<tr>\n<td><strong>Hedef (DMZ+jump+mikro seg+DPI)<\/strong><\/td>\n<td>0.40<\/td>\n<td>0.70<\/td>\n<td>0.70<\/td>\n<td><strong>0.084<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"caption\"><em>\u00a0 \u00a0 Tablo 4: NREL VaR &#8212; Segmentasyon Olgunlu\u011funun Etkisi [7]<\/em><\/p>\n<p>Segmentasyon olgunlu\u011fu, risk g\u00f6stergesini <strong>~%62 azaltmaktadir<\/strong>\u00a0(0.224 \u2192 0.084)<sup>[7][3]<\/sup>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3248\" src=\"https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-2-risk-azaltma.png\" alt=\"\" width=\"1400\" height=\"700\" srcset=\"https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-2-risk-azaltma.png 1400w, https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-2-risk-azaltma-300x150.png 300w, https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-2-risk-azaltma-1024x512.png 1024w, https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-2-risk-azaltma-768x384.png 768w, https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-2-risk-azaltma-350x175.png 350w, https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-2-risk-azaltma-540x270.png 540w, https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-2-risk-azaltma-920x460.png 920w, https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-2-risk-azaltma-730x365.png 730w, https:\/\/renewasoft.com.tr\/wp-content\/uploads\/2026\/02\/seg-gorsel-2-risk-azaltma-600x300.png 600w\" sizes=\"auto, (max-width: 1400px) 100vw, 1400px\" \/><\/p>\n<p class=\"caption\" style=\"text-align: center\"><em>Infografik: Segmentasyon Olgunluk Seviyeleri ve Risk Azaltma [7]<\/em><\/p>\n<h1>Vaka Analizi: HES Sald\u0131r\u0131 Sim\u00fclasyonu<\/h1>\n<div class=\"callout-red\">\n<p><strong>\ud83d\udca5 Kan\u0131ta Dayal\u0131 Arka Plan<\/strong><\/p>\n<p><strong>Ukrayna 2015:<\/strong> Sald\u0131rganlar kontrol sistemlerini do\u011frudan kullanarak operasyon gercekle\u015ftirdi; BlackEnergy\/KillDisk eri\u015fimi kolayla\u015ft\u0131rd\u0131<sup>[5]<\/sup>.<\/p>\n<p><strong>ICS-CERT:<\/strong> KillDisk MBR&#8217;yi bozarak sistemleri kullan\u0131lmaz hale getirdi; Windows HMI&#8217;lar ve seri-Ethernet firmware etkilendi<sup>[6]<\/sup>.<\/p>\n<p><strong>Bowman Baraji 2013:<\/strong> Yetkisiz SCADA eri\u015fimi; $30K+ iyile\u015ftirme maliyeti<sup>[12]<\/sup>.<\/p>\n<\/div>\n<table>\n<tbody>\n<tr>\n<th>#<\/th>\n<th>Asama<\/th>\n<th>Teknik Adim<\/th>\n<th>Segmentasyon Etkisi<\/th>\n<\/tr>\n<tr>\n<td><strong>1<\/strong><\/td>\n<td><strong>Initial Access<\/strong><\/td>\n<td>Spearphishing ile kurumsal a\u011fa giri\u015f [5]<\/td>\n<td>IT segmentasyonu ilk bariyeri olu\u015fturur<\/td>\n<\/tr>\n<tr>\n<td><strong>2<\/strong><\/td>\n<td><strong>Credential Access<\/strong><\/td>\n<td>Domain kimlik bilgileri + VPN ke\u015ffi [5]<\/td>\n<td>MFA + PAM credential harvesting&#8217;i bloke eder<\/td>\n<\/tr>\n<tr>\n<td><strong>3<\/strong><\/td>\n<td><strong>Pivot (IT\u2192OT)<\/strong><\/td>\n<td>Dual-homed EWS \u00fczerinden OT&#8217;ye geci\u015f [6]<\/td>\n<td>DMZ + jump server + data diode pivot&#8217;u engeller<\/td>\n<\/tr>\n<tr>\n<td><strong>4<\/strong><\/td>\n<td><strong>Lateral Movement<\/strong><\/td>\n<td>OT icinde RDP\/SMB ile yay\u0131l\u0131m [6]<\/td>\n<td>Mikro segmentasyon cell bazl\u0131 izolasyon<\/td>\n<\/tr>\n<tr>\n<td><strong>5<\/strong><\/td>\n<td><strong>Impact<\/strong><\/td>\n<td>Breaker\/gate kontrol, wiper, DoV\/DoC [5][6]<\/td>\n<td>Segmentasyon 3-4. ad\u0131mlar\u0131 zorla\u015ft\u0131r\u0131r<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"caption\"><em>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Tablo 5: Model Saldiri Ak\u0131\u015f\u0131 ve Segmentasyonun Etkisi [5][6]<\/em><\/p>\n<p>DOE&#8217;nin dokumani HES siber olaylarinin kamu guvenligi, kritik altyapi ve sebeke enerji dagitimini etkileyebilecegini vurgular<sup>[8]<\/sup>. 100 MW HES&#8217;te 4 saatlik durak = 400 MWh kayip + piyasa\/restart maliyetleri.<\/p>\n<h1>Hydrowise: G\u00fcvenli Entegrasyon Mimarisi<\/h1>\n<p><strong>Hydrowise<\/strong>, SCADA\/IoT&#8217;den ger\u00e7ek zamanl\u0131 veri toplayarak \u00fcretim tahmini, kestirimci bakim, su debisi \u00f6ng\u00f6r\u00fcs\u00fc ve EP\u0130A\u015e entegrasyonu sunan u\u00e7tan uca dijital enerji y\u00f6netim platformudur<sup>[13]<\/sup>. G\u00fcvenlik mimarisi: (1) OT kontrol b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fc korumak, (2) veriyi analitik katmana g\u00fcvenli ta\u015f\u0131mak.<\/p>\n<h2>DMZ Referans Mimarisi<\/h2>\n<table>\n<tbody>\n<tr>\n<th>Zone<\/th>\n<th>Bilesenler<\/th>\n<th>Guvenlik Kontrolleri<\/th>\n<\/tr>\n<tr>\n<td><strong>Zone 0-2 (Field\/Control)<\/strong><\/td>\n<td>PLC\/RTU, I\/O aglari, turbin-gate kontrol hucreleri<\/td>\n<td>Mikro seg: her hucre izole; DPI ile Modbus FC kontrolu<\/td>\n<\/tr>\n<tr>\n<td><strong>Zone 3 (Supervisory)<\/strong><\/td>\n<td>SCADA sunuculari, historian, HMI<\/td>\n<td>HMI\u2192PLC yalnizca izinli host\/protokol; ML baseline<\/td>\n<\/tr>\n<tr>\n<td><strong>Zone 3.5 (OT DMZ)<\/strong><\/td>\n<td>Hydrowise OT gateway, jump server, log broker<\/td>\n<td>MFA + time-based + session kaydi; opsiyonel data diode<\/td>\n<\/tr>\n<tr>\n<td><strong>Zone 4-5 (Enterprise\/Cloud)<\/strong><\/td>\n<td>SOC\/SIEM, kurumsal IAM, Hydrowise UI<\/td>\n<td>OT&#8217;ye dogrudan erisim yok; DMZ uzerinden kontrollu akis<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"caption\">Tablo 6: Hydrowise DMZ Referans Mimarisi [1][2][9]<\/p>\n<p>Kritik ilke: Hydrowise OT collector\u00a0<strong>yalnizca read-only telemetri toplar<\/strong>; kontrol komutu uretmez. Kimlik dogrulama OPC UA X.509 sertifika tabanl\u0131d\u0131r<sup>[13]<\/sup>.<\/p>\n<div class=\"callout\">\n<p><strong>\ud83d\udd0d HPP-Ozgu AI Yetenekleri<\/strong><\/p>\n<p><strong>Su Debisi Tahmini:<\/strong>\u00a0ML modeli; yagis, kar erimesi, havza parametreleri ile egitilir. 72 saat tahmin penceresi.<\/p>\n<p><strong>Uretim Tahmini:<\/strong>\u00a0Rezervuar + su debisi + turbin verimi + piyasa fiyatlari entegre. EP\u0130A\u015e GOP\/GIP hizali.<\/p>\n<p><strong>Kestirimci Bakim:<\/strong>\u00a0Turbin titresim, yatak sicakligi, yag kalitesi, sargi yalitimi coklu degisken anomali skorlamasi.<\/p>\n<p><strong>EP\u0130A\u015e Entegrasyonu:<\/strong>\u00a0GOP\/GIP fiyat optimizasyonu, otomatik teklif, dengesizlik risk analizi ve gelir maksimizasyonu.<\/p>\n<\/div>\n<h1>Sonu\u00e7<\/h1>\n<p>OT\/IT segmentasyonu ve mikro segmentasyon; HES&#8217;lerde \u00fcretim s\u00fcreklili\u011fi ve safety&#8217;nin par\u00e7as\u0131d\u0131r<sup>[1][10]<\/sup>. Hydrowise, do\u011fru segmentasyonla dijital enerji y\u00f6netimini g\u00fcvenli mimariye oturtur<sup>[13]<\/sup>.<\/p>\n<h1><\/h1>\n<p>[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>[vc_row][vc_column][vc_column_text css=&#8221;&#8221;] OT\/IT Ag Segmentasyonu ve Mikro Segmentasyon HES&#8217;lerde Guvenli SCADA Mimarisi: Purdue Modeli, IEC 62443 ve Zero Trust Renewasoft | 2026 Seviye: Ileri\u00a0\u00a0 Hedef Kitle: SCADA Muhendisi, HES Isletmecisi, CTO, Altyapi Yatirimcisi Giri\u015f: Dijital D\u00f6n\u00fc\u015f\u00fcm\u00fcn G\u00fcvenlik \u00d6nko\u015fulu HES operasyonlar\u0131nda verimlilik hedefleri; ger\u00e7ek zamanl\u0131 izleme, uzaktan eri\u015fim, merkezi raporlama ve AI tabanl\u0131 kestirimci analiti\u011fi h\u0131zla [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1863],"tags":[435,431,433,437],"class_list":["post-3057","post","type-post","status-publish","format-standard","hentry","category-kritik-altyapi-siber-guvenligi-ve-endustriyel-sistem-guvenligi","tag-hes-scada-guvenligi","tag-iec-62443","tag-purdue-modeli","tag-zero-trust-mikro-segmentasyon"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>OT\/IT A\u011f Segmentasyonu ve Mikro Segmentasyon Enerji \u015eirketleri \u0130\u00e7in G\u00fcvenli Mimari Tasar\u0131m\u0131 - Renewasoft Enerji ve Yaz\u0131l\u0131m A.\u015e<\/title>\n<meta name=\"description\" content=\"HES&#039;lerde OT\/IT a\u011f segmentasyonu ve mikro segmentasyonun mimari temelleri, Zero Trust yakla\u015f\u0131m\u0131, risk skorlama modeli ve 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