{"id":3510,"date":"2022-06-29T09:26:57","date_gmt":"2022-06-29T06:26:57","guid":{"rendered":"http:\/\/turknetwp.local\/?p=3510"},"modified":"2023-01-30T13:28:18","modified_gmt":"2023-01-30T10:28:18","slug":"session-border-controller-sbc-nedir","status":"publish","type":"post","link":"https:\/\/www.turk.net\/blog\/session-border-controller-sbc-nedir\/","title":{"rendered":"Session Border Controller (SBC) Nedir?"},"content":{"rendered":"

Oturum S\u0131n\u0131r\u0131 Denetleyicisi olarak adland\u0131r\u0131lan SBC, son cihazlardan veya uygulama sunucular\u0131ndan gelen uyumsuz sinyal mesajlar\u0131 ve medya ak\u0131\u015flar\u0131 (oturumlar) aras\u0131nda uyumlu \u00e7al\u0131\u015fmay\u0131 sa\u011flar. Ayn\u0131 zamanda IP \u00fczerinden ses aktar\u0131m\u0131 (VoIP) altyap\u0131lar\u0131n\u0131 g\u00fcvence alt\u0131na alan bir a\u011f i\u015flevidir.\u00a0<\/span><\/p>\n

H.323 ve Skinny gibi kurumsal a\u011flarda kullan\u0131lan bir\u00e7ok sinyalleme t\u00fcr\u00fcn\u00fc tarihsel olarak destekleyen SBC’ler art\u0131k a\u011f\u0131rl\u0131kl\u0131 olarak SIP (Oturum Ba\u015flatma Protokol\u00fc) altyap\u0131lar\u0131n\u0131n g\u00fcvenli\u011fini sa\u011flamaya odaklanm\u0131\u015ft\u0131r.\u00a0<\/span><\/p>\n

SBC’ler kurumsal altyap\u0131larda veya ticari konut, i\u015f, sabit hat veya mobil VoIP hizmetleri sunan herhangi bir ta\u015f\u0131y\u0131c\u0131 a\u011fda kullan\u0131l\u0131r. Genellikle hem a\u011f ucunda hem de ta\u015f\u0131y\u0131c\u0131 ara ba\u011flant\u0131larda, kullan\u0131c\u0131lar ve di\u011fer hizmet sa\u011flay\u0131c\u0131lar aras\u0131ndaki s\u0131n\u0131r noktalar\u0131nda konu\u015fland\u0131r\u0131l\u0131r.<\/span><\/p>\n

Session Border Controller (SBC) Ne \u0130\u015fe Yarar?<\/span><\/h2>\n

SIP son yirmi y\u0131lda geli\u015fti\u011finden, SBC’ler farkl\u0131 protokol s\u00fcr\u00fcmleri ve iste\u011fe ba\u011fl\u0131 ba\u015fl\u0131klar aras\u0131nda birlikte \u00e7al\u0131\u015fmay\u0131 sa\u011flamada \u00e7ok de\u011ferlidir.<\/span><\/p>\n

Bir SBC, bir \u00e7ekirdek SIP a\u011f\u0131n\u0131 ve uygulama sunucular\u0131n\u0131 g\u00fcvence alt\u0131na al\u0131r. Bunu yaparken arka arkaya kullan\u0131c\u0131 arac\u0131s\u0131 (B2BUA) rol\u00fcn\u00fc yerine getirerek istemci ve sunucunun birlikte \u00e7al\u0131\u015fmas\u0131n\u0131 sa\u011flar.\u00a0<\/span><\/p>\n

Bir SBC’nin bir ileti\u015fim oturumunu tane tane, hi\u00e7bir noktay\u0131 atlamadan kontrol edebilmesi gerekir. Bu da her oturumu etkin bir \u015fekilde sonland\u0131r\u0131p ard\u0131ndan yeniden kurmas\u0131yla ve her \u00e7a\u011fr\u0131 aya\u011f\u0131ndaki her bir sinyal mesaj\u0131 i\u00e7in hem bir kullan\u0131c\u0131 arac\u0131 sunucusu (UAS), hem de kullan\u0131c\u0131 arac\u0131s\u0131 istemcisi (UAC) olarak hareket etmesiyle m\u00fcmk\u00fcn olabilir.<\/span><\/p>\n

SBC’ler, hatal\u0131 bi\u00e7imlendirilmi\u015f paket istismarlar\u0131n\u0131 ortadan kald\u0131rmak i\u00e7in her mesaj\u0131 ayr\u0131\u015ft\u0131r\u0131r. DDOS sald\u0131r\u0131lar\u0131n\u0131 \u00f6nlemek i\u00e7in de kapsaml\u0131 giri\u015f eri\u015fim kontrol listeleri (ACL’ler) ve h\u0131z s\u0131n\u0131rlamas\u0131 uygular.\u00a0<\/span><\/p>\n

Session Border Controller (SBC) \u00d6zellikleri<\/span><\/h2>\n

Modern SBC uygulamalar\u0131nda, sinyalle\u015fme ve medya bile\u015fenleri birbirinden ayr\u0131l\u0131r ve ayr\u0131 a\u011f \u00f6\u011feleri olarak \u00e7al\u0131\u015f\u0131r. Bu, her bir i\u015flevin en ideal mant\u0131ksal veya fiziksel a\u011f katman\u0131nda yer almas\u0131n\u0131 sa\u011flarken, her i\u015flevin ba\u011f\u0131ms\u0131z olarak \u00f6l\u00e7e\u011fini geni\u015fletmesine izin verir.<\/span><\/p>\n

Ayr\u0131 sinyalleme ve medya i\u015flevlerine sahip bir SBC, standartla\u015ft\u0131r\u0131lm\u0131\u015f ara birimlere sahip, hiyerar\u015fik bir d\u00fczende farkl\u0131 i\u015flevde bir\u00e7ok bile\u015fen i\u00e7eren IP \u00c7oklu Ortam Sistemi (IMS) referans mimarisiyle de uyumludur. Bu mimari, \u00e7ok katmanl\u0131 ve de y\u00fcksek d\u00fczeyde ayr\u0131\u015ft\u0131r\u0131lm\u0131\u015f bir modeldir.\u00a0<\/span><\/p>\n

SBC\u2019nin (Session Border Controller) fonksiyonel gereksinimleri, konumlar\u0131na (eri\u015fim \/ ara ba\u011flant\u0131) ve sinyal ya da medya teslim edip etmediklerine ba\u011fl\u0131 olarak 3GPP IMS Teknik \u015eartnamesi TS 23.228 kapsam\u0131nda ayr\u0131lm\u0131\u015ft\u0131r.<\/span><\/p>\n

Session Border Controller (SBC) Uygulamalar\u0131<\/span><\/h2>\n

SBC\u2019ler, Oturum A\u00e7\u0131klama Protokol\u00fc (SDP) gibi her bir SIP ba\u015fl\u0131\u011f\u0131n\u0131 ve y\u00fck\u00fc i\u015fleyerek, mesaj \u00f6\u011felerini de\u011fi\u015ftirmek ve birlikte \u00e7al\u0131\u015fmay\u0131 etkinle\u015ftirmek i\u00e7in karma\u015f\u0131k kurallar y\u00fcr\u00fctebilir. Tan\u0131nan standartlar\u0131n (STUN, TURN ve ICE) onaylanmas\u0131ndan \u00f6nce, SBC\u2019ler SIP trafi\u011finin IPv4 A\u011f Adresi \u00c7evirisi (NAT) ger\u00e7ekle\u015ftiren cihazlar aras\u0131nda ge\u00e7i\u015f yapmas\u0131n\u0131 sa\u011flamak i\u00e7in de kullan\u0131l\u0131yordu.<\/span><\/p>\n

Bir Session Border Controller, sinyal iletilerini i\u015flemenin yan\u0131 s\u0131ra, tipik olarak RTP bi\u00e7imindeki t\u00fcm medya trafi\u011fini de y\u00f6netir. Bu, bir SBC’nin yaln\u0131zca medya ak\u0131\u015flar\u0131n\u0131 g\u00fcvence alt\u0131na almas\u0131n\u0131 sa\u011flamakla kalmaz, ayn\u0131 zamanda istemcilerin ve sunucular\u0131n ortak kodlay\u0131c\u0131 yetenekleri konusunda anla\u015famad\u0131\u011f\u0131 durumlarda kod d\u00f6n\u00fc\u015ft\u00fcrme uygulamas\u0131n\u0131 da sa\u011flar.\u00a0<\/span><\/p>\n

SBC ayn\u0131 zamanda yasal m\u00fcdahalenin ger\u00e7ekle\u015ftirildi\u011fi noktad\u0131r. SBC\u2019ler ba\u015flang\u0131\u00e7ta \u00f6zel donan\u0131m ara\u00e7lar\u0131yken, \u00e7a\u011fda\u015f sat\u0131c\u0131lar art\u0131k bunlar\u0131 x86 tabanl\u0131 ticari kullan\u0131ma haz\u0131r (COTS) sunucu platformlar\u0131nda \u00e7al\u0131\u015fan saf yaz\u0131l\u0131m \u00f6\u011feleri olarak uygulamaya alm\u0131\u015flard\u0131r.\u00a0<\/span><\/p>\n

Geli\u015fmekte olan NFV altyap\u0131lar\u0131nda kendilerini kan\u0131tlam\u0131\u015f yenilik\u00e7i SBC donan\u0131mlar\u0131 da mevcuttur. Bunlar hem donan\u0131m (VM) hem de i\u015fletim sistemi (Container) sanalla\u015ft\u0131rma kullan\u0131r. Maliyet, performans ve \u00f6l\u00e7ek baz\u0131ndaki avantajlar\u0131 birlikte d\u00fc\u015f\u00fcn\u00fcld\u00fc\u011f\u00fcnde bu SBC\u2019ler, geni\u015f \u00f6l\u00e7ekli LTE \u00dczerinden Ses Da\u011f\u0131t\u0131mlar\u0131 (VoLTE) i\u00e7in ideal hale gelmi\u015ftir.\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Oturum S\u0131n\u0131r\u0131 Denetleyicisi olarak adland\u0131r\u0131lan SBC, son cihazlardan veya uygulama sunucular\u0131ndan gelen uyumsuz sinyal mesajlar\u0131 ve medya ak\u0131\u015flar\u0131 (oturumlar) aras\u0131nda uyumlu \u00e7al\u0131\u015fmay\u0131 sa\u011flar. Ayn\u0131 zamanda IP \u00fczerinden ses aktar\u0131m\u0131 (VoIP) altyap\u0131lar\u0131n\u0131 g\u00fcvence alt\u0131na alan bir a\u011f i\u015flevidir.\u00a0 H.323 ve Skinny gibi kurumsal a\u011flarda kullan\u0131lan bir\u00e7ok sinyalleme t\u00fcr\u00fcn\u00fc tarihsel olarak destekleyen SBC’ler art\u0131k a\u011f\u0131rl\u0131kl\u0131 olarak SIP […]<\/p>\n","protected":false},"author":7,"featured_media":4839,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-3510","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-internet-terimleri"],"acf":[],"yoast_head":"\nSession Border Controller (SBC) Nedir? - Turknet Blog<\/title>\n<meta name=\"description\" content=\"Session Border Controller (SBC) nedir? \u00d6zellikleri ve uygulamalar\u0131 nelerdir? 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