{"id":149009,"date":"2019-07-29T07:00:05","date_gmt":"2019-07-29T06:00:05","guid":{"rendered":"https:\/\/www.stormshield.com\/?p=149009"},"modified":"2023-06-23T14:44:35","modified_gmt":"2023-06-23T13:44:35","slug":"reseaux-it-ot-raisons-convergence-delicate","status":"publish","type":"post","link":"https:\/\/www.stormshield.com\/fr\/actus\/reseaux-it-ot-raisons-convergence-delicate\/","title":{"rendered":"R\u00e9seaux IT-OT : les raisons d\u2019une convergence d\u00e9licate"},"content":{"rendered":"

\"Convergence<\/p>\n

Port\u00e9e par l\u2019industrie du futur, la convergence des r\u00e9seaux industriels (OT) et des r\u00e9seaux informatiques (IT) est \u00e0 l\u2019\u0153uvre dans le monde industriel. Ce ph\u00e9nom\u00e8ne met en lumi\u00e8re les sp\u00e9cificit\u00e9s de ces infrastructures et d\u00e9voile certains risques, notamment en mati\u00e8re de cybers\u00e9curit\u00e9.<\/strong><\/p>\n

Maintenance pr\u00e9dictive, production au plus pr\u00e8s des attentes des consommateurs, les promesses de cette industrie du futur li\u00e9es \u00e0 la convergence des r\u00e9seaux informatiques et industriels abondent. Or, le rapprochement de ces deux types d\u2019infrastructures tr\u00e8s diff\u00e9rents est plus complexe qu\u2019il n\u2019y para\u00eet.<\/p>\n

\u00ab L\u2019industrie du futur vient rajouter une dimension de donn\u00e9es, collect\u00e9es par les machines ou aupr\u00e8s des utilisateurs. La convergence des r\u00e9seaux IT\/OT permet de les utiliser pour r\u00e9duire les temps de maintenance, anticiper les pannes ou encore diminuer les co\u00fbts environnementaux<\/em> \u00bb, expose St\u00e9phane Pr\u00e9vost,<\/strong> Product Marketing Manager Stormshield.<\/p>\n

 <\/p>\n

Une \u00e9volution des infrastructures IT et OT \u00e0 deux vitesses<\/h2>\n

Depuis plusieurs ann\u00e9es d\u00e9j\u00e0, l\u2019industrie a vu s\u2019estomper la fronti\u00e8re entre IT et OT. L\u2019informatique, r\u00e9guli\u00e8rement renouvel\u00e9e dans les postes de contr\u00f4le au sein des ateliers, c\u00f4toie un parc de machines \u00e0 la dur\u00e9e de vie et d\u2019amortissement beaucoup plus \u00e9lev\u00e9es. \u00c0 l\u2019image du convertisseur USB\/RS232 qui permettait \u00e0 une machine qui parle un langage (USB pour un PC) d\u2019\u00eatre comprise par une autre (RS232 pour la machine industrielle), le d\u00e9fi des \u00e9quipes OT<\/a> \u00e9tait donc d\u2019arriver \u00e0 relier ces deux mondes qui n\u2019\u00e9voluent pas au m\u00eame rythme<\/strong>.<\/p>\n

\u00ab\u00a0L\u2019outil industriel a son propre tempo et son propre syst\u00e8me pour connecter les diff\u00e9rents \u00e9l\u00e9ments actifs du r\u00e9seau : le bus terrain. Il a \u00e9t\u00e9 cr\u00e9\u00e9 lors de la deuxi\u00e8me r\u00e9volution industrielle et a permis la production de masse. Il a ensuite surv\u00e9cu \u00e0 la troisi\u00e8me r\u00e9volution industrielle, celle qui a permis l\u2019automatisme, mais la cohabitation avec l\u2019\u00e8re informatique est plus compliqu\u00e9e<\/em>\u00a0\u00bb, explique St\u00e9phane Pr\u00e9vost. En effet, \u00e0 l'heure d'Internet, les commandes des protocoles industriels toujours pr\u00e9sents dans les ateliers et sur les consoles requi\u00e8rent d\u00e9sormais un transfert par TCP\/IP.<\/p>\n

 <\/p>\n

R\u00e9seaux informatiques et r\u00e9seaux industriels : des contextes de conception aux antipodes<\/h2>\n

Les divergences fondamentales en mati\u00e8re de s\u00e9curisation des r\u00e9seaux IT et OT remontent \u00e0 leur conception.<\/p>\n

Les r\u00e9seaux informatiques ont vocation \u00e0 transporter des donn\u00e9es en grande quantit\u00e9. N\u00e9s dans un environnement ouvert, l\u2019interaction est au c\u0153ur de leur fonctionnement et leurs protocoles disposent de version s\u00e9curis\u00e9e. \u00c0 l\u2019inverse, les r\u00e9seaux industriels sont d\u00e9di\u00e9s \u00e0 l\u2019acheminement des commandes pour assurer la bonne gestion du processus industriel<\/a>. G\u00e9n\u00e9ralement con\u00e7us de fa\u00e7on autonome d\u2019un atelier \u00e0 un autre, ces r\u00e9seaux n\u2019ont pas fait l\u2019objet d\u2019une s\u00e9curisation sp\u00e9cifique car ils \u00e9taient consid\u00e9r\u00e9s comme isol\u00e9s et d\u00e9j\u00e0 prot\u00e9g\u00e9s par la politique de s\u00e9curit\u00e9 des usines qui les abritent.<\/p>\n

\u00ab\u00a0L\u2019informatique s\u2019est dot\u00e9e d\u00e8s le d\u00e9part de protocoles de donn\u00e9es s\u00e9curis\u00e9s (https pour la navigation internet, SMTPS pour les \u00e9changes d\u2019e-mails, etc.) alors que dans le cas des r\u00e9seaux op\u00e9rationnels, la s\u00e9curit\u00e9 a \u00e9t\u00e9 pens\u00e9e au niveau du site industriel\u00a0: il n\u2019a pas \u00e9t\u00e9 jug\u00e9 utile de rajouter une couche de protection \u00e0 des r\u00e9seaux d\u00e9velopp\u00e9s dans un environnement confin\u00e9 et s\u00e9curis\u00e9<\/em>\u00a0\u00bb, compl\u00e8te St\u00e9phane Pr\u00e9vost.<\/p>\n

 <\/p>\n

R\u00e9seaux industriels : une gestion singuli\u00e8re<\/h2>\n

Jusque r\u00e9cemment, les industries n\u2019avaient pas besoin de centraliser la gestion de leur infrastructure OT : ces r\u00e9seaux, ind\u00e9pendants les uns des autres et peu expos\u00e9s d\u2019un point de vue cybers\u00e9curit\u00e9, \u00ab\u00a0tombaient en marche<\/em>\u00a0\u00bb gr\u00e2ce \u00e0 l\u2019ing\u00e9niosit\u00e9 des \u00e9quipes sur le terrain !<\/p>\n

\u00c0 mesure que la convergence progresse, le risque augmente et provoque une prise de conscience. Beaucoup d\u2019industriels mettent en place une gouvernance pour b\u00e9n\u00e9ficier d\u2019une meilleure visibilit\u00e9 sur leurs r\u00e9seaux. C\u2019est d\u2019autant plus important que chaque r\u00e9seau industriel est unique. \u00ab\u00a0La singularit\u00e9 des r\u00e9seaux industriels complexifie la mise en place d\u2019une politique de s\u00e9curit\u00e9 commune<\/em>\u00a0\u00bb, r\u00e9sume St\u00e9phane Pr\u00e9vost.<\/p>\n

Finalement, le principal d\u00e9fi de la convergence des r\u00e9seaux IT et OT est d\u2019ordre humain\u00a0: comment les \u00e9quipes informatiques et op\u00e9rationnelles peuvent-elles apprendre \u00e0 se comprendre et s\u2019adapter \u00e0 leurs contraintes respectives\u00a0? Le dialogue entre les \u00e9quipes IT, fortes de leur exp\u00e9rience en cybers\u00e9curit\u00e9, et les \u00e9quipes OT, sp\u00e9cialistes de leur r\u00e9seau industriel, est en effet la cl\u00e9 d\u2019une meilleure s\u00e9curit\u00e9 de l\u2019infrastructure globale.<\/p>\n

 <\/p>\n

Charge \u00e0 elles, ensemble, de mieux identifier, analyser les risques et faciliter la mise en place d\u2019une politique de s\u00e9curit\u00e9 globale IT\/OT.<\/p>\n","protected":false},"excerpt":{"rendered":"

Port\u00e9e par l\u2019industrie du futur, la convergence des r\u00e9seaux industriels (OT) et des r\u00e9seaux informatiques (IT) est \u00e0 l\u2019\u0153uvre dans le monde industriel. Ce ph\u00e9nom\u00e8ne met en lumi\u00e8re les sp\u00e9cificit\u00e9s de ces infrastructures et d\u00e9voile certains risques, notamment en mati\u00e8re de cybers\u00e9curit\u00e9. Maintenance pr\u00e9dictive, production…<\/p>\n","protected":false},"author":48,"featured_media":149007,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1608],"tags":[6564,4368],"business_size":[],"industry":[699],"help_mefind":[],"features":[],"type_security":[758],"maintenance":[],"offer":[],"administration_tools":[],"cloud_offers":[],"listing_product":[6567,1552,1530],"class_list":["post-149009","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-paroles-experts","tag-cybersecurite-industrielle","tag-la-cybersecurite-par-stormshield","industry-industrie-fr","type_security-reseaux","listing_product-sni20-fr","listing_product-sni40-fr","listing_product-sns-fr"],"acf":[],"yoast_head":"\nConvergence OT-IT : les d\u00e9fis cyber des syst\u00e8mes industriels | Stormshield<\/title>\n<meta name=\"description\" content=\"Dans l\u2019industrie, la convergence des r\u00e9seaux industriels (OT) et informatiques (IT) devient strat\u00e9gique. 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