{"id":3008,"date":"2026-03-20T14:53:32","date_gmt":"2026-03-20T13:53:32","guid":{"rendered":"https:\/\/www.seclab-security.com\/?post_type=avada_faq&#038;p=3008"},"modified":"2026-04-01T19:56:56","modified_gmt":"2026-04-01T17:56:56","slug":"electronic-airgap-vs-ot-firewall-which-protection-to-choose","status":"publish","type":"avada_faq","link":"https:\/\/www.seclab-security.com\/en\/faq-items\/electronic-airgap-vs-ot-firewall-which-protection-to-choose\/","title":{"rendered":"Electronic AirGap vs. OT Firewall: Which Protection to Choose?"},"content":{"rendered":"<div style=\"font-family: 'TT Firs Neue Trial Var Roman', sans-serif; font-size: 20px;\">\n<p style=\"font-weight: 400;\"><strong>An OT firewall filters network traffic according to configurable rules. The Electronic AirGap, on the other hand, completely eliminates network connectivity between two zones. <\/strong>These are complementary approaches: the firewall controls traffic flows, while the Electronic AirGap removes the very possibility of unauthorized network traffic.<\/p>\n<p style=\"font-weight: 400;\"><strong>Why a firewall alone is not enough in OT environments<\/strong><\/p>\n<p style=\"font-weight: 400;\">Industrial firewalls have several vulnerabilities in operational contexts:<\/p>\n<ul style=\"font-weight: 400;\">\n<li>They require regular updates (firmware, signatures, rules), often incompatible with maintenance windows limited to a few hours per year.<\/li>\n<li>They rely on software and remain vulnerable to configuration errors, zero-day exploits, and attacks targeting TCP\/IP layers.<\/li>\n<li>Their effectiveness depends on the quality and constant updating of their rules.<\/li>\n<\/ul>\n<p style=\"font-weight: 400;\"><strong>The Electronic AirGap approach<\/strong><\/p>\n<p style=\"font-weight: 400;\">By removing the transport and network layers through an electronic protocol break, the Electronic AirGap inherently eliminates an entire category of attacks. Maintenance is minimal: on average, one software update per year. Protection does not rely on up-to-date signatures or rule maintenance.<\/p>\n<p style=\"font-weight: 400;\">The Electronic AirGap does not systematically replace a firewall. It complements it within a defense-in-depth strategy, protecting the most critical perimeter\u2014where a compromise would have major operational impact.<\/p>\n<div><\/div>\n<blockquote style=\"background-color: #f0f0f0; color: #1a1a1a; border-left: 4px solid #cccccc; padding: 1em 1.25em; margin: 1.5em 0; font-size: 20px;\"><p><strong>Key takeaway \u2014<\/strong> Where a firewall filters traffic, the Electronic AirGap breaks network continuity. Both are complementary: the firewall for routine segmentation, the Electronic AirGap for isolating the most critical assets.<\/p><\/blockquote>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>An OT firewall filters network traffic according to configurable rules.  [&#8230;]<\/p>\n","protected":false},"author":5,"featured_media":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"footnotes":""},"faq_category":[79],"class_list":["post-3008","avada_faq","type-avada_faq","status-publish","format-standard","hentry","faq_category-network-isolation"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Electronic AirGap vs. OT Firewall: Which Protection to Choose? - Seclab Security<\/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:\/\/www.seclab-security.com\/en\/faq-items\/electronic-airgap-vs-ot-firewall-which-protection-to-choose\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Electronic AirGap vs. OT Firewall: Which Protection to Choose? - Seclab Security\" \/>\n<meta property=\"og:description\" content=\"An OT firewall filters network traffic according to configurable rules. 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