{"id":30203,"date":"2026-05-12T08:06:38","date_gmt":"2026-05-12T12:06:38","guid":{"rendered":"https:\/\/avtech.com\/articles\/?p=30203"},"modified":"2026-06-12T10:23:29","modified_gmt":"2026-06-12T14:23:29","slug":"what-happens-on-the-network-during-a-firmware-update","status":"publish","type":"post","link":"https:\/\/avtech.com\/articles\/30203\/what-happens-on-the-network-during-a-firmware-update\/","title":{"rendered":"What Happens On The Network During A PRO Firmware Update"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">During a firmware update on a Room Alert 32S, 12S or 3S, your system communicates with your device using a combination of standard network traffic and a high volume of UDP packets.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The update process includes the following steps:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Step<\/th><th class=\"has-text-align-left\" data-align=\"left\">Protocol<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">1. Discover the device on the network<\/td><td class=\"has-text-align-left\" data-align=\"left\">UDP<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">2. Unlock the device\u2019s firmware update mode<\/td><td class=\"has-text-align-left\" data-align=\"left\">HTTP or HTTPS<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3. Transfer firmware data to the device<\/td><td class=\"has-text-align-left\" data-align=\"left\">Rapid UDP or HTTP\/HTTPS (device dependent)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">4. Verify and completing the update<\/td><td class=\"has-text-align-left\" data-align=\"left\">UDP and\/or HTTP\/HTTPS<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The actual firmware transfer process may generate a rapid burst of UDP traffic while firmware data is being transmitted to the device; this behavior is expected and is required to complete the update. Because firmware updates involve direct low-level communication with the hardware, the traffic pattern can look unusual compared to normal web browsing or office applications.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Updates Over HTTPS<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When HTTPS is enabled, communication between the utility and the device is encrypted and requires additional negotiation and validation steps.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This can introduce:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Additional network overhead<\/li>\n\n\n\n<li>Longer communication timing requirements<\/li>\n\n\n\n<li>Increased sensitivity to packet loss or filtering<\/li>\n\n\n\n<li>More opportunities for security software to inspect or interrupt traffic<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In environments with strict endpoint protection, deep packet inspection, or advanced firewall policies, HTTPS-enabled communication is more likely to experience interruptions during the firmware update process.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Updates On Networks With Endpoint Security<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Many modern security platforms are designed to detect behavior commonly associated with malicious activity, including high-rate UDP traffic, unexpected device-to-device communication, and repeated packet transmissions. As a result, some security products may rate-limit packets, modify packet headers in transit, drop UDP traffic, interrupt the firmware transfer, or terminate the update entirely.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Examples of software that may affect updates include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Endpoint Detection &amp; Response (EDR) platforms<\/li>\n\n\n\n<li>Antivirus software<\/li>\n\n\n\n<li>Advanced firewalls<\/li>\n\n\n\n<li>Network intrusion prevention systems<\/li>\n\n\n\n<li>Zero trust network tools<\/li>\n\n\n\n<li>Deep packet inspection appliances<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In some environments, the security software may interpret the firmware transfer as suspicious network activity or a flooding event.<\/p>\n\n\n<div class=\"su-note\"  style=\"border-color:#bcc3cd;border-radius:5px;-moz-border-radius:5px;-webkit-border-radius:5px;\"><div class=\"su-note-inner su-u-clearfix su-u-trim\" style=\"background-color:#d6dde7;border-color:#ffffff;color:#305d8c;border-radius:5px;-moz-border-radius:5px;-webkit-border-radius:5px;\">\n\n\n\n<p class=\"wp-block-paragraph\">The traffic generated during the firmware update process is expected behavior required to transfer firmware data to the device; however, because the transfer involves rapid UDP communication, some security systems can classify the activity as suspicious unless appropriate exceptions are configured.<\/p>\n\n\n<\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Common symptoms of security software interference include:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Devices discovered but updates failing<\/li>\n\n\n\n<li>Firmware transfer starting but never completing<\/li>\n\n\n\n<li>Random timeout errors<\/li>\n\n\n\n<li>Updates working on one network but not another<\/li>\n\n\n\n<li>Updates succeeding only after disabling security software<\/li>\n\n\n\n<li>Updates succeeding from a home network but failing on a corporate network<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Best Practices<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If updates are failing consistently, we recommend:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Temporarily disabling endpoint security software for testing<\/li>\n\n\n\n<li>Allowing UDP traffic between the update host and the device<\/li>\n\n\n\n<li>Whitelisting the device\u2019s IP address or MAC address<\/li>\n\n\n\n<li>Whitelisting the update utility in antivirus\/EDR software<\/li>\n\n\n\n<li>Trying the update from a less restricted network<\/li>\n\n\n\n<li>Trying the update over direct connection. See <a href=\"https:\/\/avtech.com\/articles\/230\/how-to-connect-a-room-alert-monitor-directly-to-a-computer-advanced-troubleshooting\/\" target=\"_blank\" rel=\"noreferrer noopener\">How To Connect A Room Alert Monitor Directly To A Computer<\/a>.<\/li>\n\n\n\n<li>Working with your IT department to review network security policies<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Your IT or security administrator may need to explicitly allow this traffic if aggressive filtering or flood protection is enabled.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>During a firmware update on a Room Alert 32S, 12S or 3S, your system communicates with your device using a combination of standard network traffic and a high volume of UDP packets. The update process includes the following steps: Step Protocol 1. Discover the device on the network UDP 2. Unlock the device\u2019s firmware update [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[2,9],"tags":[],"class_list":["post-30203","post","type-post","status-publish","format-standard","hentry","category-room-alert","category-faq"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What Happens On The Network During A PRO Firmware Update - AVTECH<\/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:\/\/avtech.com\/articles\/30203\/what-happens-on-the-network-during-a-firmware-update\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Happens On The Network During A PRO Firmware Update - AVTECH\" \/>\n<meta property=\"og:description\" content=\"During a firmware update on a Room Alert 32S, 12S or 3S, your system communicates with your device using a combination of standard network traffic and a high volume of UDP packets. 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