{"id":27328,"date":"2021-06-11T14:30:21","date_gmt":"2021-06-11T13:30:21","guid":{"rendered":"https:\/\/www.ispreview.co.uk\/?p=27328"},"modified":"2021-06-11T15:10:44","modified_gmt":"2021-06-11T14:10:44","slug":"bt-prep-firmware-fix-for-dns-request-hungry-wifi-repeaters","status":"publish","type":"post","link":"https:\/\/www.ispreview.co.uk\/index.php\/2021\/06\/bt-prep-firmware-fix-for-dns-request-hungry-wifi-repeaters.html","title":{"rendered":"BT Prep Firmware Fix for DNS Request Hungry WiFi Repeaters"},"content":{"rendered":"<p>Customers of UK broadband ISP <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/go\/britishtelecom\" rel=\"nofollow\" target=\"_blank\">BT<\/a>, specifically those with one of the operator&#8217;s Mini Whole Home Wi-Fi systems (mesh repeaters) and a custom DNS setup on their personal network, have been told to expect a firmware patch, again, after complaining that their connections were making masses of DNS lookups to Google and Microsoft.<!--more--><\/p>\n<p>The existing <strong>Domain Name System<\/strong> (DNS) works by converting Internet Protocol (IP) addresses into a human-readable form (e.g. 123.56.32.1 to examplezfakedomain.co.uk) and back again. In that context, a DNS lookup is the process by which a DNS record is returned from a DNS server (i.e. kind of like looking up a phone number in the phone book).<\/p>\n<div class=\"bq2\"><strong>NOTE:<\/strong> The <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/go\/britishtelecom\" rel=\"nofollow\" target=\"_blank\">BT<\/a> Mini Whole Home <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/wifi\">WiFi<\/a> system can also be used with other broadband ISPs, but the same issue can occur.<\/div>\n<p>Back in February 2020 some of <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/go\/britishtelecom\" rel=\"nofollow\" target=\"_blank\">BT<\/a>&#8217;s customers began noticing that each of the operator&#8217;s mesh repeater dishes were sending masses of DNS lookup requests to <strong>Microsoft.com<\/strong> (<a href=\"https:\/\/community.bt.com\/t5\/BT-Devices\/BT-Mini-Whole-Home-DNS-requests-for-Microsoft-Google-and-Apple\/td-p\/2001908\" target=\"_blank\" rel=\"noopener\">here<\/a>) &#8211; roughly akin to one lookup per second per dish (some people have multiple dishes), and if they blocked those then the devices would simply start doing the same for <strong>Apple.com<\/strong> and then <strong>Google.com<\/strong> etc.<\/p>\n<p>The customers concerned had all switched their network to use a custom DNS provider (e.g. OpenDNS, Google Public DNS etc.) instead of BT&#8217;s, which meant that those DNS providers started to flag some of their connections as &#8220;<em>suspicious<\/em>&#8221; due to the unusual excess of DNS lookups (i.e. disrupting access to some internet services and resulting in more sites checking to see if you&#8217;re a robot before granting access &#8211; <a href=\"https:\/\/www.google.com\/recaptcha\/about\/\" target=\"_blank\" rel=\"noopener\">captcha style<\/a>).<\/p>\n<p>At the time BT promised to issue a firmware update to resolve the issue, but according to <a href=\"https:\/\/www.theregister.com\/2021\/06\/11\/bt_wifi_disc_dns_lookup_huge_volumes\/\" target=\"_blank\" rel=\"noopener\">The Register<\/a> it never materialised. The good news is that, more than a year later, such an update may finally be coming.<\/p>\n<blockquote class=\"bq1\"><p><strong>A BT Spokesperson said:<\/strong><\/p>\n<p>&#8220;We understand how important connectivity is to our customers and like other products on the market, BT Mini Whole Home Wi-Fi has server requests built in to alert customers of any connection issues as quickly as possible. We recognise that there are a small number of customers who have personally set up a custom DNS server configuration at home, and that the frequency of these checks can lead to them seeing additional network traffic.<\/p>\n<p>We have included an update within a new wider firmware, which significantly reduces the frequency of these server requests. We had planned to roll this out sooner, however due to changes in prioritisation following the exceptional circumstances of the past year, this has taken longer than anticipated. We would like to apologise to the small number of customers impacted by this matter.&#8221;<\/p><\/blockquote>\n<p>No doubt Microsoft, Apple and Google will really appreciate BT making masses of DNS lookups in order to help identify connection issues with the operator&#8217;s broadband and <a href=\"https:\/\/www.ispreview.co.uk\/index.php\/link\/wifi\">WiFi<\/a> kit. The question now is when will the new firmware actually surface? Affected customers have already been waiting for over a year.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Customers of UK broadband ISP BT, specifically those with one of the operator&#8217;s Mini Whole Home Wi-Fi systems (mesh repeaters) and a custom DNS setup on their personal network, have been told to expect a firmware patch, again, after complaining that their connections were making masses of DNS lookups to Google and Microsoft.<\/p>\n","protected":false},"author":1,"featured_media":27334,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[1],"tags":[474,479,476],"class_list":["post-27328","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uk_isp_news","tag-bt","tag-security","tag-wifi"],"share_on_mastodon":{"url":"","error":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>BT Prep Firmware Fix for DNS Request Hungry WiFi Repeaters - 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