GRC Shields UP! port prober<\/a>). The SAR Guide website also included interesting information on other configuration items that were not always clear from the Solwise manuals and help text.<\/p>\nNow that my router is no longer visible on the Internet, it seems to stay up as it did for the first year I was on ADSL (just under 13 days and counting as I write this). I can only assume that the problem was a denial of service (DoS) attack, that has now been prevented through the stealthing of the router.<\/p>\n
Obviously, there are many types of router out there, but by following the same steps, it should be possible to stealth most ADSL routers, even if the user interface is slightly different.<\/p>\n","protected":false},"excerpt":{"rendered":"
Since about April 2004, I’ve been having problems with my ADSL router at home (a Solwise SAR 110). As the hardware was just over 12 months old (and hence just out of warranty), the cynical side of me was resigned to the fact that it had just “broken”. Not wanting to lose my configuration settings … Continue reading Preventing denial of service attacks on an ADSL router<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[],"tags":[87,43],"class_list":["post-390","post","type-post","status-publish","format-standard","hentry","tag-adsl","tag-security"],"yoast_head":"\nPreventing denial of service attacks on an ADSL router - markwilson.it<\/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.markwilson.co.uk\/blog\/2004\/07\/preventing-denial-of-service-attacks.htm\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Preventing denial of service attacks on an ADSL router - markwilson.it\" \/>\n<meta property=\"og:description\" content=\"Since about April 2004, I’ve been having problems with my ADSL router at home (a Solwise SAR 110). As the hardware was just over 12 months old (and hence just out of warranty), the cynical side of me was resigned to the fact that it had just “broken”. Not wanting to lose my configuration settings … Continue reading Preventing denial of service attacks on an ADSL router\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.markwilson.co.uk\/blog\/2004\/07\/preventing-denial-of-service-attacks.htm\" \/>\n<meta property=\"og:site_name\" content=\"markwilson.it\" \/>\n<meta property=\"article:published_time\" content=\"2004-07-19T08:43:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2007-05-15T14:50:01+00:00\" \/>\n<meta name=\"author\" content=\"Mark Wilson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@markwilsonit\" \/>\n<meta name=\"twitter:site\" content=\"@markwilsonit\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Mark Wilson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2004\\\/07\\\/preventing-denial-of-service-attacks.htm#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2004\\\/07\\\/preventing-denial-of-service-attacks.htm\"},\"author\":{\"name\":\"Mark Wilson\",\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/#\\\/schema\\\/person\\\/98f61365e7c39d6be942174b8c4de468\"},\"headline\":\"Preventing denial of service attacks on an ADSL router\",\"datePublished\":\"2004-07-19T08:43:00+00:00\",\"dateModified\":\"2007-05-15T14:50:01+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2004\\\/07\\\/preventing-denial-of-service-attacks.htm\"},\"wordCount\":269,\"commentCount\":4,\"publisher\":{\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/#\\\/schema\\\/person\\\/98f61365e7c39d6be942174b8c4de468\"},\"keywords\":[\"ADSL\",\"Security\"],\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2004\\\/07\\\/preventing-denial-of-service-attacks.htm#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2004\\\/07\\\/preventing-denial-of-service-attacks.htm\",\"url\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2004\\\/07\\\/preventing-denial-of-service-attacks.htm\",\"name\":\"Preventing denial of service attacks on an ADSL router - markwilson.it\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/#website\"},\"datePublished\":\"2004-07-19T08:43:00+00:00\",\"dateModified\":\"2007-05-15T14:50:01+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2004\\\/07\\\/preventing-denial-of-service-attacks.htm#breadcrumb\"},\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2004\\\/07\\\/preventing-denial-of-service-attacks.htm\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2004\\\/07\\\/preventing-denial-of-service-attacks.htm#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Preventing denial of service attacks on an ADSL router\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/\",\"name\":\"markwilson.it\",\"description\":\"get-info -class technology | write-output > \\\/dev\\\/web\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/#\\\/schema\\\/person\\\/98f61365e7c39d6be942174b8c4de468\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-GB\"},{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/#\\\/schema\\\/person\\\/98f61365e7c39d6be942174b8c4de468\",\"name\":\"Mark Wilson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\\\/\\\/i0.wp.com\\\/www.markwilson.co.uk\\\/blog\\\/uploads\\\/image-4.png?fit=800%2C800&ssl=1\",\"url\":\"https:\\\/\\\/i0.wp.com\\\/www.markwilson.co.uk\\\/blog\\\/uploads\\\/image-4.png?fit=800%2C800&ssl=1\",\"contentUrl\":\"https:\\\/\\\/i0.wp.com\\\/www.markwilson.co.uk\\\/blog\\\/uploads\\\/image-4.png?fit=800%2C800&ssl=1\",\"width\":800,\"height\":800,\"caption\":\"Mark Wilson\"},\"logo\":{\"@id\":\"https:\\\/\\\/i0.wp.com\\\/www.markwilson.co.uk\\\/blog\\\/uploads\\\/image-4.png?fit=800%2C800&ssl=1\"},\"description\":\"A Chartered IT Professional, with recent experience in technology leadership, IT strategy and practice management roles, Mark Wilson is an Enterprise Architect in the Advisory and Management Group at risual. During a career spanning more than two decades, Mark has gained widespread recognition as an expert in his field including both industry and national press exposure. In addition to certifications from Microsoft, VMware, Red Hat, The Open Group and Axelos, Mark held a Microsoft Most Valuable Professional (MVP) award for three years and is now part of the MVP Reconnect programme. Mark is also well-known on social media and maintains an award-winning blog.\",\"sameAs\":[\"http:\\\/\\\/www.markwilson.co.uk\\\/\",\"https:\\\/\\\/www.instagram.com\\\/markwilsonuk\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/in\\\/markawilson\\\/\",\"https:\\\/\\\/x.com\\\/markwilsonit\",\"https:\\\/\\\/www.youtube.com\\\/channel\\\/UCWHlZCoHRTocdvtrOJ2IL4A\"],\"url\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/author\\\/mark-wilson\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Preventing denial of service attacks on an ADSL router - markwilson.it","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.markwilson.co.uk\/blog\/2004\/07\/preventing-denial-of-service-attacks.htm","og_locale":"en_GB","og_type":"article","og_title":"Preventing denial of service attacks on an ADSL router - markwilson.it","og_description":"Since about April 2004, I’ve been having problems with my ADSL router at home (a Solwise SAR 110). As the hardware was just over 12 months old (and hence just out of warranty), the cynical side of me was resigned to the fact that it had just “broken”. Not wanting to lose my configuration settings … Continue reading Preventing denial of service attacks on an ADSL router","og_url":"https:\/\/www.markwilson.co.uk\/blog\/2004\/07\/preventing-denial-of-service-attacks.htm","og_site_name":"markwilson.it","article_published_time":"2004-07-19T08:43:00+00:00","article_modified_time":"2007-05-15T14:50:01+00:00","author":"Mark Wilson","twitter_card":"summary_large_image","twitter_creator":"@markwilsonit","twitter_site":"@markwilsonit","twitter_misc":{"Written by":"Mark Wilson","Estimated reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.markwilson.co.uk\/blog\/2004\/07\/preventing-denial-of-service-attacks.htm#article","isPartOf":{"@id":"https:\/\/www.markwilson.co.uk\/blog\/2004\/07\/preventing-denial-of-service-attacks.htm"},"author":{"name":"Mark Wilson","@id":"https:\/\/www.markwilson.co.uk\/blog\/#\/schema\/person\/98f61365e7c39d6be942174b8c4de468"},"headline":"Preventing denial of service attacks on an ADSL router","datePublished":"2004-07-19T08:43:00+00:00","dateModified":"2007-05-15T14:50:01+00:00","mainEntityOfPage":{"@id":"https:\/\/www.markwilson.co.uk\/blog\/2004\/07\/preventing-denial-of-service-attacks.htm"},"wordCount":269,"commentCount":4,"publisher":{"@id":"https:\/\/www.markwilson.co.uk\/blog\/#\/schema\/person\/98f61365e7c39d6be942174b8c4de468"},"keywords":["ADSL","Security"],"inLanguage":"en-GB","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.markwilson.co.uk\/blog\/2004\/07\/preventing-denial-of-service-attacks.htm#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.markwilson.co.uk\/blog\/2004\/07\/preventing-denial-of-service-attacks.htm","url":"https:\/\/www.markwilson.co.uk\/blog\/2004\/07\/preventing-denial-of-service-attacks.htm","name":"Preventing denial of service attacks on an ADSL router - markwilson.it","isPartOf":{"@id":"https:\/\/www.markwilson.co.uk\/blog\/#website"},"datePublished":"2004-07-19T08:43:00+00:00","dateModified":"2007-05-15T14:50:01+00:00","breadcrumb":{"@id":"https:\/\/www.markwilson.co.uk\/blog\/2004\/07\/preventing-denial-of-service-attacks.htm#breadcrumb"},"inLanguage":"en-GB","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.markwilson.co.uk\/blog\/2004\/07\/preventing-denial-of-service-attacks.htm"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.markwilson.co.uk\/blog\/2004\/07\/preventing-denial-of-service-attacks.htm#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.markwilson.co.uk\/blog"},{"@type":"ListItem","position":2,"name":"Preventing denial of service attacks on an ADSL router"}]},{"@type":"WebSite","@id":"https:\/\/www.markwilson.co.uk\/blog\/#website","url":"https:\/\/www.markwilson.co.uk\/blog\/","name":"markwilson.it","description":"get-info -class technology | write-output > \/dev\/web","publisher":{"@id":"https:\/\/www.markwilson.co.uk\/blog\/#\/schema\/person\/98f61365e7c39d6be942174b8c4de468"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.markwilson.co.uk\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-GB"},{"@type":["Person","Organization"],"@id":"https:\/\/www.markwilson.co.uk\/blog\/#\/schema\/person\/98f61365e7c39d6be942174b8c4de468","name":"Mark Wilson","image":{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/i0.wp.com\/www.markwilson.co.uk\/blog\/uploads\/image-4.png?fit=800%2C800&ssl=1","url":"https:\/\/i0.wp.com\/www.markwilson.co.uk\/blog\/uploads\/image-4.png?fit=800%2C800&ssl=1","contentUrl":"https:\/\/i0.wp.com\/www.markwilson.co.uk\/blog\/uploads\/image-4.png?fit=800%2C800&ssl=1","width":800,"height":800,"caption":"Mark Wilson"},"logo":{"@id":"https:\/\/i0.wp.com\/www.markwilson.co.uk\/blog\/uploads\/image-4.png?fit=800%2C800&ssl=1"},"description":"A Chartered IT Professional, with recent experience in technology leadership, IT strategy and practice management roles, Mark Wilson is an Enterprise Architect in the Advisory and Management Group at risual. During a career spanning more than two decades, Mark has gained widespread recognition as an expert in his field including both industry and national press exposure. In addition to certifications from Microsoft, VMware, Red Hat, The Open Group and Axelos, Mark held a Microsoft Most Valuable Professional (MVP) award for three years and is now part of the MVP Reconnect programme. Mark is also well-known on social media and maintains an award-winning blog.","sameAs":["http:\/\/www.markwilson.co.uk\/","https:\/\/www.instagram.com\/markwilsonuk\/","https:\/\/www.linkedin.com\/in\/markawilson\/","https:\/\/x.com\/markwilsonit","https:\/\/www.youtube.com\/channel\/UCWHlZCoHRTocdvtrOJ2IL4A"],"url":"https:\/\/www.markwilson.co.uk\/blog\/author\/mark-wilson"}]}},"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":5434,"url":"https:\/\/www.markwilson.co.uk\/blog\/2014\/12\/reconfiguring-a-plusnet-adsl-router-technicolor-tg582n.htm","url_meta":{"origin":390,"position":0},"title":"Reconfiguring a PlusNet ADSL router (Technicolor TG582n)","author":"Mark Wilson","date":"Friday 5 December 2014","format":false,"excerpt":"This post is probably not much\u00a0interest to many people but\u00a0it might help some if, like me, you're trying to re-configure a Technicolor TG582n ADSL router from Plusnet. Just make sure you read all the way to the end and save yourself some time! For the last 11 years, my ADSL\u2026","rel":"","context":"In "Technology"","block_context":{"text":"Technology","link":"https:\/\/www.markwilson.co.uk\/blog\/topic\/technology"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1525,"url":"https:\/\/www.markwilson.co.uk\/blog\/2009\/09\/enabling-snmp-on-my-adsl-router.htm","url_meta":{"origin":390,"position":1},"title":"Enabling SNMP on my ADSL router","author":"Mark Wilson","date":"Wednesday 9 September 2009","format":false,"excerpt":"I've been playing around with some network monitoring and management tools on my home network and so have been busily enabling Simple Network Management Protocol (SNMP) on a number of my devices, including my elderly Solwise SAR110 ADSL modem\/router; however the router's web interface doesn't seem to have the ability\u2026","rel":"","context":"In \"Networking hardware\"","block_context":{"text":"Networking hardware","link":"https:\/\/www.markwilson.co.uk\/blog\/tag\/networking-hardware"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":6233,"url":"https:\/\/www.markwilson.co.uk\/blog\/2015\/11\/reconfiguring-plusnet-adsl-router-sagemcom-2704n.htm","url_meta":{"origin":390,"position":2},"title":"Reconfiguring a Plusnet ADSL router (Sagemcom 2704n)","author":"Mark Wilson","date":"Saturday 21 November 2015","format":false,"excerpt":"I've been trying to improve my Skype call quality at home and the guys I work with who know about this sort of stuff have suggested that my cheap ISP-supplied router may be part of the problem. Put simply, the Technicolor TG582n that Plusnet shipped me last year is fine\u2026","rel":"","context":"In "Technology"","block_context":{"text":"Technology","link":"https:\/\/www.markwilson.co.uk\/blog\/topic\/technology"},"img":{"alt_text":"PlusNet router blocks ICMP","src":"https:\/\/i0.wp.com\/www.markwilson.co.uk\/blog\/images\/plusnet-adsl-noicmp.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.markwilson.co.uk\/blog\/images\/plusnet-adsl-noicmp.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.markwilson.co.uk\/blog\/images\/plusnet-adsl-noicmp.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.markwilson.co.uk\/blog\/images\/plusnet-adsl-noicmp.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":756,"url":"https:\/\/www.markwilson.co.uk\/blog\/2007\/03\/woohoo-8mbps-adsl.htm","url_meta":{"origin":390,"position":3},"title":"Woohoo! 8Mbps ADSL","author":"Mark Wilson","date":"Tuesday 27 March 2007","format":false,"excerpt":"PlusNet upgraded our ADSL connection to their \"up to 8Mbps\" service today. I'm told that it may take a few days to settle down (they advised us to reboot the router once a day for 10 days or so) but the initial connection was a whopping 7552Kbps (7.375Mbps). After the\u2026","rel":"","context":"In \"ADSL\"","block_context":{"text":"ADSL","link":"https:\/\/www.markwilson.co.uk\/blog\/tag\/adsl"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2256,"url":"https:\/\/www.markwilson.co.uk\/blog\/2011\/01\/diagnosing-connection-issues-on-my-adsl-line.htm","url_meta":{"origin":390,"position":4},"title":"Diagnosing connection issues on my ADSL line","author":"Mark Wilson","date":"Tuesday 4 January 2011","format":false,"excerpt":"For months now, I've been complaining about my ADSL connection and I'm pleased to say that I think I've found the issue: it looks as though I had too many TCP\/IP sessions open (multiple computers, browser tabs, etc.) and so some connections were getting dropped, so I increased the maximum\u2026","rel":"","context":"In \"ADSL\"","block_context":{"text":"ADSL","link":"https:\/\/www.markwilson.co.uk\/blog\/tag\/adsl"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":659,"url":"https:\/\/www.markwilson.co.uk\/blog\/2007\/01\/gigabit-ethernet-for-home-office.htm","url_meta":{"origin":390,"position":5},"title":"Gigabit Ethernet for the home office","author":"Mark Wilson","date":"Thursday 11 January 2007","format":false,"excerpt":"Until now, my home office network has been centred around my NetGear ProSafe DS108 10\/100Mbps Ethernet hub attached to various computers, a D-Link DWL2000-AP+ wireless access point, a Solwise SAR 110 ADSL router and a downstream Gigabyte 5-port 10\/100Mbps switch (because my Mac refused to place nicely with the hub).\u2026","rel":"","context":"In \"Networking hardware\"","block_context":{"text":"Networking hardware","link":"https:\/\/www.markwilson.co.uk\/blog\/tag\/networking-hardware"},"img":{"alt_text":"","src":"http:\/\/www.assoc-amazon.co.uk\/e\/ir?t=marsweblo-21&l=ur2&o=2","width":350,"height":200},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/posts\/390","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/comments?post=390"}],"version-history":[{"count":0,"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/posts\/390\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/media?parent=390"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/categories?post=390"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/tags?post=390"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}