{"id":583,"date":"2006-02-13T22:39:00","date_gmt":"2006-02-13T22:39:00","guid":{"rendered":"http:\/\/markwilson.me.uk\/blog\/2006\/02\/google-web-accelerator-mixed-blessing.htm"},"modified":"2007-07-09T16:05:03","modified_gmt":"2007-07-09T15:05:03","slug":"google-web-accelerator-mixed-blessing","status":"publish","type":"post","link":"https:\/\/www.markwilson.co.uk\/blog\/2006\/02\/google-web-accelerator-mixed-blessing.htm","title":{"rendered":"Google web accelerator &#8211; a mixed blessing"},"content":{"rendered":"<p><!--113987038345278964-->A few days back, I noticed that my PC&#8217;s IP address was reported by a website as being 72.14.192.45.  That address isn&#8217;t in my IP stack, and isn&#8217;t my router&#8217;s ISP-provided IP address either.<\/p>\n<p>After <a href=\"http:\/\/www.dnsstuff.com\/tools\/whois.ch?ip=72.14.192.45\">checking the address out at DNSstuff<\/a>, I found that address is registered to Google and then I remembered that I&#8217;d installed the <a href=\"http:\/\/webaccelerator.google.com\/\">Google web accelerator<\/a>.  As far as I can see, this is acting as a big proxy server, caching and prefetching my Internet search requests.  It claims so far to have speeded up my downloads by 25% but there are some negative points too:<\/p>\n<ul>\n<li><a href=\"http:\/\/news.zdnet.co.uk\/internet\/security\/0,39020375,39197327,00.htm\">Some people have reported being logged in to websites as someone else<\/a> &#8211; it seems that Google caches personal details, meaning that unsecured (HTTP) logins are cached.  HTTPS sessions are not stored though.<\/li>\n<li><a href=\"http:\/\/www.37signals.com\/svn\/archives2\/the_google_web_accelerator_is_back_with_a_vengeance.php\">Some websites have recorded difficulties with Google&#8217;s prefetching having unexpected results on dynamic pages<\/a>.<\/li>\n<li><a href=\"http:\/\/fantomaster.com\/gwa-forbidden.html\">Some webmasters have decided that the prefetching steals too many of their CPU cycles and have blocked access to those who have the Google web accelerator enabled<\/a>.  <a href=\"http:\/\/nowebaccelerator.com\/blocked.php\">Privacy advocates have similar concerns<\/a>.<\/li>\n<li><a href=\"https:\/\/www.markwilson.co.uk\/blog\/2005\/11\/geotagging-websites.htm\">Some sites use geolocation to determine whether or not the viewer is local to the content<\/a>.  I tried to stream some content from the BBC tonight and was met with <a href=\"http:\/\/www.bbc.co.uk\/broadband\/mediaplayer\/players\/bbc2\/non_uk.shtml\">a message informing me that the content was restricted to UK users<\/a> (Google&#8217;s address is flagged as American &#8211; my ISP-provided address is British).<\/li>\n<\/ul>\n<p>It is possible to stop the web accelerator from caching certain sites, as well as switching it on\/off without re-installing &#8211; details of this, along with how it all works can be found at the <a href=\"http:\/\/webaccelerator.google.com\/support.html\">Google web accelerator support page<\/a>, but to be honest, that&#8217;s a pain in the backside &#8211; I already have to switch my proxy settings when I jump from my corporate VPN to my home network and don&#8217;t want to have to think about another set of proxies.  On that basis, I think the web accelerator will be off my PC soon.<\/p>\n<p>As a web site administrator, I&#8217;ll also be giving serious thought to <a href=\"http:\/\/fantomaster.com\/fantomNews\/archives\/2005\/05\/05\/fantomtiphow-to-block-google%e2%80%99s-web-accelerator\/\">implementing a Google web accelerator blocking method<\/a> (and the <a href=\"http:\/\/fantomaster.com\/fantomNews\/archives\/2005\/05\/06\/fantomtip-how-to-block-google%e2%80%99s-web-accelerator-update\/\">update<\/a>).  Rather than blocking IP ranges, I&#8217;m more likely to <a href=\"http:\/\/www.xoops.org\/modules\/news\/article.php?storyid=2781\">reject x-moz: prefetch requests<\/a> and, instead of sending back a <a href=\"https:\/\/www.markwilson.co.uk\/blog\/2004\/12\/implementing-custom-error-pages-for.htm\">custom HTTP error page<\/a>, I&#8217;ll probably refer to <a href=\"http:\/\/nowebaccelerator.com\/howto.php\">no web accelerator (unnecessary proxying considered harmful)<\/a>.<\/p>\n<p>To Google&#8217;s credit, they have published <a href=\"http:\/\/webaccelerator.google.com\/webmasterhelp.html\">web accelerator information for webmasters<\/a>.  What&#8217;s not clear to me though, is <a href=\"http:\/\/www.google.com\/webmasters\/faq.html\">whether or not blocking\/ignoring prefetch requests will also prevent Google from crawling my site<\/a>.  I&#8217;d rather lose a few bytes to a prefetch than see my page ranking start to slide.<\/p>\n<p>Whilst writing this post, I found that <a href=\"http:\/\/www.xoops.org\/modules\/news\/article.php?storyid=2781\">some versions of Firefox also prefetch by default<\/a> (I&#8217;m using Firefox 1.5 and that certainly does).  Most websites don&#8217;t seem to care about this as they are looking for Google&#8217;s web accelerator IP addresses, but any form of prefetch will load unnecessary content over slow links, or hit web servers with unnecessary requests.  For details, <a href=\"http:\/\/www.mozilla.org\/projects\/netlib\/Link_Prefetching_FAQ.html\">read more about prefetching<\/a> or to turn this off in Firefox&#8217;s <a href=\"about:config\" rel=\"nofollow\">about:config<\/a>, set network.prefetch.next to false.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A few days back, I noticed that my PC&#8217;s IP address was reported by a website as being 72.14.192.45. That address isn&#8217;t in my IP stack, and isn&#8217;t my router&#8217;s ISP-provided IP address either. After checking the address out at DNSstuff, I found that address is registered to Google and then I remembered that I&#8217;d &hellip; <a href=\"https:\/\/www.markwilson.co.uk\/blog\/2006\/02\/google-web-accelerator-mixed-blessing.htm\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Google web accelerator &#8211; a mixed blessing<\/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":[79],"class_list":["post-583","post","type-post","status-publish","format-standard","hentry","tag-google"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Google web accelerator - a mixed blessing - 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\/2006\/02\/google-web-accelerator-mixed-blessing.htm\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Google web accelerator - a mixed blessing - markwilson.it\" \/>\n<meta property=\"og:description\" content=\"A few days back, I noticed that my PC&#8217;s IP address was reported by a website as being 72.14.192.45. That address isn&#8217;t in my IP stack, and isn&#8217;t my router&#8217;s ISP-provided IP address either. After checking the address out at DNSstuff, I found that address is registered to Google and then I remembered that I&#8217;d &hellip; Continue reading Google web accelerator &#8211; a mixed blessing\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.markwilson.co.uk\/blog\/2006\/02\/google-web-accelerator-mixed-blessing.htm\" \/>\n<meta property=\"og:site_name\" content=\"markwilson.it\" \/>\n<meta property=\"article:published_time\" content=\"2006-02-13T22:39:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2007-07-09T15:05:03+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=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2006\\\/02\\\/google-web-accelerator-mixed-blessing.htm#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2006\\\/02\\\/google-web-accelerator-mixed-blessing.htm\"},\"author\":{\"name\":\"Mark Wilson\",\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/#\\\/schema\\\/person\\\/98f61365e7c39d6be942174b8c4de468\"},\"headline\":\"Google web accelerator &#8211; 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After checking the address out at DNSstuff, I found that address is registered to Google and then I remembered that I&#8217;d &hellip; Continue reading Google web accelerator &#8211; a mixed blessing","og_url":"https:\/\/www.markwilson.co.uk\/blog\/2006\/02\/google-web-accelerator-mixed-blessing.htm","og_site_name":"markwilson.it","article_published_time":"2006-02-13T22:39:00+00:00","article_modified_time":"2007-07-09T15:05:03+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":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.markwilson.co.uk\/blog\/2006\/02\/google-web-accelerator-mixed-blessing.htm#article","isPartOf":{"@id":"https:\/\/www.markwilson.co.uk\/blog\/2006\/02\/google-web-accelerator-mixed-blessing.htm"},"author":{"name":"Mark Wilson","@id":"https:\/\/www.markwilson.co.uk\/blog\/#\/schema\/person\/98f61365e7c39d6be942174b8c4de468"},"headline":"Google web accelerator &#8211; a mixed blessing","datePublished":"2006-02-13T22:39:00+00:00","dateModified":"2007-07-09T15:05:03+00:00","mainEntityOfPage":{"@id":"https:\/\/www.markwilson.co.uk\/blog\/2006\/02\/google-web-accelerator-mixed-blessing.htm"},"wordCount":540,"commentCount":2,"publisher":{"@id":"https:\/\/www.markwilson.co.uk\/blog\/#\/schema\/person\/98f61365e7c39d6be942174b8c4de468"},"keywords":["Google"],"inLanguage":"en-GB","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.markwilson.co.uk\/blog\/2006\/02\/google-web-accelerator-mixed-blessing.htm#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.markwilson.co.uk\/blog\/2006\/02\/google-web-accelerator-mixed-blessing.htm","url":"https:\/\/www.markwilson.co.uk\/blog\/2006\/02\/google-web-accelerator-mixed-blessing.htm","name":"Google web accelerator - a mixed blessing - markwilson.it","isPartOf":{"@id":"https:\/\/www.markwilson.co.uk\/blog\/#website"},"datePublished":"2006-02-13T22:39:00+00:00","dateModified":"2007-07-09T15:05:03+00:00","breadcrumb":{"@id":"https:\/\/www.markwilson.co.uk\/blog\/2006\/02\/google-web-accelerator-mixed-blessing.htm#breadcrumb"},"inLanguage":"en-GB","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.markwilson.co.uk\/blog\/2006\/02\/google-web-accelerator-mixed-blessing.htm"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.markwilson.co.uk\/blog\/2006\/02\/google-web-accelerator-mixed-blessing.htm#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.markwilson.co.uk\/blog"},{"@type":"ListItem","position":2,"name":"Google web accelerator &#8211; a mixed blessing"}]},{"@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 &gt; \/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. 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Integrated - firewall and caching. As a firewall, ISA Server's filtering capabilities\u2026","rel":"","context":"In \"Microsoft ISA Server\"","block_context":{"text":"Microsoft ISA Server","link":"https:\/\/www.markwilson.co.uk\/blog\/tag\/isa"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1905,"url":"https:\/\/www.markwilson.co.uk\/blog\/2010\/06\/how-to-be-an-internet-private-eye.htm","url_meta":{"origin":583,"position":1},"title":"How to be an Internet private eye","author":"Mark Wilson","date":"Monday 21 June 2010","format":false,"excerpt":"This post makes me slightly uneasy... most of the information is taken from a presentation I saw recently - so I would like to give credit to the original presenter, except that he specifically asked me not to.\u00c2\u00a0 The reason for this is that he's not a lawyer, and he\u2026","rel":"","context":"In \"Internet\"","block_context":{"text":"Internet","link":"https:\/\/www.markwilson.co.uk\/blog\/tag\/internet"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":317,"url":"https:\/\/www.markwilson.co.uk\/blog\/2005\/06\/chaining-proxy-servers.htm","url_meta":{"origin":583,"position":2},"title":"Chaining proxy servers","author":"Mark Wilson","date":"Thursday 30 June 2005","format":false,"excerpt":"I spent some time yesterday chaining two ISA Server 2000 proxy arrays. As there doesn't seem to be a lot of information about on the subject, I thought I'd provide some here (most of what can be found easily is about using proxy chaining for anonymity, and mostly reads as\u2026","rel":"","context":"In \"Microsoft ISA Server\"","block_context":{"text":"Microsoft ISA Server","link":"https:\/\/www.markwilson.co.uk\/blog\/tag\/isa"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":5991,"url":"https:\/\/www.markwilson.co.uk\/blog\/2015\/09\/short-takes-checking-your-ip-in-google-writing-to-a-text-file-in-powershell-and-checking-which-security-zone-a-website-is-in.htm","url_meta":{"origin":583,"position":3},"title":"Short takes: checking your IP in Google; writing to a text file in PowerShell; and confirming which IE security zone a website uses in Internet Explorer","author":"Mark Wilson","date":"Friday 18 September 2015","format":false,"excerpt":"Another eclectic mix of snippets merged into a single blog post... What's my IP address? Ever want to check the IP address of the connection you're using? There are lots of websites out there that will tell you, or you can just type what is my IP into Google (other\u2026","rel":"","context":"In &quot;Technology&quot;","block_context":{"text":"Technology","link":"https:\/\/www.markwilson.co.uk\/blog\/topic\/technology"},"img":{"alt_text":"Check the security zone in Internet Explorer","src":"https:\/\/i0.wp.com\/www.markwilson.co.uk\/blog\/images\/ie11-page-properties.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":899,"url":"https:\/\/www.markwilson.co.uk\/blog\/2007\/09\/attempting-to-reduce-my-websites-bandwidth-usage.htm","url_meta":{"origin":583,"position":4},"title":"Attempting to reduce my website&#8217;s bandwidth usage","author":"Mark Wilson","date":"Thursday 13 September 2007","format":false,"excerpt":"This website is in a spot of trouble. Over the last few months, I've seen the bandwidth usage grow dramatically although it seems to have grown faster than the number of subscribers\/readers. We're not talking vast volumes here and my hosting provider has been very understanding, but even so it's\u2026","rel":"","context":"In \"Useful Websites\"","block_context":{"text":"Useful Websites","link":"https:\/\/www.markwilson.co.uk\/blog\/tag\/useful-websites"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":642,"url":"https:\/\/www.markwilson.co.uk\/blog\/2006\/12\/basic-tcpip-troubleshooting.htm","url_meta":{"origin":583,"position":5},"title":"Basic TCP\/IP troubleshooting","author":"Mark Wilson","date":"Thursday 14 December 2006","format":false,"excerpt":"For the last couple of days, I've been mystified as to why I could access a SharePoint site from other Windows servers on the same LAN but not from clients (Mac, Linux or Windows) elsewhere on the network (and on the Internet). Strangely, the server responded to ping requests, but\u2026","rel":"","context":"In \"TCP\/IP\"","block_context":{"text":"TCP\/IP","link":"https:\/\/www.markwilson.co.uk\/blog\/tag\/tcpip"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/posts\/583","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=583"}],"version-history":[{"count":0,"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/posts\/583\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/media?parent=583"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/categories?post=583"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/tags?post=583"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}