{"id":288,"date":"2006-05-25T06:18:00","date_gmt":"2006-05-25T06:18:00","guid":{"rendered":"http:\/\/markwilson.me.uk\/blog\/2006\/05\/isa-server-2004-gotchas.htm"},"modified":"2007-03-09T13:47:48","modified_gmt":"2007-03-09T13:47:48","slug":"isa-server-2004-gotchas","status":"publish","type":"post","link":"https:\/\/www.markwilson.co.uk\/blog\/2006\/05\/isa-server-2004-gotchas.htm","title":{"rendered":"ISA Server 2004 &#8220;gotchas&#8221;"},"content":{"rendered":"<p><!--114864681032953412-->After having to abort <a href=\"https:\/\/www.markwilson.co.uk\/blog\/2006\/05\/configuring-network-connections-for.htm\">last week&#8217;s attempt to replace an aging Microsoft Proxy Server 2.0 installation with Microsoft Internet Security and Acceleration (ISA) Server 2004<\/a>, last night I had another go and I&#8217;m pleased to say that the ISA Server is now up and running.  There are still some minor issues that I need to resolve, but here&#8217;s a summary of the key points that affected me:<\/p>\n<ul>\n<li>It&#8217;s important to configure the underlying network correctly &#8211; i.e. check the binding order of the various network interfaces, disable unwanted services on the external interface, only configure one interface with a default gateway (the external interface), only configure one interface for DNS and check that there is a valid route configured back to each internal network.  Jim Harrison has written an excellent article on <a href=\"http:\/\/www.isaserver.org\/tutorials\/configuring_isa_server_interface_settings.html\">configuring ISA Server interface settings<\/a>.<\/li>\n<li>By default, ISA Server 2004 will not let any traffic pass (on any interface) &#8211; i.e. it is secure by default.<\/li>\n<li>Do not configure the ISA Server to use both internal and external DNS servers.  The ideal solution is to configure DNS forwarding from the internal DNS server(s) to the ISP&#8217;s DNS servers and create an access rule to allow outbound DNS traffic.  If DNS is configured incorrectly, then the server may have difficulties contacting Active Directory which will have a consequential effect on authentication.<\/li>\n<li>Configure individual access rules to allow all required outbound network services and consider the order of the rules (i.e. is one rule denying access before another is processed).  Multiple rules can be configured for different user sets and schedules.<\/li>\n<li>In general, access rules are used to allow outbound access whilst internal resources are &#8220;published&#8221;.<\/li>\n<li>When publishing HTTP(S) servers, make sure that there is an appropriate web listener configured.<\/li>\n<li>When publishing SMTP (or other) servers, there is no web listener, but there must be an appropriate network listener configured.  Generally, internal SMTP servers will be configured only to allow mail to be received from certain hosts, so it may be necessary to make the traffic appear as if it originated from the ISA Server. Thomas Shinder has written an excellent article on <a href=\"http:\/\/www.isaserver.org\/articles\/2004troubleshootsmtp.html\">troubleshooting SMTP server publishing rules<\/a>.<\/li>\n<li>If restricting access to certain users, ensure that integrated authentication is enabled and authentication is required.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>After having to abort last week&#8217;s attempt to replace an aging Microsoft Proxy Server 2.0 installation with Microsoft Internet Security and Acceleration (ISA) Server 2004, last night I had another go and I&#8217;m pleased to say that the ISA Server is now up and running. There are still some minor issues that I need to &hellip; <a href=\"https:\/\/www.markwilson.co.uk\/blog\/2006\/05\/isa-server-2004-gotchas.htm\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">ISA Server 2004 &#8220;gotchas&#8221;<\/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":[71],"class_list":["post-288","post","type-post","status-publish","format-standard","hentry","tag-isa"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ISA Server 2004 &quot;gotchas&quot; - 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\/05\/isa-server-2004-gotchas.htm\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ISA Server 2004 &quot;gotchas&quot; - markwilson.it\" \/>\n<meta property=\"og:description\" content=\"After having to abort last week&#8217;s attempt to replace an aging Microsoft Proxy Server 2.0 installation with Microsoft Internet Security and Acceleration (ISA) Server 2004, last night I had another go and I&#8217;m pleased to say that the ISA Server is now up and running. There are still some minor issues that I need to &hellip; Continue reading ISA Server 2004 &#8220;gotchas&#8221;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.markwilson.co.uk\/blog\/2006\/05\/isa-server-2004-gotchas.htm\" \/>\n<meta property=\"og:site_name\" content=\"markwilson.it\" \/>\n<meta property=\"article:published_time\" content=\"2006-05-25T06:18:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2007-03-09T13:47:48+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=\"2 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\\\/05\\\/isa-server-2004-gotchas.htm#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2006\\\/05\\\/isa-server-2004-gotchas.htm\"},\"author\":{\"name\":\"Mark Wilson\",\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/#\\\/schema\\\/person\\\/98f61365e7c39d6be942174b8c4de468\"},\"headline\":\"ISA Server 2004 &#8220;gotchas&#8221;\",\"datePublished\":\"2006-05-25T06:18:00+00:00\",\"dateModified\":\"2007-03-09T13:47:48+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2006\\\/05\\\/isa-server-2004-gotchas.htm\"},\"wordCount\":384,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/#\\\/schema\\\/person\\\/98f61365e7c39d6be942174b8c4de468\"},\"keywords\":[\"Microsoft ISA Server\"],\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2006\\\/05\\\/isa-server-2004-gotchas.htm#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2006\\\/05\\\/isa-server-2004-gotchas.htm\",\"url\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2006\\\/05\\\/isa-server-2004-gotchas.htm\",\"name\":\"ISA Server 2004 \\\"gotchas\\\" - markwilson.it\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/#website\"},\"datePublished\":\"2006-05-25T06:18:00+00:00\",\"dateModified\":\"2007-03-09T13:47:48+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2006\\\/05\\\/isa-server-2004-gotchas.htm#breadcrumb\"},\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2006\\\/05\\\/isa-server-2004-gotchas.htm\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2006\\\/05\\\/isa-server-2004-gotchas.htm#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"ISA Server 2004 &#8220;gotchas&#8221;\"}]},{\"@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; 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All I had to do was disconnect the NT 4.0 Proxy Server from the network and power on the new Windows Server 2003 R2 box with Internet Security\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":1013,"url":"https:\/\/www.markwilson.co.uk\/blog\/2008\/03\/problems-with-hyper-v-isa-server-2006-and-tcp-offloading.htm","url_meta":{"origin":288,"position":1},"title":"Problems with Hyper-V, ISA Server 2006 and TCP offloading","author":"Mark Wilson","date":"Saturday 8 March 2008","format":false,"excerpt":"For the last few days, I've been trying to get an ISA Server 2006 installation working and it's been driving me nuts. I was pretty sure that I had my networking sorted, following Jim Harrison's article on configuring ISA Server interface settings (although a colleague did need to point out\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":507,"url":"https:\/\/www.markwilson.co.uk\/blog\/2005\/05\/installing-and-verifying-configuration.htm","url_meta":{"origin":288,"position":2},"title":"Installing and verifying the configuration of an ISA Server 2000 array","author":"Mark Wilson","date":"Friday 6 May 2005","format":false,"excerpt":"Just over a year ago, I posted a blog entry which gives a 10,000 feet view of Microsoft ISA Server 2000. I haven't done anything with ISA Server since then but over the last few days, I've been installing an new ISA Server 2000 array into an existing enterprise for\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":317,"url":"https:\/\/www.markwilson.co.uk\/blog\/2005\/06\/chaining-proxy-servers.htm","url_meta":{"origin":288,"position":3},"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. 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