{"id":1138,"date":"2021-04-29T21:31:24","date_gmt":"2021-04-29T19:31:24","guid":{"rendered":"http:\/\/dety.net.ua\/?p=1138"},"modified":"2021-04-29T21:31:24","modified_gmt":"2021-04-29T19:31:24","slug":"remote-desktop-gateway-client-error-the-kerberos-client-received-a-krb_ap_err_modified-error-from-the-server-servername","status":"publish","type":"post","link":"https:\/\/dety.net.ua\/?p=1138","title":{"rendered":"Remote Desktop Gateway + client error: The Kerberos client received a KRB_AP_ERR_MODIFIED error from the server servername$"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">I&#8217;ve setup a new RDG server but couldn&#8217;t connect to it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The client PC registered in the eventlog: <strong>The Kerberos client received a KRB_AP_ERR_MODIFIED error from the server servername$. The target name used was HTTP\/externalservername.com<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After some searching I&#8217;ve solved this by modifying SPN records for the server on a DC.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So I ran: <strong>setspn -Q host\/servername<\/strong> and get the list of SPNs for this server.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Then I added the new record: <strong>setspn -A HTTP\/externalservername.com servername$<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">And voila  &#8211; It worked.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It&#8217;s strange because I didn&#8217;t have such issues for other RDG hosts and they don&#8217;t have additional SPNs for an external address.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I&#8217;ve setup a new RDG server but couldn&#8217;t connect to it. The client PC registered in the eventlog: The Kerberos client received a KRB_AP_ERR_MODIFIED error from the server servername$. The target name used was HTTP\/externalservername.com After some searching I&#8217;ve solved this by modifying SPN records for the server on a DC. So I ran: setspn [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1138","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/dety.net.ua\/index.php?rest_route=\/wp\/v2\/posts\/1138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dety.net.ua\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dety.net.ua\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dety.net.ua\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dety.net.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1138"}],"version-history":[{"count":1,"href":"https:\/\/dety.net.ua\/index.php?rest_route=\/wp\/v2\/posts\/1138\/revisions"}],"predecessor-version":[{"id":1139,"href":"https:\/\/dety.net.ua\/index.php?rest_route=\/wp\/v2\/posts\/1138\/revisions\/1139"}],"wp:attachment":[{"href":"https:\/\/dety.net.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dety.net.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dety.net.ua\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}