{"id":2144,"date":"2010-09-06T18:56:00","date_gmt":"2010-09-06T16:56:00","guid":{"rendered":"https:\/\/www.boc.de\/watchguard-info-portal\/xcs-dns-problem-behindert-reputation-authority-und-dnsbl\/"},"modified":"2016-08-23T14:35:39","modified_gmt":"2016-08-23T12:35:39","slug":"xcs-dns-problem-behindert-reputation-authority-und-dnsbl","status":"publish","type":"post","link":"https:\/\/wordpress.boc.de\/watchguard-info-portal\/2010\/09\/xcs-dns-problem-behindert-reputation-authority-und-dnsbl\/","title":{"rendered":"XCS: DNS-Problem behindert Reputation Authority und DNSBL"},"content":{"rendered":"<p>Am heutigen Montag, 06.09.2010, trat gegen 10 Uhr ein Problem in der DNS-Zone &#8222;borderware.com&#8220; auf, weswegen die IP-Adressen der <strong>WatchGuard Reputation Authority<\/strong> und der von Borderware und der WatchGuard XCS verwendeten <strong>DNSBL-Server<\/strong> nicht mehr aufgel\u00f6st werden konnten. Das Problem war zwar kurze Zeit sp\u00e4ter bereits wieder behoben, wegen des weltweiten Abgleichs der DNS-Resolver kommt es jedoch auch jetzt (19 Uhr) noch zu Problemen, da u.a. auch die bekannten Telekom-Server 194.25.0.52, 194.25.0.60, 194.25.0.68, 194.25.2.129 z.B. den Hostname &#8222;www.reputationauthority.org&#8220; noch immer nicht aufl\u00f6sen k\u00f6nnen.<\/p>\n<p>Auf der WatchGuard XCS tritt das Problem unter anderem so in Erscheinung, dass eingehende E-Mails bereits auf dem Connection Layer abgelehnt werden: <br \/>connect to mail.xxx.de[xxx.xxx.xxx.xxx]: server refused to talk to me: 550 Client host rejected: [not accepting mail from this ip]\n<p><a href=\"http:\/\/1.bp.blogspot.com\/_haYpXd-8uFA\/TIUkZQgAdoI\/AAAAAAAAAME\/EJM0PawICNQ\/s1600\/xcs-dns-100906.JPG\"><img decoding=\"async\" style=\"cursor:pointer; cursor:hand;width: 320px; height: 122px;\" src=\"http:\/\/1.bp.blogspot.com\/_haYpXd-8uFA\/TIUkZQgAdoI\/AAAAAAAAAME\/EJM0PawICNQ\/s320\/xcs-dns-100906.JPG\" border=\"0\" alt=\"\"id=\"BLOGGER_PHOTO_ID_5513853335129585282\" \/><\/a><\/p>\n<p>Ich habe das Problem heute auf drei WatchGuard XCS Installationen kurzerhand und <strong>vor\u00fcbergehend<\/strong> so gel\u00f6st, indem ich die \u00dcberpr\u00fcfungen anhand der Reputation Authority und DNSBL ausgeschaltet, sowie den internen DNS Cache der XCS disabled habe. Diese Einstellungen werde ich in 1-2 Tagen wieder r\u00fcckg\u00e4ngig machen, wenn die DNS-Aufl\u00f6sung aller Systeme wieder korrekt funktioniert. Dadurch wird zwar die Spam-Quote in den n\u00e4chsten 1-2 Tagen geringf\u00fcgig h\u00f6her sein, jedoch k\u00f6nnen jetzt nat\u00fcrlich auch die ganzen legitimen E-Mails wieder zugestellt werden.<\/p>\n<p><em>Security > Connection Control:<\/em><br \/>&nbsp;&nbsp;&nbsp;<em>Reject on Reputation<\/em> <b>*AUS*<\/b>,<br \/>&nbsp;&nbsp;&nbsp;<em>Reject on infection<\/em> <b>*AUS*<\/b>,<br \/>&nbsp;&nbsp;&nbsp;<em>Reject on DNSBL<\/em> <b>*AUS*<\/b><br \/><em>Activity > Status&#038;Utility > Flush DNS Cache > Flush<br \/>Configuration > Interfaces:<\/em><br \/>&nbsp;&nbsp;&nbsp;<em>Enable DNS Cache<\/em> <b>*AUS*<\/b><\/p>\n<div class=\"shariff\"><ul class=\"shariff-buttons theme-default orientation-horizontal buttonsize-medium\"><li class=\"shariff-button mailto shariff-nocustomcolor\" style=\"background-color:#b32317\"><a href=\"mailto:?body=https%3A%2F%2Fwordpress.boc.de%2Fwatchguard-info-portal%2F2010%2F09%2Fxcs-dns-problem-behindert-reputation-authority-und-dnsbl%2F&subject=XCS%3A%20DNS-Problem%20behindert%20Reputation%20Authority%20und%20DNSBL\" title=\"Per E-Mail versenden\" aria-label=\"Per E-Mail versenden\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; 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auf, weswegen die IP-Adressen der WatchGuard Reputation Authority und der von Borderware und der WatchGuard XCS verwendeten DNSBL-Server nicht mehr aufgel\u00f6st werden konnten. Das Problem war zwar kurze Zeit sp\u00e4ter bereits wieder behoben, wegen des weltweiten Abgleichs der DNS-Resolver kommt es jedoch auch jetzt (19 Uhr) noch zu Problemen, da u.a. &hellip; <a href=\"https:\/\/wordpress.boc.de\/watchguard-info-portal\/2010\/09\/xcs-dns-problem-behindert-reputation-authority-und-dnsbl\/\" class=\"more-link\">Weiterlesen <span class=\"screen-reader-text\">XCS: DNS-Problem behindert Reputation Authority und DNSBL<\/span> <span class=\"meta-nav\">&raquo;<\/span><\/a><\/p>\n<div class=\"shariff\"><ul class=\"shariff-buttons theme-default orientation-horizontal buttonsize-medium\"><li class=\"shariff-button mailto shariff-nocustomcolor\" style=\"background-color:#b32317\"><a href=\"mailto:?body=https%3A%2F%2Fwordpress.boc.de%2Fwatchguard-info-portal%2F2010%2F09%2Fxcs-dns-problem-behindert-reputation-authority-und-dnsbl%2F&subject=XCS%3A%20DNS-Problem%20behindert%20Reputation%20Authority%20und%20DNSBL\" title=\"Per E-Mail versenden\" aria-label=\"Per E-Mail versenden\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; 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