{"id":11953,"date":"2020-12-08T12:27:56","date_gmt":"2020-12-08T11:27:56","guid":{"rendered":"https:\/\/www.boc.de\/watchguard-info-portal\/?p=11953"},"modified":"2021-01-20T09:43:58","modified_gmt":"2021-01-20T08:43:58","slug":"recaptcha-und-firewalls","status":"publish","type":"post","link":"https:\/\/wordpress.boc.de\/watchguard-info-portal\/2020\/12\/recaptcha-und-firewalls\/","title":{"rendered":"reCaptcha und Firewalls"},"content":{"rendered":"<p>reCaptcha liefert f\u00fcr das Frontend ein komplettes Element mit Eingabefunktion aus, plus eine Information ans Backend damit das Backend<br \/>\nvergleichen kann ob es korrekt ausgef\u00fcllt ist. Wenn dieser Frontend-Part fehlt (durch eine Firewall oder andere Optionen) kann das<br \/>\nFormular nicht erfolgreich abgesendet werden.<\/p>\n<p>Gr\u00fcnde hierf\u00fcr sind:<\/p>\n<p><!--more--><\/p>\n<h3>Lokale Richtlinien auf dem Client Computer<\/h3>\n<p>Das gro\u00dfe Problem hierbei ist das ein Nutzer sehr viel \u201everstellen\u201c kann.<br \/>\nEin Support ist in der Regel dann nur wirklich im direkten Kontakt m\u00f6glich \u2013 und es betrifft auch nur einen bis wenige Nutzer<\/p>\n<ul>\n<li>Adblock, ublock origin, Privacy Addon im BrowserDurch Filterlisten auf die gstatic.com, google.com und recaptcha.net ausschlie\u00dfen k\u00f6nnte hier schon der 1. Schritt liegen<\/li>\n<li>Firefox RegelnFirefox hat eine Tracking Protection (about:preferences#privacy)<br \/>\nAuch hier kann einiges extrem \u201eangepasst\u201c werden<\/li>\n<li>FloodingWenn z.b. der Nutzer \u00fcber einen riesigen Proxy\/ privates VPN zugreift und reCaptcha zu oft aufgerufen wird und Google das aus Flooding-Schutz sperrt<\/li>\n<li>Javascript deaktiviertWenn das Endger\u00e4t z.b. auf seinem lokalen Ger\u00e4t Javascript deaktiviert hat kann das Nachladen von weitere Informationen (in diesem Falle das reCaptcha-Element) nicht nachgeladen werden w\u00fcrde<\/li>\n<\/ul>\n<h3>Firewallregeln f\u00fcr Outgoing Policys (https\/http Proxys)<\/h3>\n<p>(nur f\u00fcr den Fall das es das gesamte System betrifft und oder G\u00e4stenetz?)<\/p>\n<p>F\u00fcr IPv4 Adressen(*2):<br \/>\ndig -t TXT \\_netblocks.google.com<br \/>\ndig -t TXT \\_netblocks3.google.com<\/p>\n<p>davon ben\u00f6tigen wir diese Blocks (gilt nat\u00fcrlich nur bis sich das bei<br \/>\nGoogle \u00e4ndert):<\/p>\n<p>ip4:172.217.0.0\/19<br \/>\nip4:172.217.32.0\/20<br \/>\nip4:172.217.128.0\/19<br \/>\nip4:172.217.160.0\/20<br \/>\nip4:172.217.192.0\/19<br \/>\nip4:172.253.56.0\/21<br \/>\nip4:172.253.112.0\/20<br \/>\nip4:108.177.96.0\/19<br \/>\nip4:35.191.0.0\/16<br \/>\nip4:130.211.0.0\/22<br \/>\nip4:35.190.247.0\/24<br \/>\nip4:64.233.160.0\/19<br \/>\nip4:66.102.0.0\/20<br \/>\nip4:66.249.80.0\/20<br \/>\nip4:72.14.192.0\/18<br \/>\nip4:74.125.0.0\/16<br \/>\nip4:108.177.8.0\/21<br \/>\nip4:173.194.0.0\/16<br \/>\nip4:209.85.128.0\/17<br \/>\nip4:216.58.192.0\/19<br \/>\nip4:216.239.32.0\/19<\/p>\n<p>in eine Datei speichern. Diese Datei k\u00f6nnen sie dann mit der folgenden Anleitung importieren und regelm\u00e4\u00dfig auffrischen (runterscrollen zum Interaktiven Tutorial):<\/p>\n<blockquote class=\"wp-embedded-content\" data-secret=\"Y1Oer2gfqx\"><p><a href=\"https:\/\/www.boc.de\/watchguard-info-portal\/allgemeines\/microsoft-endpoints\/\">Microsoft Endpoints<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"&#8222;Microsoft Endpoints&#8220; &#8212; BOC IT-Security GmbH\" src=\"https:\/\/www.boc.de\/watchguard-info-portal\/allgemeines\/microsoft-endpoints\/embed\/#?secret=Y1Oer2gfqx\" data-secret=\"Y1Oer2gfqx\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\n<p>Allerdings schreibt google selbst (*1):<br \/>\n-&gt; but you should periodically check this, as these blocks may occasionally change.<br \/>\nRegelm\u00e4\u00dfige Updates sind also erforderlich<\/p>\n<p>(Quellen)<br \/>\n*1 https:\/\/code.google.com\/archive\/p\/recaptcha\/wikis\/FirewallsAndRecaptcha.wiki<br \/>\n*2 https:\/\/chronicler.tech\/firewall-considerations-for-google-recaptcha\/<\/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%2F2020%2F12%2Frecaptcha-und-firewalls%2F&subject=reCaptcha%20und%20Firewalls\" title=\"Per E-Mail versenden\" aria-label=\"Per E-Mail versenden\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; 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Wenn dieser Frontend-Part fehlt (durch eine Firewall oder andere Optionen) kann das Formular nicht erfolgreich abgesendet werden. Gr\u00fcnde hierf\u00fcr sind:<\/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%2F2020%2F12%2Frecaptcha-und-firewalls%2F&subject=reCaptcha%20und%20Firewalls\" title=\"Per E-Mail versenden\" aria-label=\"Per E-Mail versenden\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; background-color:#999; color:#fff\"><span class=\"shariff-icon\" style=\"\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 32 32\"><path fill=\"#999\" d=\"M32 12.7v14.2q0 1.2-0.8 2t-2 0.9h-26.3q-1.2 0-2-0.9t-0.8-2v-14.2q0.8 0.9 1.8 1.6 6.5 4.4 8.9 6.1 1 0.8 1.6 1.2t1.7 0.9 2 0.4h0.1q0.9 0 2-0.4t1.7-0.9 1.6-1.2q3-2.2 8.9-6.1 1-0.7 1.8-1.6zM32 7.4q0 1.4-0.9 2.7t-2.2 2.2q-6.7 4.7-8.4 5.8-0.2 0.1-0.7 0.5t-1 0.7-0.9 0.6-1.1 0.5-0.9 0.2h-0.1q-0.4 0-0.9-0.2t-1.1-0.5-0.9-0.6-1-0.7-0.7-0.5q-1.6-1.1-4.7-3.2t-3.6-2.6q-1.1-0.7-2.1-2t-1-2.5q0-1.4 0.7-2.3t2.1-0.9h26.3q1.2 0 2 0.8t0.9 2z\"\/><\/svg><\/span><span class=\"shariff-text\">E-Mail<\/span>&nbsp;<\/a><\/li><li class=\"shariff-button linkedin shariff-nocustomcolor\" style=\"background-color:#b32317\"><a href=\"https:\/\/www.linkedin.com\/sharing\/share-offsite\/?url=https%3A%2F%2Fwordpress.boc.de%2Fwatchguard-info-portal%2F2020%2F12%2Frecaptcha-und-firewalls%2F\" title=\"Bei LinkedIn teilen\" aria-label=\"Bei LinkedIn teilen\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; 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