{"id":1138,"date":"2021-02-16T10:56:35","date_gmt":"2021-02-16T15:56:35","guid":{"rendered":"https:\/\/increasec.com\/?p=1138"},"modified":"2021-02-16T10:56:35","modified_gmt":"2021-02-16T15:56:35","slug":"nat-slipstreaming-attack-on-firewalls-and-nat-routers","status":"publish","type":"post","link":"https:\/\/increasec.com\/?p=1138","title":{"rendered":"NAT Slipstreaming Attack on Firewalls and NAT routers"},"content":{"rendered":"\n<p>An attack has been demonstrated on Firewalls that have an H323 VoIP helper to trick it into connecting to any TCP port and not just the ports used by VoIP.<\/p>\n\n\n\n<p>Fortinet support says the H323 helper can be disabled <a href=\"https:\/\/kb.fortinet.com\/kb\/documentLink.do?externalID=FD48854\">thusly<\/a><\/p>\n\n\n\n<p>My current question to Fortigate support is if a firewall rule can filter connections to TCP1720 to only allow your VoIP provider  OR  if that will essentially disable VoIP due to its peer-to-peer nature.<\/p>\n\n\n\n<p>More into here <a href=\"https:\/\/portswigger.net\/daily-swig\/nat-slipstreaming-hack-tricks-firewalls-and-routers\">https:\/\/portswigger.net\/daily-swig\/nat-slipstreaming-hack-tricks-firewalls-and-routers<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>An attack has been demonstrated on Firewalls that have an H323 VoIP helper to trick it into connecting to any TCP port and not just the ports used by VoIP&#8230;.<\/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":[72,87,4,119,131],"class_list":["post-1138","post","type-post","status-publish","format-standard","hentry","category-uncategorised","tag-firewall","tag-fortigate","tag-security","tag-voip","tag-vulnerability"],"_links":{"self":[{"href":"https:\/\/increasec.com\/index.php?rest_route=\/wp\/v2\/posts\/1138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/increasec.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/increasec.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/increasec.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/increasec.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1138"}],"version-history":[{"count":1,"href":"https:\/\/increasec.com\/index.php?rest_route=\/wp\/v2\/posts\/1138\/revisions"}],"predecessor-version":[{"id":1139,"href":"https:\/\/increasec.com\/index.php?rest_route=\/wp\/v2\/posts\/1138\/revisions\/1139"}],"wp:attachment":[{"href":"https:\/\/increasec.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/increasec.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/increasec.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}