{"id":491,"date":"2010-08-01T08:33:23","date_gmt":"2010-08-01T13:33:23","guid":{"rendered":"http:\/\/www.willhackforsushi.com\/?p=491"},"modified":"2010-08-01T08:37:30","modified_gmt":"2010-08-01T13:37:30","slug":"evading-ipsids-with-tcp-checksum-forgery","status":"publish","type":"post","link":"https:\/\/www.willhackforsushi.com\/?p=491","title":{"rendered":"Evading IPS\/IDS with TCP Checksum Forgery"},"content":{"rendered":"<p>Judy Novak, one of my early mentors and good friends, has posted an excellent article at packetstan.com on manipulating IPS\/IDS with TCP checksum forgeries. She also details the effect of this crafty manipulation to Snort with great examples you can use on your own IPS\/IDS.<\/p>\n<p><img decoding=\"async\" border=\"1\" width=\"450\" src=\"http:\/\/3.bp.blogspot.com\/_6T7xENEGPuM\/TFRk033dqsI\/AAAAAAAAAC4\/Ry9F-yzi7rY\/s1600\/bad-rst.gif\" alt=\"TCP Checksum Forgery Example\" \/><\/p>\n<p><a href=\"http:\/\/www.packetstan.com\/2010\/07\/potential-evasion-where-ips-fails-to.html\">Check out her article<\/a>, and also check out the <a href=\"http:\/\/www.sans.org\/network-security-2010\/description.php?tid=3712\">Scapy class she wrote for the SANS Institute<\/a>. If you want to be a packet ninja, mastering Scapy with Judy will get you there fast.<\/p>\n<p>-Josh <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Judy Novak, one of my early mentors and good friends, has posted an excellent article at packetstan.com on manipulating IPS\/IDS with TCP checksum forgeries. She also details the effect of this crafty manipulation to Snort with great examples you can &hellip; <a href=\"https:\/\/www.willhackforsushi.com\/?p=491\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,12],"tags":[],"class_list":["post-491","post","type-post","status-publish","format-standard","hentry","category-defending","category-hacking"],"_links":{"self":[{"href":"https:\/\/www.willhackforsushi.com\/index.php?rest_route=\/wp\/v2\/posts\/491","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.willhackforsushi.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.willhackforsushi.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.willhackforsushi.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.willhackforsushi.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=491"}],"version-history":[{"count":3,"href":"https:\/\/www.willhackforsushi.com\/index.php?rest_route=\/wp\/v2\/posts\/491\/revisions"}],"predecessor-version":[{"id":494,"href":"https:\/\/www.willhackforsushi.com\/index.php?rest_route=\/wp\/v2\/posts\/491\/revisions\/494"}],"wp:attachment":[{"href":"https:\/\/www.willhackforsushi.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=491"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.willhackforsushi.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=491"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.willhackforsushi.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=491"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}