{"id":1894,"date":"2011-12-01T22:18:06","date_gmt":"2011-12-02T04:18:06","guid":{"rendered":"http:\/\/bucktownbell.com\/?p=1894"},"modified":"2011-12-01T22:18:06","modified_gmt":"2011-12-02T04:18:06","slug":"linux-the-hole-trick-to-bypass-firewall-restriction","status":"publish","type":"post","link":"http:\/\/bucktownbell.com\/?p=1894","title":{"rendered":"Linux: The hole trick to bypass firewall restriction"},"content":{"rendered":"<p><a href=\"http:\/\/www.cyberciti.biz\/tips\/howto-linux-iptables-bypass-firewall-restriction.html\">Linux: The hole trick to bypass firewall restriction<\/a>.<\/p>\n<blockquote><p>As long as remote is behaving itself, it will send back a &#8220;port unreachable&#8221; response via ICMP &#8211; however this is of no consequence. On the second attempt<br \/>\n<code>remote# echo \"hello\" | nc -p 53 -u local-fw 14141<\/code><br \/>\nThe netcat listener on console local\/1 then coughs up a &#8220;hello&#8221; &#8211; the UDP packet from outside has passed through the firewall and arrived at the computer behind it.<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>Linux: The hole trick to bypass firewall restriction. As long as remote is behaving itself, it will send back a &#8220;port unreachable&#8221; response via ICMP &#8211; however this is of no consequence. On the second attempt remote# echo &#8220;hello&#8221; | &hellip; <a href=\"http:\/\/bucktownbell.com\/?p=1894\">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":[110],"tags":[238,61,101],"class_list":["post-1894","post","type-post","status-publish","format-standard","hentry","category-networking","tag-firewall","tag-linux","tag-security"],"_links":{"self":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts\/1894","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1894"}],"version-history":[{"count":1,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts\/1894\/revisions"}],"predecessor-version":[{"id":1895,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts\/1894\/revisions\/1895"}],"wp:attachment":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1894"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1894"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1894"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}