{"id":218,"date":"2004-09-14T13:28:15","date_gmt":"2004-09-14T12:28:15","guid":{"rendered":"http:\/\/wp.devco.net\/?p=218"},"modified":"2009-10-09T17:16:07","modified_gmt":"2009-10-09T16:16:07","slug":"tcp_header_analysis","status":"publish","type":"post","link":"https:\/\/www.devco.net\/archives\/2004\/09\/14\/tcp_header_analysis.php","title":{"rendered":"TCP Header Analysis"},"content":{"rendered":"<p>I have been spending a lot of time looking at network dumps of <a href=\"http:\/\/www.smpp.org\/\">SMPP<\/a> traffic to assist in debugging some network issues.  I was a bit rusty on some of the finer details of all the various TCP packet headers and my reference was at home.  <a href=\"http:\/\/www.google.com\/\">Google<\/a> found an amazing resource on <a href=\"http:\/\/www.firewall.cx\/\">firewall.cx<\/a> titled <a href=\"http:\/\/www.firewall.cx\/tcp-analysis.php\">Anylising the TCP header<\/a>.<br \/>\nThe document spans 7 sections covering the following:<\/p>\n<blockquote><p>\nSection 1: Source &#038; Destination Port Number<br \/>\nSection 2: Sequence &#038; Acknowledgement Numbers<br \/>\nSection 3: Header Length<br \/>\nSection 4: TCP Flag Options<br \/>\nSection 5: Window Size, Checksum &#038; Urgent Pointer<br \/>\nSection 6: TCP Options<br \/>\nSection 7: Data\n<\/p><\/blockquote>\n<p>It is beautifully colorful and well written.  Something that can easily be passed on to someone who does not know a lot about networking or as a simple resource to just catch up on forgotten knowledge.<br \/>\n<a href=\"http:\/\/www.firewall.cx\/\">Firewall.cx<\/a> has huge amounts of very good documentation on it, well worth poking around in for networking people.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I have been spending a lot of time looking at network dumps of SMPP traffic to assist in debugging some network issues. I was a bit rusty on some of the finer details of all the various TCP packet headers and my reference was at home. Google found an amazing resource on firewall.cx titled Anylising [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","footnotes":""},"categories":[5],"tags":[26,33],"_links":{"self":[{"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/posts\/218"}],"collection":[{"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/comments?post=218"}],"version-history":[{"count":1,"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/posts\/218\/revisions"}],"predecessor-version":[{"id":764,"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/posts\/218\/revisions\/764"}],"wp:attachment":[{"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/media?parent=218"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/categories?post=218"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/tags?post=218"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}