{"id":6838,"date":"2014-04-23T08:11:28","date_gmt":"2014-04-23T08:11:28","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2014\/04\/23\/problem-about-icmpv6-collection-of-common-programming-errors\/"},"modified":"2014-04-23T08:11:28","modified_gmt":"2014-04-23T08:11:28","slug":"problem-about-icmpv6-collection-of-common-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2014\/04\/23\/problem-about-icmpv6-collection-of-common-programming-errors\/","title":{"rendered":"problem about icmpv6-Collection of common programming errors"},"content":{"rendered":"<ul>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/64c2e0055e05bf28a87ed9d52b444e39?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nRobert Tupelo-Schneck<br \/>\ntcp ipv6 icmpv6<br \/>\nI&#8217;m testing on IPv6. A is a server in a Cogent colo with native IPv6, call it 2001:db8:1111::1. B is a Mac mini behind an Airport Extreme router behind ISP Comcast; the router is set up to use anycast 6to4, and B is let&#8217;s say 2002:c000:202::2.On B, ssh 2001:db8:1111::1 works just fine.On A, ssh 2002:c000:202::2 times out. (Same for any other TCP connection.) Running tcpdump -nnvvvSs0 on B, I can see that the SYN packet from A reaches B just fine, but the SYN-ACK packet back from B to A is to<\/li>\n<\/ul>\n<p>Web site is in building<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Robert Tupelo-Schneck tcp ipv6 icmpv6 I&#8217;m testing on IPv6. A is a server in a Cogent colo with native IPv6, call it 2001:db8:1111::1. B is a Mac mini behind an Airport Extreme router behind ISP Comcast; the router is set up to use anycast 6to4, and B is let&#8217;s say 2002:c000:202::2.On B, ssh 2001:db8:1111::1 works [&hellip;]<\/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":[],"class_list":["post-6838","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/6838","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=6838"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/6838\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=6838"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=6838"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=6838"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}