{"title":"knockd","version":"1.0","type":"rich","author_name":"mrmt","blog_url":"https://blog.mrmt.net/","author_url":"https://blog.hatena.ne.jp/mrmt/","url":"https://blog.mrmt.net/entry/2004/04/15/010000","image_url":null,"published":"2004-04-15 01:00:00","provider_url":"https://hatena.blog","width":"100%","description":"knockd ethernet interface, looking for special \"knock\" sequences ofport-hits. A client makes these port-hits by sending a TCP (or UDP)packet to a port on the server. This port need not be open -- sinceknockd listens at the link-layer level, it sees all traffic even ifit's destined for a closed port.\u2026","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.mrmt.net%2Fentry%2F2004%2F04%2F15%2F010000\" title=\"knockd - \u306a\u3093\u304b:\u304b\u3093\u304c\u3048\u3066-6\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_title":"\u306a\u3093\u304b:\u304b\u3093\u304c\u3048\u3066-6","provider_name":"Hatena Blog","categories":[]}