{"id":4572,"date":"2015-05-09T07:19:57","date_gmt":"2015-05-09T05:19:57","guid":{"rendered":"https:\/\/www.bdjl.de\/localhost\/?p=4572"},"modified":"2015-05-09T07:26:39","modified_gmt":"2015-05-09T05:26:39","slug":"tunnelbau","status":"publish","type":"post","link":"https:\/\/www.bdjl.de\/localhost\/?p=4572","title":{"rendered":"Tunnelbau"},"content":{"rendered":"<p>Die <a href=\"http:\/\/omdistro.org\/\" target=\"_blank\">OMD<\/a> steht in der Schule hinter der Dom0, die f\u00fcr diesen Rechner gleichzeitig das Gateway ins Netz ist:<\/p>\n<pre class=\"lang:default decode:true\">cat \/proc\/sys\/net\/ipv4\/conf\/eth0\/forwarding \r\ncat \/proc\/sys\/net\/ipv4\/conf\/eth0\/forwarding<\/pre>\n<p>Die Ausgabe muss jeweils 1 lauten.<\/p>\n<p>Zwei iptables Regeln sorgen daf\u00fcr, dass die Ports und der Traffic zur OMD durchgereicht werden:<\/p>\n<pre class=\"lang:default decode:true\">iptables -t nat -A PREROUTING -p tcp -i eth0 --dport 9393 -j DNAT --to-destination 192.168.0.2:443\r\niptables -A FORWARD -p tcp -d 192.168.0.2 --dport 9393 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT\r\n<\/pre>\n<p>Ein Aufruf von <em>https:\/\/domnullundgateway.tld:9393\/checkmk\/<\/em> sorgt so daf\u00fcr, dass Anfragen an die OMD, die intern unter <em>https:\/\/192.168.0.2<\/em> zu erreichen ist, weiter geleitet werden.<\/p>\n<p>Damit man diese Regeln nicht immer wieder neu setzen muss, stehen sie in <em>\/etc\/network\/interfaces<\/em> am Ende der Konfiguration der Netzwerkkarte <em>eth0<\/em> jeweils nach einem <em>up<\/em>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Die OMD steht in der Schule hinter der Dom0, die f\u00fcr diesen Rechner gleichzeitig das Gateway ins Netz ist: cat \/proc\/sys\/net\/ipv4\/conf\/eth0\/forwarding cat \/proc\/sys\/net\/ipv4\/conf\/eth0\/forwarding Die Ausgabe muss jeweils 1 lauten. Zwei iptables Regeln sorgen daf\u00fcr, dass die Ports und der Traffic zur OMD durchgereicht werden: iptables -t nat -A PREROUTING -p tcp -i eth0 &#8211;dport 9393 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,10],"tags":[372,417],"class_list":["post-4572","post","type-post","status-publish","format-standard","hentry","category-linux","category-schule","tag-iptables","tag-tunnel"],"_links":{"self":[{"href":"https:\/\/www.bdjl.de\/localhost\/index.php?rest_route=\/wp\/v2\/posts\/4572","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bdjl.de\/localhost\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bdjl.de\/localhost\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bdjl.de\/localhost\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bdjl.de\/localhost\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4572"}],"version-history":[{"count":6,"href":"https:\/\/www.bdjl.de\/localhost\/index.php?rest_route=\/wp\/v2\/posts\/4572\/revisions"}],"predecessor-version":[{"id":4578,"href":"https:\/\/www.bdjl.de\/localhost\/index.php?rest_route=\/wp\/v2\/posts\/4572\/revisions\/4578"}],"wp:attachment":[{"href":"https:\/\/www.bdjl.de\/localhost\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4572"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bdjl.de\/localhost\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4572"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bdjl.de\/localhost\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4572"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}