{"id":2034,"date":"2021-03-16T09:27:00","date_gmt":"2021-03-16T08:27:00","guid":{"rendered":"https:\/\/www.dirk-hagedorn.de\/?p=2034"},"modified":"2021-11-09T18:42:35","modified_gmt":"2021-11-09T17:42:35","slug":"kurztipp-no-matching-key-exchange-method-found","status":"publish","type":"post","link":"https:\/\/www.dirk-hagedorn.de\/?p=2034","title":{"rendered":"Kurztipp: no matching key exchange method found"},"content":{"rendered":"<p>Noch eine kleine Begleiterscheinung die nach dem Upgrade auf Ubuntu 20.04 aufgetreten ist: Ein SSH zu einer VM mit einem Uralt-SCO-Unix scheitert mit folgender Fehlermeldung:<\/p>\n<pre>\r\n$ ssh vmsco\r\nUnable to negotiate with 192.168.47.11 port 22: no matching key exchange method found. Their offer: diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1\r\n<\/pre>\n<p>Abhilfe: F\u00fcr den Host und seine IP-Adresse die alten, mittlerweile als unsicher erachteten Verbindungsparameter aktivieren, die Ubuntu per Default nicht mehr verwendet:<\/p>\n<pre>\r\n$ sudo vi \/etc\/ssh\/ssh_config.d\/vmsco.conf\r\n\r\nHost vmsco\r\n  KexAlgorithms +diffie-hellman-group1-sha1\r\n  Ciphers +aes128-cbc\r\n\r\nHost 192.168.47.11\r\n  KexAlgorithms +diffie-hellman-group1-sha1\r\n  Ciphers +aes128-cbc\r\n<\/pre>\n<p><strong>Links:<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/man.openbsd.org\/ssh_config\" rel=\"noopener\" target=\"_blank\">ssh_config im OpenSSH Manual<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Noch eine kleine Begleiterscheinung die nach dem Upgrade auf Ubuntu 20.04 aufgetreten ist: Ein SSH zu einer VM mit einem Uralt-SCO-Unix scheitert mit folgender Fehlermeldung: $ ssh vmsco Unable to negotiate with 192.168.47.11 port 22: no matching key exchange method found. Their offer: diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1 Abhilfe: F\u00fcr den Host und seine IP-Adresse die alten, mittlerweile als <a class=\"more-link\" href=\"https:\/\/www.dirk-hagedorn.de\/?p=2034\">Weiterlesen\u00a0\u2026<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[316,22],"tags":[431,318,432,185],"class_list":["post-2034","post","type-post","status-publish","format-standard","hentry","category-kurztipp","category-linux","tag-sha1","tag-ssh","tag-ssh_config","tag-ubuntu"],"_links":{"self":[{"href":"https:\/\/www.dirk-hagedorn.de\/index.php?rest_route=\/wp\/v2\/posts\/2034","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dirk-hagedorn.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dirk-hagedorn.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dirk-hagedorn.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dirk-hagedorn.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2034"}],"version-history":[{"count":2,"href":"https:\/\/www.dirk-hagedorn.de\/index.php?rest_route=\/wp\/v2\/posts\/2034\/revisions"}],"predecessor-version":[{"id":2036,"href":"https:\/\/www.dirk-hagedorn.de\/index.php?rest_route=\/wp\/v2\/posts\/2034\/revisions\/2036"}],"wp:attachment":[{"href":"https:\/\/www.dirk-hagedorn.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2034"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dirk-hagedorn.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2034"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dirk-hagedorn.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2034"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}