{"action":"created","issue":{"url":"https://api.github.com/repos/NixOS/nixpkgs/issues/5809","labels_url":"https://api.github.com/repos/NixOS/nixpkgs/issues/5809/labels{/name}","comments_url":"https://api.github.com/repos/NixOS/nixpkgs/issues/5809/comments","events_url":"https://api.github.com/repos/NixOS/nixpkgs/issues/5809/events","html_url":"https://github.com/NixOS/nixpkgs/issues/5809","id":54633568,"number":5809,"title":"ssh server secure configuration","user":{"login":"user318","id":671062,"avatar_url":"https://avatars.githubusercontent.com/u/671062?v=3","gravatar_id":"","url":"https://api.github.com/users/user318","html_url":"https://github.com/user318","followers_url":"https://api.github.com/users/user318/followers","following_url":"https://api.github.com/users/user318/following{/other_user}","gists_url":"https://api.github.com/users/user318/gists{/gist_id}","starred_url":"https://api.github.com/users/user318/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/user318/subscriptions","organizations_url":"https://api.github.com/users/user318/orgs","repos_url":"https://api.github.com/users/user318/repos","events_url":"https://api.github.com/users/user318/events{/privacy}","received_events_url":"https://api.github.com/users/user318/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":6,"created_at":"2015-01-16T22:35:09Z","updated_at":"2015-01-20T16:28:34Z","closed_at":null,"body":"Currently, by default only DSA and ECDSA host keys are generated for ssh server. But this schemes are considered less secure than RSA or ED25519.\r\nThis is good overview article:\r\nhttps://stribika.github.io/2015/01/04/secure-secure-shell.html\r\nPoints there are:\r\n* DSA have weak 1024-bit key\r\n* ECDSA is using suspicious curve\r\n\r\nThis is interesting too:\r\nhttp://security.stackexchange.com/questions/5096/rsa-vs-dsa-for-ssh-authentication-keys\r\nIt referes that DSA and ECDSA keys in some situation can lead to leakage of private key."},"comment":{"url":"https://api.github.com/repos/NixOS/nixpkgs/issues/comments/70683580","html_url":"https://github.com/NixOS/nixpkgs/issues/5809#issuecomment-70683580","issue_url":"https://api.github.com/repos/NixOS/nixpkgs/issues/5809","id":70683580,"user":{"login":"user318","id":671062,"avatar_url":"https://avatars.githubusercontent.com/u/671062?v=3","gravatar_id":"","url":"https://api.github.com/users/user318","html_url":"https://github.com/user318","followers_url":"https://api.github.com/users/user318/followers","following_url":"https://api.github.com/users/user318/following{/other_user}","gists_url":"https://api.github.com/users/user318/gists{/gist_id}","starred_url":"https://api.github.com/users/user318/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/user318/subscriptions","organizations_url":"https://api.github.com/users/user318/orgs","repos_url":"https://api.github.com/users/user318/repos","events_url":"https://api.github.com/users/user318/events{/privacy}","received_events_url":"https://api.github.com/users/user318/received_events","type":"User","site_admin":false},"created_at":"2015-01-20T16:28:34Z","updated_at":"2015-01-20T16:28:34Z","body":"> I've just created a PR for stronger DH prime moduli #5870\r\n\r\nI think ability to provide custom moduli file is more general approach."}}