少なくとも2人のユーザー(ルートと自分)を持つリモートサーバーがあります。 2 つの $HOME フォルダーの .ssh/authorized_keys に同じキーがあります。 rootアカウントに接続できますが、私のアカウントでServer refused our key
エラーが発生します。エラーがないかどうかを確認するために、sshd_config(サーバー上)と.sshフォルダを確認しました。両方のアカウントに同じキーed25519を使用しているのでわかりません。私が見ることができる唯一のものはUsePAM yes
/etc/ssh/sshd_config.d/50-redhat.confですが、削除するとpasswdを使用してログインできません。
これはssh -vの結果です
[stan@DEL-3KC0G63 ~]$ ssh -v -i /mnt/c/Users/s.garret
/.ssh/id_ed25519 [email protected]
OpenSSH_8.0p1, OpenSSL 1.1.1k FIPS 25 Mar 2021
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Reading configuration data /etc/ssh/ssh_config.d/05-redhat.conf
debug1: Reading configuration data /etc/crypto-policies/back-ends/openssh.config
debug1: configuration requests final Match pass
debug1: re-parsing configuration
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Reading configuration data /etc/ssh/ssh_config.d/05-redhat.conf
debug1: Reading configuration data /etc/crypto-policies/back-ends/openssh.config
debug1: Connecting to 192.168.1.28 [192.168.1.28] port 22.
debug1: Connection established.
debug1: identity file /mnt/c/Users/s.garret/.ssh/id_ed25519 type 3
debug1: identity file /mnt/c/Users/s.garret/.ssh/id_ed25519-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.0
debug1: Remote protocol version 2.0, remote software version OpenSSH_9.0
debug1: match: OpenSSH_9.0 pat OpenSSH* compat 0x04000000
debug1: Authenticating to 192.168.1.28:22 as 'stan'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none
debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none
debug1: kex: curve25519-sha256 need=32 dh_need=32
debug1: kex: curve25519-sha256 need=32 dh_need=32
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:LjRh07mgxeC37wDufL2WmbYVYTY0tKHptZSSZGc1Q3U
debug1: Host '192.168.1.28' is known and matches the ECDSA host key.
debug1: Found key in /home/stan/.ssh/known_hosts:3
debug1: rekey out after 4294967296 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey in after 4294967296 blocks
debug1: Will attempt key: /mnt/c/Users/s.garret/.ssh/id_ed25519 ED25519 SHA256:DF1VjlJzo51HzV0TQgCcKnRCZXlhr9rCwiJuZBZzVZU explicit
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,[email protected],ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected]>
debug1: kex_input_ext_info: [email protected] (unrecognised)
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,gssapi-with-mic,password
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure. Minor code may provide more information
No Kerberos credentials available: Invalid UID in persistent keyring name
debug1: Unspecified GSS failure. Minor code may provide more information
No Kerberos credentials available: Invalid UID in persistent keyring name
debug1: Next authentication method: publickey
debug1: Offering public key: /mnt/c/Users/s.garret/.ssh/id_ed25519 ED25519 SHA256:DF1VjlJzo51HzV0TQgCcKnRCZXlhr9rCwiJuZBZzVZU explicit
debug1: Authentications that can continue: publickey,gssapi-with-mic,password
debug1: Next authentication method: password
[email protected]'s password:
debug1: Authentication succeeded (password).
そして、sshフォルダ内のls -laの結果は次のようになります。
[stan@metal ~]$ ls -la .ssh/
total 24
drwx------. 2 stan stan 4096 17 juil. 18:20 .
drwxrwxr-x. 53 stan stan 4096 17 juil. 18:38 ..
-rw-------. 1 stan stan 115 4 juil. 08:34 authorized_keys
-rw-------. 1 stan stan 2622 16 févr. 2020 id_rsa
-rw-------. 1 stan stan 582 16 févr. 2020 id_rsa.pub
-rw-------. 1 stan stan 1361 16 mai 18:33 known_hosts
[stan@metal ~]$
答え1
SSHにはセキュリティのためのいくつかのセキュリティ制限があります。 〜/.sshの下のすべての項目は大丈夫に見えますが、.sshディレクトリ出力の..によるls
と、stan $ HOMEは775 / rwxrwxr-xであまりにもオープンです。
stanで実行する場合:
chmod 700 $HOME
またはルートの場合:
chmod 700 ~stan
これでSSHが機能します。