2007-01-25

sshをつかってて、たまになんでかわからないけどつながらないことがあります。

bash-2.05$ /usr/local/bin/ssh hoge@hogehoge ls
Permission denied (publickey,keyboard-interactive).

クライアント側のid_rsaと、サーバ側のauthorized_keysのペアも正しいし、何でだろう。ssh -v でログをだしてみても良くわからない。

bash-2.05$ /usr/local/bin/ssh  -v hoge@hogehoge ls
OpenSSH_4.4p1, OpenSSL 0.9.8d 28 Sep 2006
debug1: Reading configuration data /usr/local/etc/ssh_config
debug1: Connecting to hogehoge [192.168.10.1] port 22.
debug1: Connection established.
debug1: identity file /home1/hoge/.ssh/identity type -1
debug1: identity file /home1/hoge/.ssh/id_rsa type 1
debug1: identity file /home1/hoge/.ssh/id_dsa type -1
debug1: Remote protocol version 1.99, remote software version OpenSSH_4.4
debug1: match: OpenSSH_4.4 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.4
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'hogehoge' is known and matches the RSA host key.
debug1: Found key in /home1/hoge/.ssh/known_hosts:9
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Trying private key: /home1/hoge/.ssh/identity
debug1: Offering public key: /home1/hoge/.ssh/id_rsa
debug1: Authentications that can continue: publickey,keyboard-interactive
debug1: Trying private key: /home1/hoge/.ssh/id_dsa
debug1: Next authentication method: keyboard-interactive
debug1: Authentications that can continue: publickey,keyboard-interactive
debug1: No more authentication methods to try.
Permission denied (publickey,keyboard-interactive).

サーバ側でsshdをデバッグモードで動作させると一発で原因がわかりました。

bash-2.05# /usr/local/sbin/sshd -d
debug1: sshd version OpenSSH_4.4p1
debug1: private host key: #0 type 0 RSA1
debug1: read PEM private key done: type RSA
debug1: private host key: #1 type 1 RSA
debug1: read PEM private key done: type DSA
debug1: private host key: #2 type 2 DSA
debug1: rexec_argv[0]='/usr/local/sbin/sshd'
debug1: rexec_argv[1]='-d'
debug1: Bind to port 22 on ::.
Server listening on :: port 22.
debug1: Bind to port 22 on 0.0.0.0.
Server listening on 0.0.0.0 port 22.
Generating 768 bit RSA key.
RSA key generation complete.
(ここでクライアントから接続要求を出す。)
(中略)
Authentication refused: bad ownership or modes for directory /export/home/hoge
debug1: restore_uid: 0/1
(後略)

あー、ディレクトリのパーミションがまずいってことか。

rougeref’s diary

sshdのデバッグモード

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