弁財天

ゴフマン「専門家を信じるのではなく、自分自身で考えて判断せよ」

~/.ssh/id_ed25519.pub

RHEL7.2の証明書認証のssh接続でトラぶる。

sshd: /etc/ssh/sshd_config line 54: Deprecated option RSAAuthentication
だよねーw。

stackoverflow.com→Unable to use password less login with ssh
公開キーを設置する方式がうまくいかないと思ったら$HOMEディレクトリのパーミッションをチェックしてるのだとか。 ここは変態システムなので譲れないw。

teketeke55.hatenablog.com→ssh鍵認証ログイン時のホームディレクトリパーミッション制限を緩める

/etc/ssh/sshd_configをメンテ。

#StrictModes yes
StrictModes no

#RSAAuthentication yes
PubkeyAuthentication yes

blog.n-z.jp→sshでed25519鍵を使うようにした
ついにECDSAが時代遅れにw。 RSAもDSAもECDSAも廃りED25519登場w。

#ssh-keygen -t ecdsa -b 384
ssh-keygen -t ed25519
ssh-copy-id -p xxxx -i ~/.ssh/id_ed25519.pub hoge@hoge
みたいな。

ssh -vvとか-vvvオプションで問題を判別する。

[hoge@hoge ~]$ ssh -vv -p ポート番号 リモートのユーザ@リモートホスト
OpenSSH_6.6.1, OpenSSL 1.0.1e-fips 11 Feb 2013
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 56: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to リモートホスト [リモートホスト] port ポート番号.
debug1: Connection established.
debug1: identity file /ヘンな場所/リモートのユーザ/.ssh/id_rsa type -1
debug1: identity file /ヘンな場所/リモートのユーザ/.ssh/id_rsa-cert type -1
debug1: identity file /ヘンな場所/リモートのユーザ/.ssh/id_dsa type -1
debug1: identity file /ヘンな場所/リモートのユーザ/.ssh/id_dsa-cert type -1
debug1: identity file /ヘンな場所/リモートのユーザ/.ssh/id_ecdsa type -1
debug1: identity file /ヘンな場所/リモートのユーザ/.ssh/id_ecdsa-cert type -1
debug1: identity file /ヘンな場所/リモートのユーザ/.ssh/id_ed25519 type 4
debug1: identity file /ヘンな場所/リモートのユーザ/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.6.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4
debug1: match: OpenSSH_7.4 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ssh-dss-cert-v01@openssh.com,ssh-rsa-cert-v00@openssh.com,ssh-dss-cert-v00@openssh.com,ssh-ed25519,ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: kex_parse_kexinit: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519
debug2: kex_parse_kexinit: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc,blowfish-cbc,cast128-cbc,3des-cbc
debug2: kex_parse_kexinit: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc,blowfish-cbc,cast128-cbc,3des-cbc
debug2: kex_parse_kexinit: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: kex_parse_kexinit: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: kex_parse_kexinit: none,zlib@openssh.com
debug2: kex_parse_kexinit: none,zlib@openssh.com
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_setup: setup hmac-sha1-etm@openssh.com
debug1: kex: server->client aes128-ctr hmac-sha1-etm@openssh.com none
debug2: mac_setup: setup hmac-sha1-etm@openssh.com
debug1: kex: client->server aes128-ctr hmac-sha1-etm@openssh.com none
debug1: kex: curve25519-sha256@libssh.org need=20 dh_need=20
debug1: kex: curve25519-sha256@libssh.org need=20 dh_need=20
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA サーバホスト鍵
debug1: Host '[リモートホスト]:ポート番号' is known and matches the ECDSA host key.
debug1: Found key in /ヘンな場所/リモートのユーザ/.ssh/known_hosts:1
debug1: ssh_ecdsa_verify: signature correct
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /ヘンな場所/リモートのユーザ/.ssh/id_rsa ((nil)),
debug2: key: /ヘンな場所/リモートのユーザ/.ssh/id_dsa ((nil)),
debug2: key: /ヘンな場所/リモートのユーザ/.ssh/id_ecdsa ((nil)),
debug2: key: /ヘンな場所/リモートのユーザ/.ssh/id_ed25519 (0x7fcd2cc96de0),
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
debug1: Next authentication method: gssapi-keyex
debug1: No valid Key exchange context
debug2: we did not send a packet, disable method
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available (default cache: KEYRING:persistent:522)

debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available (default cache: KEYRING:persistent:522)

debug2: we did not send a packet, disable method
debug1: Next authentication method: publickey
debug1: Trying private key: /ヘンな場所/リモートのユーザ/.ssh/id_rsa
debug1: Trying private key: /ヘンな場所/リモートのユーザ/.ssh/id_dsa
debug1: Trying private key: /ヘンな場所/リモートのユーザ/.ssh/id_ecdsa
debug1: Offering ED25519 public key: /ヘンな場所/リモートのユーザ/.ssh/id_ed25519
debug2: we sent a publickey packet, wait for reply
debug1: Server accepts key: pkalg ssh-ed25519 blen 51
debug2: input_userauth_pk_ok: fp ユーザ鍵
debug1: Authentication succeeded (publickey).
Authenticated to リモートホスト ([リモートホスト]:ポート番号).
debug1: channel 0: new [client-session]
debug2: channel 0: send open
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0
debug2: callback start
debug2: fd 3 setting TCP_NODELAY
debug2: client_session2_setup: id 0
debug2: channel 0: request pty-req confirm 1
debug1: Sending environment.
debug1: Sending env LANG = ja_JP.UTF-8
debug2: channel 0: request env confirm 0
debug2: channel 0: request shell confirm 1
debug2: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug2: channel_input_status_confirm: type 99 id 0
debug2: PTY allocation request accepted on channel 0
debug2: channel 0: rcvd adjust 2097152
debug2: channel_input_status_confirm: type 99 id 0
debug2: shell request accepted on channel 0
Last login: Mon Dec 11 15:55:08 2017 from IPアドレス
[リモートのユーザ@リモートホスト ~]$

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