p0t: 鍵認証に目を反らすなうーん・・・ パーミッションですが、$HOME/.sshだけでなく、 /や/homeや/home/USERNAMEが775だったりしてもダメなので、その確認をしたほうがいいかも 一度 StrictModes no でsshdを動かしてみるとか・・・
Posted by: Ryosuke | 2006年09月30日 03:58
Ryosukeさんの情報で鍵認証できない問題が解決しました。ありがとうございます!鍵認証に対する苦手意識が消えた!心理カウンセラーにも治せない俺の下らない悩みがどんどん解決していきます。
まとめときます。
手順:
ssh-keygen -t rsa
ssh komagata@komagata.no-ip.org "echo `cat ~/.ssh/id_rsa.pub` >> ~/.ssh/authorized_keys"
チェックするところ:
- RSAAuthentication yes、PubkeyAuthentication yes(普通はデフォルト)
- /.sshが700、./.ssh/authorized_keysが600
- /, /home, ~にgroup, other書き込み権限が無いこと(権限関連はStrictModes noで一応無視できる)
デフォルトですが、一応sshd_config載せときます。
# Package generated configuration file
# See the sshd(8) manpage for details
# What ports, IPs and protocols we listen for
Port 22
# Use these options to restrict which interfaces/protocols sshd will bind to
#ListenAddress ::
#ListenAddress 0.0.0.0
Protocol 2
# HostKeys for protocol version 2
HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_dsa_key
#Privilege Separation is turned on for security
UsePrivilegeSeparation yes
# Lifetime and size of ephemeral version 1 server key
KeyRegenerationInterval 3600
ServerKeyBits 768
# Logging
SyslogFacility AUTH
LogLevel INFO
# Authentication:
LoginGraceTime 120
PermitRootLogin no
StrictModes yes
RSAAuthentication yes
PubkeyAuthentication yes
#AuthorizedKeysFile %h/.ssh/authorized_keys
# Don't read the user's ~/.rhosts and ~/.shosts files
IgnoreRhosts yes
# For this to work you will also need host keys in /etc/ssh_known_hosts
RhostsRSAAuthentication no
# similar for protocol version 2
HostbasedAuthentication no
# Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication
#IgnoreUserKnownHosts yes
# To enable empty passwords, change to yes (NOT RECOMMENDED)
PermitEmptyPasswords no
# Change to yes to enable challenge-response passwords (beware issues with
# some PAM modules and threads)
ChallengeResponseAuthentication no
# Change to no to disable tunnelled clear text passwords
#PasswordAuthentication yes
# Kerberos options
#KerberosAuthentication no
#KerberosGetAFSToken no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes
X11Forwarding yes
X11DisplayOffset 10
PrintMotd no
PrintLastLog yes
KeepAlive yes
#UseLogin no
#MaxStartups 10:30:60
#Banner /etc/issue.net
# Allow client to pass locale environment variables
AcceptEnv LANG LC_*
Subsystem sftp /usr/lib/openssh/sftp-server
UsePAM yes