Какая-то мистика. Есть два одинаковых сервера с Debian Lenny, весь софт на обоих последний (даже железо одинаковое, только рейд по-разному настроен). У обоих одинаковый sshd_config, сделанный чтобы можно было логиниться только через ключи:
# 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 yes
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 no
# Kerberos options
#KerberosAuthentication no
#KerberosGetAFSToken no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes
X11Forwarding no
X11DisplayOffset 10
PrintMotd no
PrintLastLog yes
TCPKeepAlive 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 no
На обоих у одного юзера имеется ~/.ssh/authorized_keys одинакого содержания и с одинаковыми правами доступа:
obey@host.velomania.ru /home/obey % ls -la | grep .ssh
drwx------ 2 obey obey 4096 2010-04-20 01:44 .ssh
obey@host.velomania.ru /home/obey % ls -l .ssh/authorized_keys
-rw-r--r-- 1 obey obey 394 2010-04-20 01:44 .ssh/authorized_keys
obey@host.e-art.ru /home/obey % ls -la | grep .ssh
drwx------ 2 obey obey 4096 Apr 20 04:01 .ssh
obey@host.e-art.ru /home/obey % ls -l .ssh/authorized_keys
-rw-r--r-- 1 obey obey 394 Mar 2 13:37 .ssh/authorized_keys
При попытке зайти на host.e-art.ru всё ок. Но при попытке зайти на host.velomania.ru говорит «Permission denied (publickey).».
Причём если делаю UsePAM yes, то оно работает. Есть идеи?