#!/bin/sh # # Post-installation script # # Copyright 2013 Guilhem Moulin # # Licensed under the GNU GPL version 3 or higher. set -ue find /home/ -mindepth 1 -maxdepth 1 -type d -print0 | xargs -r0 chmod og-rwx user="$(sed -rn '0,/^([^:]*):[^:]*:1000:.*/s//\1/p' /etc/passwd)" home="$(sed -rn '0,/^[^:]*:[^:]*:1000:[^:]*:[^:]*:([^:]*):.*/s//\1/p' /etc/passwd)" test -d "$home/.ssh" || mkdir -m 0700 "$home/.ssh" # TODO: make something more generic cp /cdrom/preseed/authorized_keys "$home/.ssh/authorized_keys" chown -R "$user:$user" "$home/.ssh" chmod -R og-rwx "$home/.ssh" # Delete the automatically generated keys, and replace by our own rm /etc/ssh/ssh_host_*_key /etc/ssh/ssh_host_*_key.pub ssh-keygen -b 4096 -t rsa -N '' -C /etc/ssh/ssh_host_rsa_key -f /etc/ssh/ssh_host_rsa_key cat > /etc/ssh/sshd_config << EOF # 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 #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 DenyUsers * 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 # Set this to 'yes' to enable PAM authentication, account processing, # and session processing. If this is enabled, PAM authentication will # be allowed through the ChallengeResponseAuthentication and # PasswordAuthentication. Depending on your PAM configuration, # PAM authentication via ChallengeResponseAuthentication may bypass # the setting of "PermitRootLogin without-password". # If you just want the PAM account and session checks to run without # PAM authentication, then enable this but set PasswordAuthentication # and ChallengeResponseAuthentication to 'no'. UsePAM no EOF # TODO: the full list hangs #apt-get autoremove --purge \ # dictionaries-common \ # eject \ # ispell \ # laptop-detect \ # nano \ # tasksel \ # wamerican \ # wbritish \ #|| true sudo update-alternatives --set editor /usr/bin/vim.nox # TODO: initramfs