SSH_TTY This is set to the allocated TTY if a PTY was used. The variables below are set for sessions as appropriate. ĭropbear sets the standard variables USER, LOGNAME, HOME, SHELL, PATH, and TERM. Per-user by creating a file ~/.hushlogin. dev/urandom random number source has a better chance of being securelyīy default the file /etc/motd will be printed for any login Location - keys will be generated after startup when the firstĬonnection is established. The -R option can be used to automatically generate keys in the default Host key files are of the form generated by dropbearkey. If the -r command line option is specified the default filesĪre not loaded. Host key files are read at startup from a standard location,īy default /etc/dropbear/dropbear_dss_host_key, Must only be writable by the user, otherwise Dropbear will not allow a The authorized_keys file and its containing ~/.ssh directory The -c command line option overrides this. Note that a user can still obtain most of the sameįunctionality with other means even if no-pty is set.Ĭommand=" forced_command" Disregard the command provided by the user and always runįorced_command. No-X11-forwarding Don't allow X11 forwarding for this connection No-agent-forwarding Don't allow agent forwarding for this connection No-port-forwarding Don't allow port forwarding for this connection Restrictions are comma separated, with double quotes around Though the restrictions are a subset (keys with unknown restrictions are This is the same format as used by OpenSSH, Īnd can be extracted from a Dropbear private host key with Each line is of the form ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAIgAsp. ~/.ssh/authorized_keys can be set up to allow remote login This also overrides any authorized_keys command= Unspecified the default is 10 (MAX_AUTH_TRIES) -c forced_command Disregard the command provided by the user and always runįorced_command. T max_authentication_attempts Set the number of authentication attempts allowed per connection. I idle_timeout Disconnect the session if no traffic is transmitted or received for Keepalives the connection will be closed. If no response is received for 3 consecutive The trade-off is that a session mayīe closed if there is a temporary lapse of network connectivity. Is useful for working around firewalls or routers that drop connectionsĪfter a certain period of inactivity. K timeout_seconds Ensure that traffic is transmitted at a certain interval in seconds. Improve network performance at the expense of memory use. W windowsize Specify the per-channel receive window buffer size. The default is /var/run/dropbear.pid -a Allow remote hosts to connect to forwarded ports. P pidfile Specify a pidfile to create when running as a daemon. Servers like inetd, tcpsvd, or tcpserver. Use this option to run dropbear under TCP/IP p port Listen on specified address and TCP port. m Don't display the message of the day on login. E Log to standard error rather than syslog. Is generated with dropbearkey(1) or automatically with the '-R' r hostkey Use the contents of the file hostkey for the SSH hostkey. Display the contents of the file banner before user port] DESCRIPTION ¶ dropbear is a small SSH server
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