dropbear

NAME

dropbear − lightweight SSH2 server

SYNOPSIS

dropbear [−FEmwsgjki] [−b banner] [−d dsskey] [−r rsakey] [−p port]

DESCRIPTION

dropbear is a SSH 2 server designed to be small enough to be used in small memory environments, while still being functional and secure enough for general use.

OPTIONS

−b banner

bannerfile. Display the contents of the file banner before user login (default: none).

−d dsskey

dsskeyfile. Use the contents of the file dsskey for the dss host key (default: /etc/dropbear/dropbear_dss_host_key). This file is generated with dropbearkey(8).

−r rsakey

rsakeyfile. Use the contents of the file rsakey for the rsa host key (default: /etc/dropbear/dropbear_rsa_host_key). This file is generated with dropbearkey(8).

	−F		Don’t fork into background.
	−E		Log to standard error rather than syslog.
	−m		Don’t display the message of the day on login.
	−w		Disallow root logins.
	−s		Disable password logins.
	−g		Disable password logins for root.
	−j		Disable local port forwarding.
	−k		Disable remote port forwarding.

−p [address:]port

Listen on specified address and TCP port. If just a port is given listen on all addresses. up to 10 can be specified (default 22 if none specified).

−i

Service program mode. Use this option to run dropbear under TCP/IP servers like inetd, tcpsvd, or tcpserver. In program mode the −F option is implied, and −p options are ignored.

−P pidfile

Specify a pidfile to create when running as a daemon. If not specified, the default is /var/run/dropbear.pid

−a

Allow remote hosts to connect to forwarded ports.

−W windowsize

Specify the per-channel receive window buffer size. Increasing this may improve network performance at the expense of memory use. Use -h to see the default buffer size.

−K timeout_seconds

Ensure that traffic is transmitted at a certain interval in seconds. This is useful for working around firewalls or routers that drop connections after a certain period of inactivity. The trade-off is that a session may be closed if there is a temporary lapse of network connectivity. A setting if 0 disables keepalives.

AUTHOR

Matt Johnston (matt AT ucc DOT asn DOT au).
Gerrit Pape (pape AT smarden DOT org) wrote this manual page.