gtlsshd - Server for shell over TLS
The gtlsshd program receives connections from gtlssh,
authenticates the connections, and connects them to a shell or a program as
requested.
gtlsshd will listen on both SCTP and TCP sockets unless
told otherwise.
gtlsshd uses openssl public key certificate authentication
both directions. When something connections, it uses standard SSL handling
to validate itself to the user with the given key and certificate files.
On SSL does its job, it then runs an authentication protocol for
the user on top of the SSL connection. The user sends the username, and
gtlsshd will use the $HOME/.gtlssh/allowed_certs directory to authenticate a
certificate the user presents. If the user doesn't have a certificate that
matches the presented certificate, gtlsshd will attempt a normal
password login if that is enabled.
- -p|--port port
- Use the given port instead of the default port.
- -h|--keyfile file
- Use the given file for the key instead of the default. Defaults to
/etc/gtlssh/gtlsshd.key.
- -c|--certfile file
- Set the certificate to use. Defaults to /etc/gtlssh/gtlsshd.crt.
- --permit-root
- Allow root logins. Otherwise root or uid=0 is denied.
- --allow-password
- Allow password logins. By default only certificate-based logins are
allowed. Passwords are much less secure than certificate logins, so their
use is discouraged.
- --oneshot
- Do not fork the program at the beginning or when a connection is received.
This allows easier debugging of the program.
- --nodaemon
- Do not daemonize (double fork) the program.
- --nosctp
- Disable SCTP support.
- --notcp
- Disable TCP support
- --other_acc
<accepter>
- Enable the given accepter to receive connections for gtlsshd. This does
not disable TCP or SCTP.
- -P|--pidfile file
- Create a standard pidfile using the given filename.
- -4
- Do IPv4 only.
- -6
- Do IPv6 only. -d|--debug Generate debugging output. Specifying more
than once increases the output. This also causes syslog output to go to
standard error.
- -h|--help
- Help output
Corey Minyard <minyard@acm.org>