Communication over firewall Post: 38457

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Special Forums Cybersecurity Communication over firewall Post 38457 by protologic on Wednesday 16th of July 2003 04:43:27 PM

07-16-2003

Registered User

use SSH

SSH should be able to do what you are looking for, assuming you are using Xwindows as your graphical display environment on both ends.

Assuming the following:

systemA - the computer that has the application you want to run across the network

systemB - the computer you are "local" to, where you are connecting to systemA from.

Install the OpenSSH packages on both systemA and systemB (can be had from www.sunfreeware.com).

Make sure the /usr/local/etc/sshd_config file on systemA has the following line in it:

"
X11Forwarding yes
X11DisplayOffset 10
X11UseLocalhost yes
"

and be sure to restart sshd on systemA.

Make sure /usr/local/etc/ssh_config on systemB has the following:

"
Host *
ForwardX11 yes
"

Then ssh from systemB to systemA and run the following command:

echo $DISPLAY

You should see the following returned:

localhost:10.0

This means that a X11 session is forwarding through your ssh session, so you should be able to run an X11 application on systemA and have it display on your local systemB.

protologic

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LEARN ABOUT X11R4

sftp-server

sftp-server(1M)                                           System Administration Commands                                           sftp-server(1M)

NAME

       sftp-server - SFTP server subsystem

SYNOPSIS

       /usr/lib/ssh/sftp-server

DESCRIPTION

       sftp-server implements the server side of the SSH File Transfer Protocol as defined in the IETF draft-ietf-secsh-filexfer.

       sftp-server is a subsystem for sshd(1M) and must not be run directly. There are no options or config settings.

       To enable the sftp-server subsystem for sshd add the following to /etc/ssh/sshd_config:

       Subsystem   sftp     /usr/lib/ssh/sftp-server

       See sshd_config(4) for a description of the format and contents of that file.

       There is no relationship between the protocol used by sftp-server and the FTP protocol (RFC 959) provided by in.ftpd.

EXIT STATUS

       The following exit values are returned:

       0        Successful completion.

       >0       An error occurred.

FILES

       /usr/lib/sftp-server

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWsshdu                    |
       +-----------------------------+-----------------------------+
       |Interface Stability          |Evolving                     |
       +-----------------------------+-----------------------------+

SEE ALSO

       sftp(1), ssh(1), ssh-add(1), ssh-keygen(1), sshd(1M), sshd_config(4), attributes(5)

       To  view  license  terms,  attribution,  and  copyright  for OpenSSH, the default path is /var/sadm/pkg/SUNWsshdr/install/copyright. If the
       Solaris operating environment has been installed anywhere other than the default, modify the given path to access the file at the installed
       location.

AUTHOR

       Markus Friedl

SunOS 5.10                                                          30 Jul 2003                                                    sftp-server(1M)