Connecting with SSH
SSH is an application that provides secure communication between two computers. Using SSH, you can connect to the Helix systems using the following Internet names:
Helix helix.nih.gov Biowulf biowulf.nih.gov
SSH for PCs
PuTTY is a free ssh client for Windows. See installation instructions at http://helix.nih.gov/Documentation/How_To_Connect/PuTTY/.
X-Win32 is X window software that includes PuTTY, an ssh client for Windows. It is available free to Helix users. For download/installation instructions, see http://helix.nih.gov/Documentation/How_To_Connect/X-Windows/xwin32.html
SSH for Macs
Mac OS X automatically includes ssh software. In a terminal window, type ssh helix.nih.gov to start an ssh session to Helix. If your username on your local system is different from your NIH domain username, you will need to type ssh email@example.com
The first time you connect to Helix, you will be asked about the RSA key fingerprint. After this, you will not be asked this question in future sessions. Sample session (user input in bold):[mymac:~] macuser% ssh firstname.lastname@example.org The authenticity of host 'helix.nih.gov (126.96.36.199)' can't be established. RSA key fingerprint is e9:87:ba:5b:4b:fd:ca:82:04:79:c1:60:b3:99:95:75. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'helix.nih.gov,188.8.131.52' (RSA) to the list of known hosts. Notice to Users This U.S. Government computer system is provided for authorized use only. Any and all uses of this system and all files on this system may be monitored, copied or disclosed by authorized personnel. The data on the system may be searched at the request of law enforcement or other persons, as appropriate, and may be disclosed and used for disciplinary or civil action or criminal prosecution. Use of this computer system constitutes consent to these policies, which may take precedence over privacy rights. email@example.com's password: enter your NIH domain password here Last login: Sun Feb 4 13:52:12 2007 from firstname.lastname@example.org You have new mail. Mon Feb 5 10:15:16 EST 2007 <helix>41%
SSH for Linux
Linux automatically includes SSH software. In a terminal window, type ssh email@example.com to start an ssh session to Helix, where username is your Helix (and NIH domain) username. A sample session will be exactly like the Mac session displayed above.
Connecting with X-windows emulation software
X-windows software allows users the ability to run graphics applications remotely & display their graphics locally. All Unix Workstations are capable of X-windows display by default, Mac/PC users will need to install an X-windows emulator. We provide free X-windows emulation software (Mac and PC) for helix users which can be found at http://helix.nih.gov/Documentation/How_To_Connect/X-Windows/.
To disconnect, type 'logout' at the prompt.
Other Ways to Connect
Information about the NIH VPN. Once the connection is set up, users should open an ssh connection to helix.nih.gov. A VPN account or other local login will be required to access NIH-limited resources such as Matlab, Mascot or to connect to Biowulf.