There are a number of problems that can cause failures when connecting to the SDCC. Here are some things to look for and try in order to resolve your problem.

Private and Public Key Issues

• Have you uploaded your public key to the SDCC via the key file upload form (requires your Kerberos user name and password)?

How to use your SSH key pair to log into another remote machine.

SSH keys are a public/private key pair that allows login to an SSH daemon (sshd) without using a password. SSH keys are generated using the ssh-keygen program on Linux/Unix/ macOS/Cygwin, or with PuTTYgen on Windows.

Note: SSH keys are checked within the sshd program itself, thereby taking precedence over the other authentication methods.

The Department of Energy (DOE) mandates that all DOE facilities use two-factor authentication methods on all gateways into the facility that provides shell access. The SDCC gateways support SSH key login.

Gateway Machines

See our gateway information page for a list of gateways and complete details.

About the facility migration to the SDCC Kerberos5 realm, and the Identity, Policy, and Audit (IPA) management system for authentication and authorization

On December 11, 2018, at 10:00 AM EST, the SDCC/RACF moved our password-protected systems and services to a new, unified authentication system: IPA.  In order to access facility services, users will need to register a password in the new IPA authentication system if they have not done so already

Information about SFTP Gateways

Users should connect to sftp.sdcc.bnl.gov in order to access the SFTP gateways and transfer files. 

There are many graphical clients available, such as WinSCP and Cyberduck, that users can download and install. 

Information on the SSH Gateways at the SDCC

The SSH gateways at the SDCC are the primary "doors" into the SDCC facility. They are only to be used to gain access to the facility, and are not designed for data transfers or interactive sessions. Once you have logged into an SSH gateway, you can continue your connection through to another internal system via SSH. The legacy RHIC and US ATLAS SSH gateways have been deprecated and consolidated into the single set of SDCC SSH gateways.