Please try reconnecting Colfax cluster using a different proxy other than Intel. You cannot connect to Colfax Cluster within Intel network.
If you still fail to login, please send me screen's of error message and ~/.ssh/config file.
Is the information shared above helpful to resolve your issue?
Ravi Keron N
Depending on your device...Mac or Linux etc...the following proxy should work. But it is best that you consult IT to get a secure method of doing this
ProxyCommand nc -X 5 -x proxy.jf.intel.com %h %p