To accommodate users logging in from other locations a new access portal, hpc-portal2.hpc.uark.edu, is available for any user holding an active AHPCC account. This service, upon successful login, registers the source IP address of user's client machine and adds that IP to the list of allowed IP's allowed to pass network traffic to the AHPCC login nodes.

To use the service ssh into port 2022 of hpc-portal2.hpc.uark.edu. After a successful login that session will be terminated and you will then be able to login to the same host with normal ssh (port 22, which is the default ssh port so does not need to be specified), and you will be forwarded to one of the pinnacle login nodes.

[pawel@frontdesk ~]$ ssh testuser@hpc-portal2.hpc.uark.edu -p 2022
Password: 
Last login: Tue Dec  7 16:58:10 2021 from 75.205.5.185

               Arkansas High Performance Computing Center
                       off-campus access portal

===========================================================================
   ssh hpc-portal2.hpc.uark.edu        <-  Standard AHPCC login

   Access allowed from 75.205.5.185 until Wed Dec  8 06:02:43 CST 2021
===========================================================================

Connection to hpc-portal2.hpc.uark.edu closed.
[pawel@frontdesk ~]$

At this point the source IP address (example 75.205.5.185) is registered and will remain in the allow list for the next 12 hours. An SSH session directly to hpc-portal2.hpc.uark.edu will forward the connection to a Pinnacle login node.

[pawel@frontdesk ~]$ ssh testuser@hpc-portal2.hpc.uark.edu 
Password: 
Last login: Tue Dec  7 16:58:20 2021 from jumpbox-dmz
pinnacle-l12:testuser:~$ 

pinnacle-portal can't be forwarded the same way. We are working on getting the host certificates we need for a portal.