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Off-campus Access DMZ

SSH access

To accommodate users logging in from other locations a new access portal,, is available for any user holding an active AHPCC account.

First Step

(You may skip this if located at UA or UAMS, or using their VPNs, since those addresses are pre-registered. Also those addresses which ARE-ON recognizes as research networks, including most university networks and Ozarks Go)

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 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 -p 2022
Last login: Tue Dec  7 16:58:10 2021 from

               Arkansas High Performance Computing Center
                       off-campus access portal

===========================================================================    <-  Open Ondemand Web Portal

   ssh        <-  Standard AHPCC login

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

Connection to closed.
[pawel@frontdesk ~]$

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

Second Step

[pawel@frontdesk ~]$ ssh 
Last login: Tue Dec  7 16:58:20 2021 from jumpbox-dmz


Once you have authenticated over port 2022 of, moving data using Secure CoPy (SCP) works exactly the same way over as it does directly over

pawel@frontdesk ~]$ scp data_set.tgz
data_set.tgz                                                                                                                                                        100%   51KB 311.2KB/s   00:00    
[pawel@frontdesk ~]$ 

Portal access

Open Ondemand Portal Access

The other popular method for accessing AHPCC resources is the Open Ondemand portal.


On-campus and UAF VPN users can access this service via the URL:

Off-Campus (Non-research/commodity network)

Others (off-campus) can access the Open Ondemand portal, by registering the client machine source IP, as described above. Once registered, the URL below, forwards the connection to the Open Ondemand portal.

off_campus_access_dmz.txt · Last modified: 2022/05/13 15:44 by root