Direct Secure Shell (SSH) access to AHPCC login nodes is only allowed from:
To accommodate users logging in from other locations a new access portal,
hpc-portal.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-portal.uark.edu.
[pawel@frontdesk ~]$ ssh email@example.com -p 2022 Password: Last login: Tue Dec 7 16:58:10 2021 from 188.8.131.52 Arkansas High Performance Computing Center off-campus access portal =========================================================================== https://hpc-portal.uark.edu <- Open Ondemand Web Portal ssh hpc-portal.uark.edu <- Standard AHPCC login Access allowed from 184.108.40.206 until Wed Dec 8 06:02:43 CST 2021 =========================================================================== Connection to hpc-portal.uark.edu closed. [pawel@frontdesk ~]$
At this point the source IP address
220.127.116.11 is registered and will remain in the allow list for the next 12 hours. An SSH session directly to hpc-portal.uark.edu will forward the connection to a Pinnacle login node.
[pawel@frontdesk ~]$ ssh firstname.lastname@example.org Password: Last login: Tue Dec 7 16:58:20 2021 from jumpbox pinnacle-l7:testuser:~$
Once you have authenticated over port 2022 of hpc-portal.uark.edu, moving data using Secure CoPy (SCP) works exactly the same way over hpc-portal.uark.edu as it does directly over pinnacle.uark.edu:
pawel@frontdesk ~]$ scp data_set.tgz email@example.com: Password: data_set.tgz 100% 51KB 311.2KB/s 00:00 [pawel@frontdesk ~]$
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:
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.