Below is a list of the the ways to resolve issues with connecting the HPC clusters, listed in order from the fastest to slowest way to have your issue resolved.
Unlock Duo
If you are locked out of the high performance computing clusters (Helium or Neon) due to Duo Security as a result of too many incorrect passcodeattempts, please unlock your Duo Security by going to the following page.
...
Chat: go to this website and click chat: http://its.uiowa.edu/contact
Contacting the HPC Sysadminsteam:
If the ITS Help Desk is unable to assist you they will escalate you to the HPC team. You can also contact the HPC team directly at hpc-sysadmins@iowa.uiowa.edu