STScI Logo

Hubble Space Telescope
How to Diagnose and Fix Communication Problems with APT

Depending on your institution's computer security measures (firewalls, blocked ports, etc.), you may initially have trouble while using APT. This could include:

Since it would be best to discover any communication problems well before the Phase I deadline, here are the steps to diagnose and fix communication problems. You or your system administrator can run this early on if you have any concerns about whether your institution's security measures might interfere with APT.