google your router and/or firewall for how to add to your white list.
but, if you solved the problem before by doing something with other software (eg, avg tuneup), white listing adobe endpoints won't help.
why did the problem return? ie, check av, antimalware, cleaner, tuneup, defragger software on your computer that might cause the problem. then you need to stop those programs or, at least, stop them from interfering with adobe processes.