I don't think it was Snapz trying to to connect. The mil node looks like a
internal NTP server. This is what your mac would connect to when syncing
time if you were internal to that military branch. I see this as a mis configuration
rather then a threat. Check your time preferences and determine the server
you use to get time. Now, if you were running Windozs, I would have a different
answer, because UDP 123 IS an attack vector for some viruses.