Thanks. As a workaround, I installed Apache on my PC and manually edited my Windows hosts file to point back to myself (i.e. the files I manually found and downloaded) for
www.dailyphat.com and downloads.phathack.com (which appears to be the location for the unmodified firmware repository... and also doesn't work, FYI). Just for the record, I am using Kenwood firmware 13.01.
Question, though: when I edited my hosts file and started up DMS Tools, the list of available firmware was blank. I'm guessing DMS Tools reaches out to one of those sites for live firmware lists? In any case, I got around it by starting up DMS Tools with an empty hosts file, then changing the entries for those two sites and flushing my DNS cache.