Just noticed the original Argonne CA cert installed w/ AGTk2.4 has expired as of Jan 30th, 2008. I assume this doesn't affect many people; however our secondary AGTk2.4 server stopped accepting connections from anyone (including the bridgeserver) and thought I'd post a fix for anyone else running into the issue.
To solve the issue, I've exported the new Argonne CA cert and signing policy from a current AGTk3.1 install, then imported those into the AGTk2.4 install. Finally, I deleted the expired expired Argonne CA certs from AGTk2.4 Cheers, Todd