Software updater stopped working

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http://forums.fedoraforum.org – All of a sudden the Software Updater on my FC7 box tells me that it can't get updates, because there's no internet connection. That's not the reason since I can browse the web just fine, and the Samba server is working fine. I thought it could be a configuration change on my router, but I don't see it. I am not sure what port the Software Updater wants to use. I Googled around, and searched these forums and tried a few things, but none have helped (or hurt). What now? Thanks, Bill (HowTos)