Yes, I'll post back when I get more information. Probably harmless. I haven't had anymore attempts at communication to or from that source anyway.
My router is a linksys, and I wasn't able to find any sort of feature to have it e-mail logs to me. All I could do was view the most recent incoming and outgoing activity. It doesn't seem to actually keep them anywhere. That would be a great feature to have in a router, though. Next time I'm shopping around for one, I'll look for that as an option. I don't normally examine stuff quite so minutely, but times like this, when a question does come up, it's nice to be able to look into it anyway.