That looks like hacking port scans. This is pretty normal on the Internet, but your 10. addresses would indicate this is internal to your network? Did it just start? Is it scanning addresses sequentially? Is the source address always the same?
It could also be that somehting is trying to connect to a SQL database using named pipes and it is not set up to allow it.
It may be that someone has SQL Enterprise Manager installed and it is scanning for databases on your network.
Tom S
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