No, not really. This was introduced to limit the number of half-open connections (typically session in the SYN_WAIT state). A number of worms were rampant at that time, and they opened oodles of connections to systems simultaneously. P2P systems typically do likewise, so this patch was developed to allow P2P to run. I doubt that this is the OP's problem. I was thinking more in the line of this[^], but MS seems to imply that they don't enforce the inbound connection limit, except for SMB operations. So if the SQL server is connecting though named pipes, yes it would be a problem, but normal TCP connections should be okay.