How can I find the number of connections from a specific IP address historically?

I am using netstat -na command to find out the number of network connections from a specific machine, but this returns information as of now. His there anyway that I can find out this information from yesterday or earlier.

Thanks,
Tim

No, not using netstat.

That much I realised, would there be any log file that records this?

solaris doesn't log connections by default. you can enable it though.