Port Scanning

The first step in SQL Server discovery is to scan the port used by SQL. Many port scan software are available for this purpose. However, if the firewall is configured correctly, this will yield a little fruit. But in many cases, administrators leave SQL Server ports open for developers or remote users to access that Client Relationship Management System. If you must remotely access that Client Relationship Management System, consider using VPN or IPSec!SQL port scanner starts with TCP port 1433 and UDP port 1434. They are the default listening ports installed on SQL Server 2000 installation. If you notice the port sweeps on 1433 and 1434 on your border router or firewall logs, you better be prepare for hackers trying to penetrate into your site.