Kerio ServerFirewall is a Windows server firewall designed to protect both Windows operating systems and all commercial server applications such as Microsoft Exchange, Microsoft SQL Server, Oracle database, Kerio MailServer etc. including custom made server programs. It helps enterprises of all sizes protect their Windows Server operating systems from malicious attacks coming from the outside as well as from within their corporate networks. Its policy-based system prevents intrusions passed as legitimate traffic and protects against zero-day attacks that exploit vulnerabilities in the operating systems and applications running on them.