如果你仍有旧的应用在Windows 2003上，对于SSL这已经是一个淘汰的操作系统了。它不支持TLS 1.1和1.2，更不要说TLS 1.3了，在SSL成为网站标配的今天，请务必升级操作系统。
SSL Protocol: These are the following list of protocols which have been released till date:
- SSL 1.0, 2.0 and 3.0
- TLS 1.0 (or SSL 3.1, released in 1999)
- TLS 1.1 (or SSL 3.2, released in 2006)
- TLS 1.2 (or SSL 3.3, released in 2008)
NOTE: Windows Server 2008 R2 and Windows 7 are the only 2 OS which support TLS 1.1 and TLS 1.2 in 2008. All the OS’s before this don’t support these 2 protocols.
