Free webmaster tools: instant tests
1.Non-secure Web Sites (HTTP)
2.Secure Web Sites (HTTPS)
3.Incoming Mail Server (POP3)
4.Outgoing Mail Server (SMTP)
5.FTP server
6.Network Device (Ping, ICMP)
7.DNS server
8.Port availability (Telnet)
9.Web Service (SOAP/HTTP)
10.User data protocol (UDP)
Free Webmaster Tools