HTTPS is a secure version of the HTTP protocol. Aside from the initial
connection and setup, HTTPS and HTTP are basically the same. The difference
lies in the initial setup between client and server. HTTPS uses the Secure
Socket Layer (SSL) protocol. SSL was created to secure credit card purchases
over the Internet. It requires that both sides of a connection be authenticated
and that data be encrypted and decrypted. It uses port 443 to initiate a secure
connection.
HTTP connectivity can be tested using any Telnet application
that allows a port number to be specified by Telnetting to the IP address of
the destination server using port 80.
- If the connection failed, a message will display stating that the Telnet
application could not open a connection to the host on port 80.
- If the connection was successful, a hello message may be displayed or a
Telnet window will open, but there will be no response. This indicates HTTP
connectivity to the server. To have the Web server respond, type GET /
HTTP/1.0, then press the enter key twice.
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NOTE:
By default characters are not echoed in MS Telnet upon successful
connection to a Web Server unless 'local echo' is enabled in the
preferences.
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The following table presents commands that can be used to
troubleshoot a World Wide Web network application.
