port 443

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is port 443 can be used for http url
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Commented:
443 is the standard port for http over TLS/SSL (https).

Why would you use it for other purposes?

http://en.wikipedia.org/wiki/Https

http://en.wikipedia.org/wiki/Transport_Layer_Security

wmp
Port 443 is generally used for https.
Technically any port can be used for a given application as long both the client and server use the same port.

Author

Commented:
HI Rick_O_Shay:,

I am little bit confused as you said : Technically any port can be used for a given application as long both the client and server use the same port.

I would like to understand if web application(Http) is interacting with application server then is this fone to use port 443.

If yes, how can i check the url with port 443 is open
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Commented:
By default http servers listen to unencrypted communication on port 80, and encrypted on port 443.

If you have telnet you can try the ports with
#> telnet <ip> 443
or
#>telnet <ip> 80

Author

Commented:
Thanks for explanation.
still not clear can 443 port can be used on http url?

what is encrypted/unencrypted  communication ? i am sorry not getting this.
Most Valuable Expert 2013
Top Expert 2013

Commented:
>> what is encrypted/unencrypted  communication  <<

Did you see the Wikipedia links I posted?

Author

Commented:
after seeing that i have post my question. please let me know following:

still not clear can 443 port can be used on http url?

what is encrypted/unencrypted  communication ? i am sorry not getting this.
When you type in a web address into a web browser (and assuming you don't overide the port numbers using a colon), your browser contacts the web server over either port 80 if the address starts http:// or port 443 if the address starts https://

The difference is that https is secure in the sense that the connection is authenticated and encrypted.
Web traffic sent unencrypted (ie http over port 80) can be 'sniffed' by a third party.  This third party is able to see all traffic between the client and the server.  This traffic might include sensitive data such as usernames and passwords.

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