How to find Port number of IP address?

Question

We can find out IP address of a domain name or URL. But how to find out Port number on which a domain name is hosted?

Answer 1

 domain = self.env['ir.config_parameter'].get_param('web.base.url')

I got the hostname and port number using this.

Answer 2

The port is usually fixed, for DNS it's 53.

Answer 3

If it is a normal then the port number is always 80 and may be written as http://www.somewhere.com:80 Though you don't need to specify it as :80 is the default of every web browser.

If the site chose to use something else then they are intending to hide from anything not sent by a "friendly" or linked to. Those ones usually show with https and their port number is unknown and decided by their admin.

If you choose to runn a port scanner trying every number nn from say 10000 to 30000 in https://something.somewhere.com:nn Then your isp or their antivirus will probably notice and disconnect you.

Answer 4

Use of the netstat -a command will give you a list of connections to your system/server where you are executing the command.

For example it will display as below, where 35070 is the port number

 TCP    10.144.0.159:**52121**    sd-s-fgh:35070   ESTABLISHED

Answer 5

Port numbers are defined by convention. HTTP servers generally listen on port 80, ssh servers listen on 22. But there are no requirements that they do.

Answer 6

DNS server usually have a standard of ports used. But if it's different, you could try nmap and do a port scan like so:

> nmap 127.0.0.1