The port of an IP?

Question

How do I find out the port of an IP? Is it the last bit in XXX.XXX.XXX.XX:XXXXX? after the ":"? :)

Thanks in advance

Answer 1

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

> nmap 127.0.0.1

HTTP servers generally listen on port 80, ssh servers listen on 22. But there are no requirements that they do.

http = 80, https = 443, ftp = 21

Answer 2

Yes, it is common to list the port a service on following the IP address and separating them with a colon ":".

Answer 3

Depends on what service you're trying to access. Provided the host didn't use a non-standard port (for regular services), you can look up the ports for commonly used protocols on the Web.



However, if you really don't know, you'll have to ask the person who's managing that server.

Answer 4

It would be the numbers after the colon ":" and the ports used on external connections are not always the same ports used on internal connections, routers can change them by using filters. Port 80 is http and is often blocked by ISP's