How can I open port 80?

Question

I'm new in Ubuntu, and I'm trying to open port 80. I have already set my router in order to do so, and I also set ufw.

Status: active

     To                         Action      From

[ 1] 22/tcp                     ALLOW IN    Anywhere
[ 2] 80/tcp                     ALLOW IN    Anywhere
[ 3] 22/tcp (v6)                ALLOW IN    Anywhere (v6)
[ 4] 80/tcp (v6)                ALLOW IN    Anywhere (v6)

But when I check localhost with Nmap, Port 80 is still closed.

What am I doing wrong?

Solution

nmap shows open ports if the server is listening on that port on the interface scanned. As you can see from the netstat output, no process is listening on port 80.

Comments

[muru]

Is there anything actually listening on port 80? A webserver like apache or nginx? Post the output of sudo netstat -lpn | grep :80

[Pepe]

Nope, it is just my computer. This is what I get with that command: tcp 0 0 127.0.0.1:8099 0.0.0.0:* LISTEN 3761/spotify

[Pepe]

So I have my port 80 open, but because there isn't any process there is not an aswer to netstat or nmap to determine is open, am i right?

[muru]

@Pepe yes, indeed. netstat uses different methods.

[Pepe]

I dont know, if I have to open new topic but what can i do to run some webpage just in my network? Thanks a lot for the fast replies!

[muru]

@Pepe Check out the LTS server guide: help.ubuntu.com/lts/serverguide/web-servers.html, in particular the sections on Apache and PHP, and if you have problems, then you could ask new questions.