topic Re: Who's using port 80 ? in Operating System - HP-UX

Who's using port 80 ?

Preet Dhillon — Wed, 17 Apr 2002 13:19:18 GMT

Dear Colleagues,

I'd like to know which processes (if any) are using port 80 on my HP-UX 11.00 server. I'm trying to start an Oracle service on this port and it's failing so I'd like to know if something else is already using port 80. Is there a way of telling ?

Many thanks and regards,
Preet

Re: Who's using port 80 ?

Robert Gamble — Wed, 17 Apr 2002 13:21:44 GMT

port 80 is the default port for web servers.
see /etc/services for variations.

More than likely someone is running a webserver on this server.

Re: Who's using port 80 ?

Domenico_5 — Wed, 17 Apr 2002 13:23:16 GMT

hi

use:

grep 80 /etc/services

it's http server

Re: Who's using port 80 ?

melvyn burnard — Wed, 17 Apr 2002 13:23:47 GMT

standard port for http
check /etc/services

Re: Who's using port 80 ?

Steven Gillard_2 — Wed, 17 Apr 2002 13:28:34 GMT

You can use the 'lsof' utility to find out the actual process thats using a port. Get it from:

http://hpux.connect.org.uk/hppd/hpux/Sysadmin/lsof-4.61/

Regards,
Steve

Re: Who's using port 80 ?

Preet Dhillon — Wed, 17 Apr 2002 14:08:33 GMT

Hi Steven ,

Many thanks for the link to lsof which I've downloaded and installed. The install of lsof includes a file called /otp/lsof/man/man8/lsof.8. Can you advise how to read this as a man page ?

Many thanks and regards,
Preet

Re: Who's using port 80 ?

Steven Gillard_2 — Wed, 17 Apr 2002 14:18:28 GMT

Just add it to your MANPATH:

# export MANPATH=$MANPATH:/opt/lsof/man
# man lsof

You should be able to get the information you want by running the following lsof command:

# lsof -i -n | grep 80 | grep LISTEN

Regards,
Steve

Re: Who's using port 80 ?

MANOJ SRIVASTAVA — Wed, 17 Apr 2002 14:19:00 GMT

Hi Preet

You can mv the man file under /usr/share/man/man.8/lsof.8 and the do a man lsof as this directory is the default man path. or you can do a man lsof under the sam directory to read it .

And for port 80 do a lsof | grep 80 to know who is using it.

Manoj Srivastava

Re: Who's using port 80 ?

harry d brown jr — Wed, 17 Apr 2002 14:19:35 GMT

export MANPATH=$MANPATH:/opt/lsof/man

man lsof

You probably want to add it to your profile.

live free or die
harry

Re: Who's using port 80 ?

pap — Wed, 17 Apr 2002 14:52:49 GMT

Hi,
Port 80 is by deault to be used by web services.

thanks,
-pap

Re: Who's using port 80 ?

John Bolene — Thu, 18 Apr 2002 13:16:11 GMT

Back on the path to man pages.

Make that page permanent for all users by adding the path to /etc/MANPATH

Another aside... If your ISP provider has banned use of a webserver on port 80 and blocked those packets, just switch it to another port such as 81. You will have to provide your users with the port number, since 80 is the assumed default.

Re: Who's using port 80 ?

hpuxrox — Thu, 18 Apr 2002 16:57:11 GMT

Been here before my friend, The best way to find out it to install lsof. If your companys policy doesnt alow you. You can try netstat -a and grep for port 80 to give you a clue.