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I'm struggling with some strange permission related behavior: when I configure nginx to listen to port 8080 everything works as expected, but when I use any other port I get something like

2014/01/10 09:20:02 [emerg] 30181#0: bind() to 0.0.0.0:8090 failed (13: Permission denied)

in /var/log/nginx/error.log

I have no clue where to look at so I don't really know what parts of the configuration might be interesting.

in nginx.conf nginx is configured to run as nginx:

user  nginx;

Also user nginx is in another group 'git'

in the site-config I tried to listen like this:

server {
    listen 8090; #does not work
    #listen 8080; #works
    #listen 9090; #does not work
    #listen 9090 default; #does not work neighter
    #listen 80; #works!
    server_name <some IP>;
    ...
}

I have only one more listener which serves port 443.

When I start some other service e.g. a SimpleHTTPServer on port 8090 etc. as non-root everything works fine:

$ python -m SimpleHTTPServer 8090
Serving HTTP on 0.0.0.0 port 8090 ...
localhost.localdomain - - [10/Jan/2014 09:34:19] "GET / HTTP/1.1" 200 -

What can the reasons be for denied permissions in general?

System is Fedora 18 ngnix is stock fedora 1.2.9

share|improve this question
    
First, you need to update to a supported version of Fedora. Second, try again. If it still fails, check /var/log/audit/audit.log. –  Michael Hampton Jan 10 at 8:43
    
This is not very helpful. Fedora 18 is still supported and even if it wasn't the linux permission system hasn't changed totally since then. –  frans Jan 10 at 9:03
    
Yes...for another four days. –  Michael Hampton Jan 10 at 10:36

1 Answer 1

up vote 5 down vote accepted

This will most likely be related to SELinux

semanage port -l | grep http_port_t
http_port_t                    tcp      80, 81, 443, 488, 8008, 8009, 8443, 9000

As you can see from the output above with SELinux in enforcing mode http is only allowed to bind to the listed ports. The solution is to add the ports you want to bind on to the list

semanage port -a -t http_port_t  -p tcp 8090

will add port 8090 to the list.

share|improve this answer
    
that's been it, thanks! But why is there so few information? I would guess other people use Fedora with SELinux, too.. –  frans Jan 10 at 9:06
    
@frans: There is plenty of information, you're just not aware of it or how to access and use it. If you have SELiux in enforcing or permissive mode then all denials are logged to /var/log/audit.log. There are tools available that allow you to filter, understand and manage the information and SELinux policy - have a look at the fedora seliux pages and the manpages for ausearch, audit2why, audit2allow. –  Iain Jan 10 at 9:19

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