Home / server / Questions / 248851
Accepted
Joey BagODonuts
Asked: 2011-03-18 19:24:21 +0800 CST

IPtables block port 8080 but not for localhost

  • 772

Currently I have an application that is running on 8080 front-ended by mod_proxy.

    <Location /hudson>
            Order allow,deny
            Allow from all
            ProxyPass http://localhost:8080/hudson
            ProxyPassReverse http://localhost:8080/hudson
    </Location>

I need to block TCP 8080 but not for the localhost how can this be done with IPtables?

hudson mod-proxy

3 Answers

  1. This would work:

    iptables -A INPUT ! -s 127.0.0.1 -p tcp -m tcp --dport 8080 -j DROP
    • 15
  2. Best Answer

    You could try the following:

    // accept all tcp on port 8080 from localhost  
iptables -I INPUT 1 -i lo -p tcp --dport 8080 -j ACCEPT  

[...] all your other rules  
// drop all other packets  
iptables -A INPUT -j DROP

    If you wanted to allow also 1 (or more) external/other IP you can use this: 

    // accept tcp on port 8080 from allowed_ip  
iptables -I INPUT 3 -i eth0 -p tcp --dport 8080 -s allowed_ip -j ACCEPT

    Let me know how it goes :)

    • 7

  3. Another approach: in server listening 8080, bind only to localhost: For apache it looks like following:

    Listen 127.0.0.1:8080
<VirtualHost 127.0.0.1:8080>
...
</VirtualHost>
    • 1