Need to block port 1521 for all machines except one.

[~~~0Pen ~~~ S0uRce ~~~]

Hi Rohit

On Tue, Mar 31, 2009 at 1:16 PM, Rohit khaladkar
<rohit.khaladkar at gmail.com> wrote:
> Hi All,As a security measure, I need to block port 1521on the database
> server , which is used by Oracle for all machines, except one.I tried using
> the following commands to block the port, but for some reason it is not
> working.Can someone please help me.
>
>
> iptables -A INPUT -s $1 -p tcp --dport 1521 -j ACCEPT
> iptables -A INPUT -p tcp --dport 1521 -j DROP
>
> where $1 is the machine name or ip address of the machine which needs access
> to the port.

try with this rule
iptables -A INPUT -s ! $1 -p tcp --dport 1521 -j REJECT/DROP
this is an except rule ! except this machine all would be denied to
access 1521 port !!!

Just reply me back if this works for you


Thanks
Vijay
> --
> redhat-list mailing list
> unsubscribe mailto:redhat-list-request at redhat.com?subject=unsubscribe
> https://www.redhat.com/mailman/listinfo/redhat-list
>



-- 
~~~ 0Pen ~~~ S0uRce ~~~