iptables command

This is very common scenario. You want to permit access to a remote machine only by SSH. You would like to block all incoming traffic to your system except ssh connection under Linux.


There are a few ways to set up a Linux machine as route. Here is a relatively straight forward and common method. This method requires that the system use iptables for Network Address Translation (NAT). This step by step small howto will help you to setup Linux router only in 2 minutes. Configuration steps => […]


BIND is the Berkeley Internet Name Domain, DNS server. It is wildly used on UNIX and Linux like oses. You can use following tools to troubleshoot bind related problems under UNIX or Linux oses. Task: Port 53 open and listing requests By default BIND listen DNS queries on port 53. So make sure port 53 […]