Besides using NAT for accessing the internet with multiple machines using a single IP address, there are many other uses of NAT. One of them is to forward all traffic that is sent to a certain TCP port to another host. In practice, this technique can be used to test a service on a new host without adjusting anything on the client. The users or the clients do not need to be pointed to a new machine in order to test it. When the test would be unsuccessful, removing the NAT-rule is all it takes to switch back.
Few days ago I received a call from a friend who needed help figuring out why his laptop wasn’t connecting to his WiFi router after changing his password.
After quickly looking at the laptop, I asked him if something changed recently.. he replied that he just changed the WiFi password.
E|NSA – EC-Council
Network Security Administrator
The E|NSA program is designed to provide
fundamental skills needed to analyze the internal
and external security threats against a network,
and to develop security policies that will protect
an organization’s information.
The ss command is used to show socket statistics. It can display stats for PACKET sockets, TCP sockets, UDP sockets, DCCP sockets, RAW sockets, Unix domain sockets, and more. It allows showing information similar to netstat command. It can display more TCP and state information than other tools. It is a new, incredibly useful and faster (as compare to netstat) tool for tracking TCP connections and sockets. SS can provide information about: