Netstat command

UNIX for Advanced & Expert Users
1

Hi..,
Now, I am reading about the netstat command and its implementation. I have doubts in some options and its functionalities,

natstat - M (Which is described as display masqueraded connections), what it means?

What is Forwarding Information Base.?(--fib)

Thanks in advance,
Nagalenoj

2

Making an internet connection from inside a local network to the outside world via a NAT creates a masqueraded connection. All of the packets outside look like the router IP, all of the packets inside the local network have different IP's. The NAT translates the IP addresses back and forth as packets come and go.

FIB is a table of forwarding addresses. RFC 3222 (rfc3222) - Terminology for Forwarding Information Base (FIB) bas

3

what is NAT and masqueraded connections.

4

Please read out relevevnt document as per your OS variant!!!