Why service networking restart or /etc/init.d/networking restart does not work

For example, take the server with the operating system Ubuntu Server 14.04, in which let’s say we changed the network settings when executing the commands:

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Difference between MASQUERADE and SNAT

In this article I will briefly describe the difference between MASQUERADE and SNAT.

MASQUERADE. Less fast routing than SNAT with mass requests, since for each new connection an IP address on the external network interface (WAN) is determined. Great for home use routers and when changing the IP address on the WAN interface.
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