What is different from the usual NAT "routing"?

What is the difference between NAT and a normal server which distributes IP addresses for my internal network?
March 19th 20 at 09:13
2 answers
March 19th 20 at 09:15
As between the NAT and DHCP.

NAT translates addresses that their DHCP gives out (and not only them).
and if there is say a full firewall on the router (the usual for example Tp-Link full for 20 bucks), that he called himself a firewall in there to fix the technology works, there is NAT? - ericka21 commented on March 19th 20 at 09:18
@ericka21, Firewall, NAT and DHCP are different technologies with different purpose.
But Yes, they often are even in cheap routers. - Delpha_Schumm commented on March 19th 20 at 09:21
March 19th 20 at 09:17
These are two completely different technologies. They go hand in hand, but no problem to use them separately.
DHCP without NAT — any domoset with "white" addresses, which automatically distributes them.
NAT no DHCP no problem to do it on an ordinary home router.

How does NAT. Take and adjust the outgoing package some of the parameters like outbound port (to find out whose package). At the same time change the outbound address to an external address network. When it comes to the answer, restore the original caller, change the incoming address to the address of that person and retranslates it to the internal network.

The task is simple routing (not NAT) — just pass the packet on down the chain by reducing TTL and defining a routing table in which connection it is necessary to pass it.
how thought NAT unlike Proxy does not adjust and does not filter anything? - ericka21 commented on March 19th 20 at 09:20
@ericka21,

NAT, as I've written, corrects the sender and a field (for example, the outgoing port) for outgoing packets and the destination and the incoming port for incoming.

Proks — it's all part of the application Protocol. NAT standardized in 1994, the conversion of the ARPANET to the Internet occurred a decade earlier, and then the protocols allowed to give the IP address of the gateway connected to the Internet and to the internal network. For HTTP, for example, the technology called "proxy server" for mail — servers "SMTP/POP", IRC, in principle, distributed technology. - ima75 commented on March 19th 20 at 09:23
@ericka21,
Of course, protocols that do not support the relay transmission of information, access to the Internet through a proxy server is impossible. Because some protocols (ICQ, P2P-BitTorrent part) allow you to wrap your packages in an HTTP, others (Subversion, communication with the tracker in BitTorrent) — HTTP-based. - ima75 commented on March 19th 20 at 09:26

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