All language subtitles for 13. NAT

In our next section we're going to talk about not network address translation.

And let's go ahead with that over the network address translation is the method of remapping one IP

address space into another by modifying network address information in IP datagram packet headers while

they are in transit Ecorse air traffic routing device.

The main use of Natha is limit the number of public IP address.

As an organization our company must use for both more both for both economy and security purposes.

So why we need now because IPV for Edry space is limited.

So each device can not use a global address and private IPV for Edwards range is not surrounded by Internet

druthers.

So they need to be translated to global addresses.

Let's go with the private IP address range a private IP address is an IP address that is reserved for

internal use behind a rather or other not device.

Apart from the public private IP addresses are in contrast to public IP addresses which are public and

can not be used within the home or business network.

Sometimes a private IP address is also referred to a local IP address.

OK we Hello class A B C IP addresses as you can see and their strengths are the private IP address range

that we can use in our local area work.

Let's go with the net terminology in not terminology or some terms such as use side global For example

I'm sorry inside local which means your host type if for example if you are on PC Wan your inside local

IP is the IP address of the PC Wan.

Let's go to insert global Isold global address means your public IP address in this statement.

In this example our IP address inside IP addresses are converted to this public IP address.

So which means our inside global IP address is this and we're outside localized Piya this term which

means remerge host IP in the year the remote host is this and are outside localized P is this IP address

and outside globalise address is the removed public IP address which is this IP address for this example.

Let's go ahead.

The did not type.

So we have three types of the network colorist translation and they are static dynamic and the P-8 the

which is port address translation is static Nat metered private addresses are matched with global addresses

one to one.

For example if PC Wan will go to the Internet that's going to use these IP address.

PC too will serve on the Internet.

That's going to use this IP address and PC three will use this IP address in dynamic not permitted a

public IPV 4 pool is configured on our rather and IP addresses are assigned with first come first served.

For example if this guy wants to surf on the Internet he'll get this type address from this pool.

Secondly PCF 3 wants to surf on the Internet.

This guy will get this IP address and if PC too wants to surf too.

That's going to take this IP address that's going with the port address translation impact method each

IP each problem to address is translated to a single or a field a public IP address and port addresses

are used for choosing the right internal device.

When the packet is coming back in this method we have PC 1 2 and 3 as you know and all of these guys

have the private IP address of this this and this for HPC.

And we just have one public IP address and our private IP addresses.

All of them are being compared to a single IP address in part method.

Let's go ahead.

We do not call figuration to configure a static Nat.

We are tapping IP not inside source technique and we are typing our private and public IP addresses

that we want to convert.

Then we are getting into the interface mode of our rather and 4 gig 00 which looks to the internal side.

We are typing I Pinette inside command and we're typing I up outside comment for our geek 0 1 interface

which loops to the Internet side to her files.

They think not configuration we can show IP not translations commands.

And we can't check the inside local and the global IP addresses.

Let's go with the dynamic not configuration.

So we need to firstly define an IP address pool in here to define a pool and tapping IP in that pool.

The pools name which is network cable and I'm defining the range of the pool with the net mask keyword

and I'm typing the subnet mask that I'm going to use for the pool then I am creating an access list

and I'm permitting my internal network which begins with 10:41 one in here and I'm using with the proper

wildcard mask.

Then in the third step and typing I Pinet inside source sourceless the access list number with a pool

of our pools name them in the last step I'm getting into the interface's gig 00 and gigs are what and

I'm typing the IP not inside an IP not outside statements.

Here's the configuration of the Pat four parts configuration we are using the same similar logic with

the dynamic that we are creating poor again with I Pinette to pool name network cowpat and we're defining

the IP address range which are the same ones because I'm just going to use one IP address with this

mask.

Then I'm creating an IP X access list again which is defining my local area network OK.

The IP address is that I'm using are just starting with 10:41 one.

And this access list hits these first three bids and is the Stedman's threads starting with the 10:41

barn.

Right then I'm typing IP night inside sourceless a serial number pool.

My pool name

and I'm using an overload keyword.

OK.

That's the key difference.

Then I'm getting into the interface mode and I'm typing IPN that inside and outside statements again.

So let's take a look to the not for IP version 6.

Lastly I delusional 6 has a huge address space so there is no need for not for private public translation

not that is only used for communication.

But when I speak before and I through version 6 devices and this method is known as net sixty for.