NAT and internet confusion

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definition of the internet confuses my mind !!!!!!!!!

so ;

Have (the system that is called as network address translation)to be used only while
going to internet?


Anyway we do have not to show our private network to outside(if you ask me)
is this wrong?

Consequently i think we have to make this in use when we try to reach another branch
office.


Consider that i am in one of a branch office of a firm and i want to
connect to other branch office this firm , in this case , do i have to
use NAT ?

 

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I have answered your question on the other post as you have done it twice

 

thanks but i know the things you told me

 

Most of this is answered in Network+... should we type all the answers to these questions, or should you take your new-found self-sufficiency and go pick up a Network+ study guide?

 

huh? have i read this before?

 

Yep... it's another of Kobem's double posts that he's been asked not to do.

 

No - NAT can be used anywhere - not just on the Internet.

You *cannot* show your private address on the internet. Most internet routers are set to drop such addresses.

I don't understand what you are saying here. The connection to the 'branch office' will depend on the addressing used.

Depends on how the network has been configured.

Harry.

 

sorry i used English so bad there and trying asking same things with a different view


1- we have to protect our private address not just going to Internet ? also we have to do this
connecting from a branch office to another branch office?) (for example connecting from New York
to Los Angeles office of a firm)


2- It is generally known NAT is used for providing hosts exiting to Internet , is this wrong?

3- Every time i exit from my local LAN to a public area(not only Internet , a WAN connection to another
branch office) should i use NAT?

 

Maybe a few NAT tutorial links would help (and all I did was get on Google and search for "network address translation tutorial"):

http://www.cisco.com/warp/public/556/nat-cisco.shtml

http://www.pcsupportadvisor.com/Network_address_translation_NAT_page1.htm

http://security.maruhn.com/iptables-tutorial/c3163.html

 

i had examined lots of links but something breaks my mind down!

think i am a host then i want to reach another one(host) in another network.
packet has exited from me and came to router , will my private address be translated that time?


i mean all time i want to leave my local network , will my private address be translated?

 

As has been previously pointed out, Not necessarily. It depends on how you have set your network up. you can use NAT over your WAN if you want, but you dont have to. WAN links, as far as im aware are usually similar to VPN connections between the offices.

Certainly at my old work, we didnt use NAT between offices, and we dont do that here. Think about it, how on earth is a support tech in Aberdeen going to be able to connect remotely to a machine in London if NAT is taking place? All I'd be able to connect to would be the router in their office. You cant use NAT if you intend for that kind of thing to happen, and most companies use centralised IT support of some kind.

 

hey mate , nearly understood the fact , maybe firewall is used for aberdeen between london telnet
event.


but like i said before , description of Internet is a bit complicated and from aberdeen to london
is an Internet too

another thing NAT is used to hide your private address while going Internet
and in your example NAT is useless

this is too bad mate!

 

Not useless, just useless over the WAN links. Think of WAN links as secured connections between the two sites. The routers at either end accept incoming transmissions from the other as if it were part of the internal network. The networks will have other routers for allowing access to the internet at large, and those will employ NAT.

These WAN links dont NEED to have firewalls in place between them, because they are secured links between the sites. Just as VPN is an encrypted, secure 'tunnel' across the internet. They probably will have a firewall, but its not necessary. It doesnt sound like you fully understand the function of a firewall though, since whether a firewall is used or not has no bearing on what you asked.

I have to echo earlier sentiments here Kobem. These concepts are fairly basic networking concepts. Im no networking guru, and my understandings of these concepts are basic level and simplistic, but they still seem to outweigh yours. If this is the avenue you are pursuing, then you REALLY need to go back to basics and work up. What you appear to believe you understand, you obviously dont.

 

maybe this is simple to you but it comes hard to me although i finished CCNA.
i try just thinking and thinking on these most of the time my brain stops and weird questions
begin occurring .

every time my brain stops , i come back to things i have learned . However , after a while
same thing happens . how can i overcome this problem ?

 

I dont really know what to say to that really. I've been one of your biggest advocates on these forums for letting you ask your questions unhindered, but you seem to be going over the same ground again and again without getting to grips with it. I would suggest possibly seeking out alternative texts (such as the previously mentioned N+ texts) on the subjects and reading them.

Are all the texts you are reading on these topics in english? It could just be that the language barrier is making your grasping of these concepts difficult, I would suggest getting texts in your own language to supplement your learning in these topics if thats the case.

 

Kobem,

Have you completed a CCNA course?
How did you find it?
Did you take the exam?
Do you feel that you have learnt from the exam?
How was the material and what material did you use?
Did you do the CCNA in University?

Answer would be exteremly grateful..

 

just course! there are computer programming and network courses in my country
but if you think about network you only find about cisco!


i didn't get the exam because WAN wasn't told us well so that i didn't take it.
not in university !

 

did you learn anything from the course? or was it too advanced for you...

 

I am not being funny but I think you need to relearn and start with the basics i.e N+

You seem to think you know stuff but you seem very confused about the whole thing to be honest.

 

I learned many things even 2 months later to improve myself and for being better than that
i continued to study . Also by asking my friend from my school and my course
tried to solve my confusions .

He helped me about some topics though his lifestyle was different from me , contact has been
interrupted later.

And i maintained it by myself. I have to succeed this up to understand and become an expert!
one of the reasons for persisting on that is to fail software !

then i headed for network side

1- i liked it
2- obligation of not to achieve software


To live in the world i have to be successful at least in one field. I have to earn money
because of some certain reasons , i couldn't have a job . One of them is that the military
service.

I am son of the two teachers and we have problems about money , my parents
can not get retired because of me . In addition i have a sister going to high school

i am 23 years old , no girlfriend didn't pass in my life until now . I couldn't touch a
girl and no kissing , do you understand these ?

besides , our regimen is under attack especially by managers and this irritates me too much
and this bothers me , i am afraid ! our land is about to become like malaysia the fake islam
country my sister is in danger . If these damn managers (the government) ends secularism
they change the regimen completely , fascism will come.