Solved

"These Two devices are natted" = What does that mean?

Posted on 2013-12-18
4
386 Views
Last Modified: 2013-12-22
What does it mean when two devices are natted?
I know that a router uses NAT to allow devices from outside the company to communicate to devices inside the company.  But I read a piece of documentation discussing two devices INSIDE of the company that are natted.  Why should two devices inside the company require NATTING?
0
Comment
Question by:brothertruffle880
  • 2
  • 2
4 Comments
 
LVL 44

Accepted Solution

by:
Darr247 earned 250 total points
ID: 39728310
Network Address Translation might need to occur anytime more than one subnet exists inside the company.

Even in the same computer, if Internet Connection Sharing is being used, NAT would occur between the 2 network adapters involved in the sharing.
0
 
LVL 11

Assisted Solution

by:Miftaul
Miftaul earned 250 total points
ID: 39728420
NAT is not required between the subnets if they are in private IP block RFC1318. As long as the routing is there, no NAT required.

NAT is required only when we have private IP and we want to communicate with the public internet IPs.

But in very few scenarios, NAT is done within the company subnets. Say you have a merger, your local internal subnet and the remote site internal subnet overlaps in a site to site connectivity.

eg, your office-a subnet 192.168.1.0/24 and office-B subnet 192.168.1.0/24 overlaps. You have to have NAT over VPN.
0
 
LVL 44

Assisted Solution

by:Darr247
Darr247 earned 250 total points
ID: 39730511
If you work for a large company that was on the networked bandwagon early, such as HP, GM or IBM, nearly all their internal (L2) switches/routers/et al have public IPs (HP had an entire /8 public IPv4 block the last I knew), but they also have lots of different private IP subnets inside various buildings/plants where NAT'ing happens.  That's why I said, *might* need to occur.  :)
0
 
LVL 11

Assisted Solution

by:Miftaul
Miftaul earned 250 total points
ID: 39731249
I agree with you. the word *might* flipped your whole sentence to me, my mistake.

But the possibility of internal NAT is very limited now a days.

The place I am with happens to use Public block of IPs for individual devices including workstations. We also have private block of IP 10.0.0.0 within the network, we hardly do NAT within LAN, rather solely use routing internally.

NAT is only done at the edge when traffic is destined for internet.
0

Featured Post

Highfive Gives IT Their Time Back

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

Suggested Solutions

AWS has developed and created its highly available global infrastructure allowing users to deploy and manage their estates all across the world through the use of the following geographical components   RegionsAvailability ZonesEdge Locations  Wh…
Security is one of the biggest concerns when moving and migrating your data from your on-premise location to the Public Cloud.  Where is your data? Who can access it? Will it be safe from accidental deletion?  All of these questions and more are imp…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

760 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

22 Experts available now in Live!

Get 1:1 Help Now