Take the 2-minute tour ×
Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

My query is related to broadband network deployment. I have a DSL modem connection provided by my operator. Now the DSL modem has a built-in NAT and DHCP server, hence it allocates IP addresses to any client devices (laptops, PC, mobile) that connect to it. However, the DSL modem also gets a public IP address X that is provisioned by the operator.

My question is

  1. Whether this IP address X provisioned by operator is an IP address that is directly on the public Internet?

  2. Is it likely (practical scenario) that my broadband operator will put in one more NAT+DHCP server and provide IP addresses to all the modems within his broadband network. In this case, the IP addresses allotted to the modem devices will not be directly on the public Internet.

Thanks in advance.

share|improve this question

migrated from stackoverflow.com Apr 9 '10 at 15:55

This question came from our site for professional and enthusiast programmers.

    
You'll probably get a better answer if you post on Serverfault.com :) –  Mr Roys Apr 9 '10 at 14:16
    
Not a programming question –  Anonymous Apr 9 '10 at 14:27

1 Answer 1

I would normally expect your modem's outside address to be on the public internet. You might encounter multiple layers of NAT at a school, business, or other institution. There are a number of sites that will test your connection. One that comes to mind is ShieldsUp! at grc.com.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.