We help IT Professionals succeed at work.

Check out our new AWS podcast with Certified Expert, Phil Phillips! Listen to "How to Execute a Seamless AWS Migration" on EE or on your favorite podcast platform. Listen Now

x

General IP routing question

Curnies
Curnies asked
on
Medium Priority
568 Views
Last Modified: 2013-11-13
Firstly apologies if this is not the right group for this question but maybe someone can point me in the right direction.

My question is:

say for example and ISP assigns a static IP say 214.92.183.18 and I assign this to my mail server. Can somebody explain how mail is routed to me and why mail would not be routed to somebody somewhere else who assigns 214.92.183.18 to their router.

I understand the process of DNS and how a packet is routed to my ISP name server but how is my ISP nameserver aware of the MAC address of my router in order to route the packet to me?

Thanks in advance
Comment
Watch Question

Commented:
Unlock this solution and get a sample of our free trial.
(No credit card required)
UNLOCK SOLUTION
Top Expert 2004
Commented:
Unlock this solution and get a sample of our free trial.
(No credit card required)
UNLOCK SOLUTION

Author

Commented:
Thanks for the replies.

One question though. Say my connection is dialup isdn. What is there to prevent somebody else assinging my address to their router while my connection is down? There is no conflict in this case

More specifically I want to understand if the ISP routers maps traffic destined for my IP to the MAC address of my router what happens if my router crashes and has to be replaced - obviously the MAC address will change so how will DNS know that the new router with the new MAC is actually me?

Commented:
IF your ISP uses youe MAC address, you would have to tell them if you changed hardware.
Anyway if your ISP assigns you a static, they wouldn't let anyone else use it.  Usually on dial up, an ISP uses cli (Caller Line Identifier) and maps the IP to your telephone number.
Commented:
Unlock this solution and get a sample of our free trial.
(No credit card required)
UNLOCK SOLUTION
Unlock the solution to this question.
Thanks for using Experts Exchange.

Please provide your email to receive a sample view!

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.