leased line - BT

Hi Guys,

I have just ordered a leased line for our business and I was asked by BT how many IP addresses I wanted. I asked the guy to explain what he meant and he went on a bit and then said that he thinks I would need 5.

Isn't a leased line in practice still just a internet connection entering a router? why would he need to know how many IP addresses I need. In addition to that, what IP addresses is he talking about?

can someone clarify this situation at all.

Best Regards
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Chris MillardCommented:
With a leased line, you can have multiple PUBLIC IP addresses. Unlike an ADSL line where your the WAN side of you router has a single public facing IP address, with a leased line all traffic passes through the BT equipment to you and you assign public facing IP addresses to your own equipment.

We have multiple IPs on our leased line. One IP is assigned to a firewall that serves a student network, another on a firewall that serves the staff network, another that serves our DMZ etc....

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Dave BaldwinFixer of ProblemsCommented:
At the very least, it's the external IP address of the router.  It's needed to make a connection.  Both my ADSL modem and my Cable modem have their own external IP addresses.  You can't make a connection without an IP address.
peggiegregAuthor Commented:
thanks this makes sense now
Bryant SchaperCommented:
Another use as well is an HA model, for example on two cisco routers that each get a public IP and then using HSRP they share a floating IP.  Firewalls do the same.   Plus you could host internal services accessible from the internet, like web, vpn, rdp.  You may assign them to another IP instead of port forwarding off the main IP.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.