What does ip nat inside source list 111 interface Dialer0 overload actually do

Can anyone fill me in on exactly what this ip nat statement actually does on my cisco 1721?

ip nat inside source list 111 interface Dialer0 overload

access-list 111 deny   ip any
access-list 111 permit ip any
access-list 111 permit ip any
access-list 111 permit ip any

Jo CoxICT ManagerAsked:
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.

Nayyar HH (CCIE RS)Network ArchitectCommented:
In basic terms, It will translate all your source addresses matched by the criteria in access-list 111 to the address of the dialer interface
Jo CoxICT ManagerAuthor Commented:
Does that mean
access-list 111 deny   ip any
will not get translated and thus its source address in the packet will remain as it was when originally sent from the device?

And the overload command, any particular meaning?
Nayyar HH (CCIE RS)Network ArchitectCommented:
yes that's right condition matching "access-list 111 deny   ip any" will not get translated and will be routed

The overload statement enables the router to use the ONE IP address on the dialer interface for MANY inside addresses

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
Jo CoxICT ManagerAuthor Commented:
No longer do I have to sit and stare thinking 'What' but can move on to other lines of code to think 'What' about.
Thank you
Nayyar HH (CCIE RS)Network ArchitectCommented:
Pleasure :-)
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.