Don't have routers password, need to open ports

Hello, I've taken over a customer's entire network. I need to open a port on their router/firewall, however the previous IT manager didn't leave the username and password. So I'm not sure of exactly what ports are currently open and to where they are routed. Before doing a hard reset to the default settings, is there a way internally to test which ports are open and to where they are routed. This way, after I do the hard reset, I can reopen the previously open ports so the customer doesn't experience any issues. Or if anyone has other ideas, I'd be open for suggestions. Thanks.
bhodge10Asked:
Who is Participating?
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.

James HIT DirectorCommented:
What brand of router/firewall is this? With Cisco equipment you can reset the password without having to reset the device back to factory.
0
bhodge10Author Commented:
@Spartan, well that would be too easy if I knew the Brand and model. I guess I'll need to go to their office tonight.
0
Garry GlendownConsulting and Network/Security SpecialistCommented:
Many/most password recovery methods require physical access to the device, I doubt you'll be able to do much from a distance ...
0
What were the top attacks of Q1 2018?

The Threat Lab team analyzes data from WatchGuard’s Firebox Feed, internal and partner threat intelligence, and a research honeynet, to provide insightful analysis about the top threats on the Internet. Check out our Q1 2018 report for smart, practical security advice today!

BawerCommented:
u need to do CEH Certified Ethical Hacker before doing anything with their network lolz,
0
skrgaCommented:
Nmap (port scanner) is great tool for discovering open ports NMAP_LINK, it haw linux and win bynaries.. If you know router/firewall model, maybe previous admin leave default username/password for device http://www.routerpasswords.com/..
0

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
bhodge10Author Commented:
closing
0
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
Hardware Firewalls

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.