How to resolve File Not Found in SharePoint 2013?

Dear EE experts,

We would like to ask for tech support on how to resolve the "File Not Found" error in our SharePoint 2013.
Here's the case, every time we access our SP site locally, it means if we access it using this site address: http://pm-server:2018/products/Gallery/Forms/Thumbnails.aspx
everything's fine, every pages are working properly and smoothly. But when we access this site using this address: http://58.137.29.120:2018/products/Gallery/Forms/Thumbnails.aspx    (that site address is for our external use), we encounter "File Not Found", "Sorry, something went wrong. File Not Found."

But if we access the site (for example, the Gallery) using the local address, of course it will show because it has no problem, then we go back to our external site, then access the Gallery again, or refresh the page, it will show no problem anymore... But how about to our clients who needs to access the external site, they can't fix it or they have no idea how to fix the problem that's why we must have the solution for this... and that's why we're asking for experts advise... :)

Thank you and hope to hear soon...
Stiebel EltronAsked:
Who is Participating?

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

x
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.

Kamlesh RaoIT ConsultantCommented:
Hello,

Your question seems to be a SharePoint Admin related topic.  SharePoint makes use of Alternate Access Mapping (AAM) concept, which gives you access to SharePoint Server via Internet / Intranet.

To help further we need to check your AAM Setting on the Central Administration site.  Take help of your admin and get further details.

You can read more on AAM at Microsoft Official Website here:

https://blogs.office.com/en-us/2010/08/16/what-every-sharepoint-administrator-needs-to-know-about-alternate-access-mappings-part-1-of-3/?eu=true

Thanks,
KR

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
Stiebel EltronAuthor Commented:
Thank you so much!!
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
Web Development

From novice to tech pro — start learning today.