Linking between Web Servers

All,
Looking for more of a high-level answer than a detailed technical one. Is there a way to link a user logged into one web server to a completely independent web server, where the first web server has the credentials for the second web server, and those credentials should not be passed to the user's computer in any format?
Put another way, User is logged into Web Server 1. Web Server 1 has credentials (username/password) for the User on Web Server 2. Those credentials should not be passed to the User; however they are required to link the User into Web Server 2.
One solution is to have Web Server 1 make an API call to Web Server 2 with the credentials; have Web Server 2 issue temporary credentially that expire; and then pass these credentials to from Web Server 1 to the User.
I'm curious if there is another solution where Web Server 1 logs directly into Web Server 2, and then "proxies" Web Server 2's session back to the User. If so, is this easy to implement on Web Server 1? What is this called?
Thanks,
Kevin

Hi,
Quoted from
https://technet.microsoft.com/en-us/library/cc262849.aspx#ServiceApp :
You can change the protocol and port binding for each service application. On the Service Applications page in Central Administration, select the service application, and then click
Publish.
Here is an article for configuring Windows firewall port rules for SharePoint using PowerShell in case you need:
http://www.xylos.com/default.aspx?id=1050
Regards,
Rebecca Tu
TechNet Community Support
Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact
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