As you have asked about the web portal of the internet banking of the Union Bank of India, I am giving you information about it, check below for the details

Web portal:
unionbankonline.co.in/




Here you will find the following

Retail User Login
Corporate User Login
Self User Creation
Forgot/Reset Password
Register for Mobile
Banking

Click on Retail User Login
Click on Continue to Login, the page open look like



Here enter the
User ID
Password
You will be able to login to the internet banking.