I just recently pointed the domain to the new website but the owner would like to access his old website for his data. The old website uses Magento while the new site uses Wordpress. The hosting for both websites are different. Can I access the old website through the IP address of the old hosting?
The old hosting suggested changing my hosts file, but it is not acceptable as the client would want to open both sites at the same time on the same browser
The website is also access from the temporary URL as well. So You need to do following things.
Get temporary URL from Cpanel.
Setup temporary URL for old website (magento) in core_config_data table.
Remove cache and try to access website with temporary URL in browser.