How to bypass regex block of request?

How to bypass regex block of request?

I was asked the following question at a job interview recently:

You need to reach a web server at the IP address 20.21.22.23 via browser using HTTP. Browser checks the IP address and blocks requests to the IPs that match the regex ^http(s)?:\/\/20\.21\.22\.23$. How can you bypass the restriction and gain access to the web server? There are multiple correct answers.

Please help me figure out what the correct answers are.