Hi @osmelbrito
Since you haven't specified which SAS platform version you are asking for (9.x, Viya), I will share my experience with 9.x, to be specific 9.4 Mx onwards. During the configuration phase, you can specify context root for some of the web applications. I have seen it with SAS VA, Studio etc.
If your environment is already installed and configured you can also create a simple reverse proxy change in the httpd.conf file of SAS Web Server and restart for the changes to take effect. You can also add this change to sas.conf file however during upgrades or hot-fixes it can be overwritten.
ProxyPass /NewPortal http://hostname:7980/SASPortal
ProxyPassReverse /NewPortal http://hostname:7980/SASPortal
Reference URL: https://httpd.apache.org/docs/2.4/mod/mod_proxy.html