I did not ask you to curl anything, that was @Chetan_Tiwary_ . But, you have misunderstood what they were asking. Chetan did not ask you if you can curl your own host, they asked if you can curl the registry server.
Again, setting up a httpd (with firewall rules) on your RedHat workstation is not relevant to this situation. The problem with your VM is one of simple networking.
> " I manually set it to make sure all the parameters in setting the network were included,
> that I learnt from the course, and it seems to work after a reboot – that’s all."
You cannot simply take settings that worked in the RedHat training labs and apply them to your own VM, while hoping they will work. Your VM on your VMWare Fusion has a different network configuration, than the VM in the RedHat training labs.
> " I have not done this before, so I don’t really know what you mean or what I need to do here."
In order for your RedHat VM on your Mac to have network access, it needs a number of things. 1) The VM needs to have a virtual network card (which it does!), 2) the virtual network card must be connected to your Mac's network (either in bridged mode or in NAT mode), 3) your VM must be configured to use the network settings that apply to the environment from step 2.
If your VM is configured to provide networking via NAT, you must set your RedHat VM to use DHCP. If your VM is configured to provide networking via bridge mode, then you must first figure out what the network you are on requires: does it need hard-coded settings or DHCP?
If you cannot work with these instructions and guidance, then I suggest you first learn a bit more about TCP/IP networking in general. You need to understand how virtual machines and hypervisors work with network access.
Once the networking setup is correct, the following three will work.
After that, you can retry the podman login.
