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I have a Linux Mint Virtual Machine which I use quite a lot with my Windows host. I have lots of Software installed there (mostly with web GUI so I can access them from host easily).
So I am wondering instead of securing individual applications (by adding username/password, limit incoming request from host IP), can I just add a firewall which will limit incoming requests only from host IP? Will it be safe?
Using either the Windows (host) firewall or the guest OS firewall to do that is not recommended.
All VM tools already provide that kind of control. Have a look at the different types of networking available. You want a host-only network. By design that can only be used between the host and the VM, it is never accessible outside the host.
I should also have said that if you also need some services to reach outside the host, you can have both by setting up 2 networks and binding your web services to the host-only network.
