Write an ACL similar to the one noted below and apply it outbound on the interface connecting to the MPLS network at the remote site. Alternatively, you could apply the ACL in the inward direction on the router at the main site.
Yes, it will. What this ACL will do is allow the 6 hosts to access the server and deny these hosts access to everything else on your network + allow all other hosts access to everything on your network. Someone mentioned creating 6 host entries which isn't needed as this ACL achieves the task in fewer entries and is the optimal configuration.
If there's one PC that wants to connect to your network then you can configure the interface with a 30-bit mask and enable network access. Make sure that subnet gets advertised to other routers in your domain either via a routing protocol or static route. As far as your second question is concerned, you cannot assign a overlapping address to another interface on the same router.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...