Suppose you have a VPN server that routes traffic between several offices. It has tun0 with 192.168.0.1/24 linked to the New York office and tun1 with 192.168.1.1/24 linked to the London office.
The server also runs some service, say ssh, and you have a name for it in the DNS that resolves to one of its IP addresses. When you type "ssh vpn-server.example.com" it should work regardless of whether you're in New York or London, right?
If 192.168.0.42 can reach 192.168.1.42 by routing through the VPN server then it should generally also be able to reach 192.168.1.1 on the VPN server itself.
The server also runs some service, say ssh, and you have a name for it in the DNS that resolves to one of its IP addresses. When you type "ssh vpn-server.example.com" it should work regardless of whether you're in New York or London, right?
If 192.168.0.42 can reach 192.168.1.42 by routing through the VPN server then it should generally also be able to reach 192.168.1.1 on the VPN server itself.