hello gentlemen

i have the CCR1036 router and it is supposed to be insrtalled facing the public internet directly, i do not know how to do:

1- secure the Router CCR and configure a good firewall in it.
2- build a VPN server so i can access it and access to my network from any other network

apreciate your support

1. There are a lot of topics on firewalls here and in the general section. I recommend a search as it would be too lengthy to type it out here.

2. Are you wanting a point-to-point or something like and end user VPNing into your network? There are others as well...