I am using EoIP over internet directly between two routers, I am not sure if this is a good practice. I set up an EoIP in each router at each end. The first one has the public remote address of the other router and vice versa.
The thing is, there is not any security setting in order to deny access from third routers trying to access one of my routers.
I have filtered 43(gre) protocol comming from unknown IPs, but with this rule I have blocked PPTP remote connection as well! because they also use 43(gre) protocol.
May be I have not understood the correct use of an EoIP interface.
Please I need your help.-
Thank you very much