Use Gre Tunnel Interface as Gateway For Another Router For a Specific IP

[Arash Barakizade]

Hi everyone,

i have configured a Gre tunnel between a mikrotik router and a C870 Cisco router,i have configured the access list in cisco and routing in mikrotik as well.

the situation is i want to grant access to a specific ip address (like google.com) for my Local network which is 192.168.x.y through Gre tunnel (15.15.15.0/30) so that i could access google through cisco's public ip address.

the gre tunnel on cisco has access to google right now and from local network i can ping cisco's gre tunnel and the trace for that specific ip address is now like this

*LAN Edge Device

*Mikrotik

*Cisco's GRE Tunnel Interface
*Cisco Gre Tunnel Interface Unreachable!

when i ping from gre int i can access that ip,but not from local network.

any ideas?

[Sergey Lisitsin]

Hi Arash,

Your topology is not exactly clear. Why do you have 2 GRE tunnels on your Cisco device? Can you provide a diagram of your setup?

[a.alekseev]

on your Mikrotik router:

1. enable nat  for that ip 

2. place a route for that ip through the tunnel

or you can do NAT on Cisco router.

[nurbol555]

Hi

Try to configure on mikrotik Firewall roles, and check connect between mikrotik and cisco, you have to see from mikrotik P2P address to cisco

Rate if it's help