GRE Tunnel Behind with one router behind NAT

RouterOS General
1

Hello guys.

I’m trying to do GRE tunnel between 2 branch office but just one it’s behind of NAT, anyone has a tutorial or know to do and can help me?

Thanks.

2

you have to use VPN PPTP is based on GRE+TCP

3



  1. Use a NAT aware tunnel, this could be PPTP although that is limited to a single tunnel and weak encryption. You may find SSTP or L2TP/IPSec more flexible. I don’t recommend OpenVPN in MikroTik as it’s not a compete implementation.
  2. You can avoid NAT all together by using IPv6. An IPv6 GRE tunnel can transport IPv4, IPv6 or both (dual-stack) without a problem.