I would like to use site-to-site vpn tunnel. I set it up, connection established, but I cannot ping the remote lan. I tried both direction. My setup is based on this. Some moths ago I used ipsec tunnel with these routers, but then the Internet connection was not available for months on one site. After then, the network settings are changed. We have another ISP, another (but permanent) IP on both site. I adjusted the parameters for the new settings, but the vpn didn't work. I decided to reset the routers, and configure them from scratch. I used Routeros v5.27, so I upgraded to v6.28. With the new version and new settings, the tunnel established, but I cannot ping the remote site. I see on the remote router on the forward accept rule the packets matches, but don't come back (maybe don't arrive there?).
I tried the ping from client to client, and from router to router (with the router's local ip as souce) , but without success.