In the first case, there is a dedicated address from the provider, it was easy to configure ipv6 with 6to4 Tunnel.
Local address: 195.18.17.86
Remote address: 193.0.203.203
And the inscription running is fine.
The second case is a PPTP link. There is a dedicated ip. PPTP configured, works. But when you turn on the 6to4 tunnel - it does not work (it does not turn on automatically). And any dances with settings, additional routers do not give anything.
How to connect the interface between the 6to4 Tunnel and PPTP Client interfaces correctly? In what order ? Who should be first? Or in parallel in one router? And how to do all this using Firewall NAT Mangle?
I ping from a working network on the second, for some reason I get looping.
$ traceroute 2a03:e2c0:bcc:5555::1 traceroute to 2a03:e2c0:bcc:5555::1 (2a03:e2c0:bcc:5555::1), 30 hops max, 80 byte packets 1 2a03:e2c0:bde:5555:: (2a03:e2c0:bde:5555::) 0.406 ms 0.375 ms 0.350 ms 2 2a03:e2c0:bde::1 (2a03:e2c0:bde::1) 30.270 ms 31.536 ms 31.194 ms 3 2a04:5200::1 (2a04:5200::1) 32.936 ms 32.912 ms 32.879 ms 4 2a03:e2c0:bde::1 (2a03:e2c0:bde::1) 32.832 ms 32.414 ms 31.312 ms 5 2a04:5200::1 (2a04:5200::1) 32.928 ms 32.738 ms 32.882 ms 6 * * * 