/interface pptp-client
add connect-to=10.100.0.18 disabled=no name=pptp-out1 profile=default user=ppp2

/ip address
add address=10.0.0.6/30 interface=ether1 network=10.0.0.4
add address=10.0.0.14/30 interface=ether2 network=10.0.0.12

/ip firewall mangle
add action=mark-connection chain=prerouting connection-mark=no-mark disabled=yes in-interface=ether1 new-connection-mark=con-ISP1 passthrough=yes
add action=mark-connection chain=prerouting connection-mark=no-mark in-interface=ether2 new-connection-mark=con-ISP2 passthrough=yes
add action=mark-connection chain=output disabled=yes dst-port=1701 new-connection-mark=con-ISP1 passthrough=yes protocol=udp
add action=mark-connection chain=output connection-mark=no-mark dst-port=1723 new-connection-mark=con-ISP2 passthrough=yes protocol=tcp
add action=mark-connection chain=output connection-mark=con-ISP2 new-connection-mark=con-ISP2 passthrough=yes protocol=gre
add action=mark-routing chain=output connection-mark=con-ISP1 disabled=yes new-routing-mark=ISP1 passthrough=yes
add action=mark-routing chain=output connection-mark=con-ISP2 new-routing-mark=ISP2 passthrough=yes

/ip route
add distance=1 gateway=10.0.0.5 routing-mark=ISP1
add distance=1 gateway=10.0.0.13 pref-src=10.0.0.14 routing-mark=ISP2
add distance=254 gateway=ether1

## Если убрать этот маршрут, то тунель PPTP не строится.
## Сик вижу от 10.0.0.6 - думаю в этом причина. Если этот маршрут есть, то сик правильный от 10.0.0.14
add distance=1 dst-address=10.100.0.18/32 gateway=10.0.0.13