Hi

i'm having two mikrotik that use the same dsl line. They are behind the ISPs Modem. When i make a vpn call from another network to theirs Public IP the call always ends at one (always the same) mikrotik. I want a specific WAN IP to make a VPN connection to the other Mikrotik. I didn't manage to setup the network to forward the call to the other mikrotik.

Any help will be appreciated

Do you have 2 public IP for that?

No only one.

And how do you expect to achieve this with only one Public IP?

Generally OP could construct a dst-nat rule on the "outer" routerboard with src-address=<specific WAN IP> which would forward VPN connection attempt to the "inner" routerboard (the rest of VPN connection attempts would land on the outer RB). That can be done for simpler protocols (e.g. ssh or http), I'm not sure about VPN.

I was wondering if there was a way to add a route in the ISP's Modem to do this

If ISP's modem is doing NAT for you, then "pig could fly" ... but more likely ISP's modem is in a "bridge mode" and only passes packets between ISP's access network and your routerboard.

I was wondering if there was a way to add a route in the ISP's Modem to do this

Which kind of VPN you are using

I was wondering if there was a way to add a route in the ISP's Modem to do this

Which kind of VPN you are using

PPTP

Is the ISP modem a router or a bridge. Can it be a bridge?