> > block in on ppp0 proto udp all
> >
> > pass in quick on ppp0 proto udp from any to 217.96.12.12 port = 518
> > pass in quick on ppp0 proto udp from any port = 518 to 217.96.12.12
>
> These two lines say the same thing. One of them is probably wrong.

so i must not understand it.

what i mean is:

pass every packed incoming through leased line (ppp0) from anywhere to my
machine port 518

and second

pass every packed incoming through leased line (ppp0) from anywhere from
port 518 to any port of my machine

> Do you have static IP?

yes.

> > But when i first request talk and user@another-host answers - connection
> > isn't established but talk request are shown instead.
>
> I'd get it working locally first, and take it from there.

locally works perfect.