Phase stabilizers only work for your ships and if you have a certain pact, your allies. Enemies cannot use your phase stabilizer routes, though if they have Kosturas as well obviously they can use that to get around your defenses.

Thank you, now I only have to worry about the rebels.

Yea, I have all my planets at at least 3000hp, all terrans at least 4500, and either turrets or a small fleet at all of them. In this map, the phase lanes are very long and tedious to cross. I also only have the basic game. Finally, I am doing a marathon game with ... I *think* 8 star systems. All consisting of bout 15 or so random planets. My hub worlds are perticularly defended. I have 2, one as a main defence near the star, and another as a final defence (and was my kick-off during my colonization spree!). Both of those have a friget factory, a cap ship factory, Many defences, and a defence fleet. Also, 2 of my core worlds have Heavily defended Kostura cannons that I regualarly use on my enemies' worlds to assist my AI allies!