Fight Early Zerg Rushes With The Terran Wall-In - Starcraft 2
A popular strategy used to be to use 1 Barracks and 2 Supply Depots to complete the wall off at your choke point. While this technique might work ok against Protoss, it"s less effective against Zerg. This is because banelings pose a huge threat at your front door if you have any supply depots.Depots are fragile with only 350 hit points so it only takes 5 banelings to blow one up. Even worse is if there are 2 depots right next to each other, the splash damage will destroy them both! Then a whole stream of zerglings can get through that opening and flood your base, which means an early loss.
Instead, use a Barracks and a Factory to wall yourself in. That way you won"t get supply blocked by an easy depot kill, and your wall will be much stronger since both buildings have over 1000 hit points.
If you are expecting a Baneling bust, complete the wall by adding a bunker behind your 2 buildings to fill the gap, then load it up with marines and you"ll be pleny safe from any early rush shenanigans.
To get your Factory up fast, put a refinery down before your first barracks, this will help you stockpile a bunch of gas while your barracks builds and give you the fast factory to complete your wall early enough to survive.