1. Talk to Councilor Draneth in the Temple of Kuthos
The temple is located south of the eastern bank of Valmond Draneth will instruct you to kill 100 Talazarian Reavers and 100 Talazarian Shadow Priests
2. Kill the monsters.
The monsters are located South of Valmond
3. Talk to Draneth and he will give you the Alliance Insignia
Make your way to Farsteed now Follow the road from the north exit of Valmond all the way north.
4. Talk to the guard at Farstead, in the room to the right and show him the Alliance Insignia
You will get permanent permission to pass through the keep You will also be rewarded with 50,000 experience pool.