Vansittart, who was just 16 years old when he made his first Reds debut has put pen to paper on a two-year deal and becomes the club's first summer capture.
In his original spell at Crawley, the striker grabbed 44 goals from 118 appearances before leaving for Sutton United in 1995.
A switch to the Conference with Dover Athletic followed before joining Farnborough where he was restricted to just 14 games last season, scoring six times.
In his original spell at Crawley, the striker grabbed 44 goals from 118 appearances before leaving for Sutton United in 1995.
A switch to the Conference with Dover Athletic followed before joining Farnborough where he was restricted to just 14 games last season, scoring six times.