At least 2 artist are called Firewall. 1.
SINCERE: Released 10/03 on A State of Trance, a division of Armada Music (Holland). Written and produced by Lange. Additional remix and production on track 2 by Andy Perring. 'Sincere' is a powerful driving, instrumental trancer from Lange, available here in the form of two similar mixes, both of which follow the same format and structure.