Presales have very little to do with actual penetration testing, vulnerability assessments and ethical hacking in general, but as you will have to know the features of the firewalls, and (hopefully) also what it actually means so you can offer the best solutions, then it does relate to network security which isn't bad.
Becoming a network consultant based on a presales job with firewalls is perhaps a big exaggerated, unless you have had other jobs or an education where you've worked with e.g., enterprise switches, routers, etc.
Nothing is impossible, fight for what you want, and you shall eventually achieve it
Calendar Of Events : CONFidence 2013
