TZ-100 – Not affected
TZ-105 – Not affected
TZ-200 – Not affected
TZ-215 – Not affected
NSA-220 – Not affected
NSA-250M – Not affected
NSA-2400 – Not affected
NSA-2600 – Not affected
NSA-3500 – Not affected
NSA-3600 – Not affected
NSA-4500 – Not affected
NSA-4600 – Not affected

All SRA series – affected – Please update firmware – call us
E-Class Secure Remote Access (Aventail) affected – Please update firmware – call us

More about this bug here https://heartbleed.com/