I am asked to replace a couple of firewalls with new SRX 345s. I have received the new hardware from the client. But I haven't got any license for the device. Do I need to install any sort of license in the device to deploy this device as standard firewalls without any fancy capabilites like IPS.
Licenses are only for additional functionality, such as UTM (anti-spam, anti-virus, IDP, etc) and dynamic VPNs. You do not need additional licenses for basic firewall abilities.
Some pointers on LICENSE ACTIVATION KEYS…