A popular way to provide network security is with a services gateway. The term gateway (an older term for what we now call a router) is used today for a device that connects two dissimilar types of networks: LAN and WAN, public and private, and so on. A modern gateway usually doesn't route because it has enough to do translating between one type of network and another. The services part of the term just means that the gateway supplies more than simple connectivity. Services are different than applications that a client might access and run on a server. Services are applied as traffic passes back and forth between client and server through the gateway. Security is one type of service; network address translation (NAT) is another. We cover both services in this chapter.
The SRX Series Services Gateway runs the Junos OS and is the device considered in this chapter. Because SRX Series Services Gateway is a handful to write and a mouthful to pronounce, we just call it the SRX.
After you install the SRX hardware, as covered in Chapter 5 (in general terms), you can access the services gateway for configuration in the following four ways:
Most users make sure they are familiar with both the CLI and ...