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JNCIA-SEC and JNCIS-SEC lab 1 of 16

SRX first steps with zones and host-inbound traffic

Bring a blank SRX into service: address its interfaces, build trust, dmz and untrust zones, decide what may reach the firewall itself, write the first policy and read the session table.

Run this lab

It needs Lite: its 4 nodes are set to 5 vCPU and 7,168 MB in total. That fits the free demo too.

In your workspace: Shared, then JNCIA-SEC and JNCIS-SEC SRX security guided labs, then 01 - SRX first steps with zones and host-inbound traffic

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Level
Beginner
Time
About 50 minutes
Nodes need
5 vCPU, 7,168 MB
Smallest plan
Lite

The scenario

Hartwell Marine runs a boatyard at Poole. A new SRX firewall (a vSRX here) has just been racked between the office LAN, a small DMZ and the internet. It has a hostname and a login and nothing else. You'll bring it into service: learn what you're looking at, address the interfaces, build three security zones, decide what may talk to the firewall itself, and write the first policy.

DeviceInterfaceAddressZone or gateway
SRXge-0/0/0203.0.113.1/24zone untrust
SRXge-0/0/110.10.10.1/24zone trust
SRXge-0/0/210.10.20.1/24zone dmz
LAN-PCeth010.10.10.10/24gateway 10.10.10.1
DMZ-WEBeth010.10.20.10/24gateway 10.10.20.1
OUTeth0203.0.113.10/24gateway 203.0.113.1

LAN-PC is a member of staff's desktop. DMZ-WEB and OUT each run a web server on port 80. All three already have their addresses and gateways.

What you’ll practise

  • Explain flow-based forwarding and what a session is
  • Configure interfaces, units and security zones
  • Use host-inbound traffic to protect the firewall itself
  • Write a first interzone policy and read the session table
  • Enable J-Web from the trust zone

The tasks

  1. Look around
  2. Address the interfaces
  3. Build the zones
  4. Host-inbound traffic
  5. The first policy
  6. J-Web

The Lab Tasks pane has the scenario, these tasks, the checks to run, hints and the full solution.

Topology and devices

The network as it opens in EVE-NG, drawn from the lab’s own canvas, and the image each node runs.

Topology of SRX first steps with zones and host-inbound traffic4 nodes, 3 links. Every link is listed as text below the diagram.SRXLAN-PCDMZ-WEBOUTge-0/0/2eth0ge-0/0/1eth0ge-0/0/0eth0
4 nodes, with the interface names each link uses. On a narrow screen, scroll the diagram sideways.
Every link, as text
  • SRX ge-0/0/0 to OUT eth0
  • SRX ge-0/0/1 to LAN-PC eth0
  • SRX ge-0/0/2 to DMZ-WEB eth0
Nodes in SRX first steps with zones and host-inbound traffic, with the image each runs and the vCPU and RAM it’s set to
NodeDeviceImage in Add NodeSet to
SRXJuniper vSRX NextGen templatevsrxng-24.4R1.92 vCPU, 4,096 MB
LAN-PCEVE-NG GUI server (Docker)eve-gui-server:latest1 vCPU, 1,024 MB
DMZ-WEBEVE-NG GUI server (Docker)eve-gui-server:latest1 vCPU, 1,024 MB
OUTEVE-NG GUI server (Docker)eve-gui-server:latest1 vCPU, 1,024 MB

How to open this lab

  1. Sign in to your workspace at lab.cloudlabbox.com.

  2. In File Manager, open Shared, then the folder JNCIA-SEC and JNCIS-SEC SRX security guided labs.

  3. Open 01 - SRX first steps with zones and host-inbound traffic and start its nodes, then open Lab Tasks for the scenario and the steps.

The lab is read-only. You can start the nodes and configure the devices, but changes to the topology can’t be saved. To change it, rebuild it in your own folder.

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CloudLabBox is independent of Cisco and Juniper Networks. The lab follows exam topics and isn’t vendor training material; vendor names identify the exams and the images in the workspace.