Hands-on Junos CLI tutorials, OSPF and BGP configuration guides, SRX firewall policies and step-by-step network troubleshooting — lab-tested by working network engineers preparing for JNCIA, JNCIS and beyond.
Latest Guide
NAT is the number one SRX problem posted on Reddit and the Juniper forums. This field guide shows how to read show security flow session, verify NAT rule hits, fix proxy-arp and pin down why traffic is silently dropped.
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Step-by-step EVPN-VXLAN multi-vendor interop guide for Junos MX/QFX, Cisco Nexus NX-OS and Arista EOS — Type-2/Type-3 routes, BGP address-family and proven troubleshooting.
Junos OS 23.2R1 is out: enhanced EVPN-VXLAN on MX, SRX inline IDS improvements, security advisories fixed in this train and upgrade guidance.
A repeatable field procedure for diagnosing BGP session flaps on Junos: check state, parse syslog, inspect hold-time expiry vs. transport resets.
How the Juniper SRX security model works: security zones, address books, policies, screen options and source/destination NAT with a full example.
End-to-end OSPFv2 configuration on Juniper MX routers: interfaces, areas, authentication, route redistribution and verification commands.
A quick-start guide to the Junos CLI hierarchy, operational mode, configuration mode and the commit model that makes Junos safe to operate.