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Juniper

Firewall Vendor Transitioning

Introduction This is quite a complex topic and can still be a tricky one to get right but I have developed a proven methodology that can be used very successfully.I have now used this methodology multiple times to transition from

David Messenger 22nd April 202022nd April 2020 Firewall, Juniper, Netscreen, Networking, Palo Alto, Security No Comments Read more

Juniper Netscreen Track IP

Juniper Netscreen Track IP

Introduction IP tracking can be used to change routing based on the connectivity of configured IP addresses. This can be used with either default routes or static routes which in normal circumstances would not change in the event of reachability

David Messenger 12th June 201712th June 2017 Firewall, Juniper, Netscreen, Netscreen, Networking, Security No Comments Read more

Troubleshooting Juniper Netscreen VPNs Down

Troubleshooting Juniper Netscreen VPNs Down

Introduction If you’ve ever needed to investigate a site to site tunnel which is down at 05:00 in the morning, this might just help you get to the bottom of it a bit faster. Steps to take Access your firewall

David Messenger 6th April 2017 Firewall, Juniper, Netscreen, Security No Comments Read more

ScreenOS Policy-Based Routing Commands Software Version 6.3.0.1.0.0.0.0

ScreenOS Policy-Based Routing Commands Software Version 6.3.0.1.0.0.0.0

Introduction This is a reminder for me where to find the commands because there is a bug in the web gui that means whenever you try to apply an action-group it will implement it with a next-hop address and next-hop

David Messenger 7th January 2016 Firewall, Juniper, Netscreen, Networking No Comments Read more

Juniper Netscreen Packet-Tracer Alternative (Debug Flow)

Juniper Netscreen Packet-Tracer Alternative (Debug Flow)

Introduction Thought I would write a quick one on this as I often need to look it up as it is incredibly helpful. Cisco ASA has the packet-tracer command for testing but netscreen firewalls have something a bit different. Debug

David Messenger 9th December 20159th December 2015 Firewall, Juniper, Netscreen, Security No Comments Read more

Recent Posts

  • Panorama Push Failure
  • Loading Environment Variables in a Cron Job
  • Advertising a non-existent route to BGP in PAN-OS
  • Network Design – VDSL
  • NetBox Automation
  • Testing DNS Glue Records
  • Updating Netfilter Firewall Rules
  • Palo Alto Useful Links and Commands
  • Useful Python Snippets
  • Find & Replace Multiple Files

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