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Juniper ScreenOS with a 6in4 Tunnel
Yes, I know I know, the Juniper ScreenOS devices are Out-of-Everything (OoE), but I am still using them for a couple of labs. They simply work as a router and VPN gateway as well as a port-based...
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My IPv6/Routing/Cisco Lab Rack (2019)
My lab rack of 2019 consists of multiple Cisco routers and switches, as well as Juniper ScreenOS firewalls for routing purposes, a Palo Alto Networks firewall, a Juniper SRX firewall, a server for...
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NTP Authentication at Juniper ScreenOS
Yes, ScreenOS is end-of-everything (EoE), but for historical reasons I still have some of them in my lab. ;D They simply work, while having lots of features when it comes to IPv6 such as DHCPv6-PD....
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Route- vs. Policy-Based VPN Tunnels
There are two methods of site-to-site VPN tunnels: route-based and policy-based. While some of you may already be familiar with this, some may have never heard of it. Some firewalls only implement one...
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Site-to-Site VPNs with Diffie-Hellman Groups 19 & 20 (Elliptic Curve)
Similar to my test with Diffie-Hellman group 14 shown here I tested a VPN connection with the elliptic curve Diffie-Hellman groups 19 and 20. The considerations why to use these DH groups are listed in...
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IPsec Site-to-Site VPN FortiGate Juniper SSG
Here comes the step-by-step guide for building a site-to-site VPN between a FortiGate and a ScreenOS firewall. Not much to say. I am publishing several screenshots and CLI listings of both firewalls,...
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Juniper ScreenOS NAT Overview: MIP DIP VIP
MIP DIP VIP. I am sometimes confused with the NAT names of the Juniper ScreenOS devices. Therefore, I drew a small figure with a few basic examples for these NAT types. Note that this figure does not...
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Generating SSHFP Records Remotely
Until now I generated all SSHFP resource records on the SSH destination server itself via [crayon-5ade4fa718c46198788404-i/]. This is quite easy when you already have an SSH connection to a standard...
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Juniper ScreenOS IPv4 vs. IPv6 Throughput Tests
And finally the throughput comparison of IPv6 and legacy IP on a Juniper ScreenOS firewall. Nobody needs this anymore since they are all gone. ;) But since I did the same speedtests for Palo Alto and...
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Juniper ScreenOS VPN Speedtests
Just for fun some more VPN throughput tests, this time for the late Juniper ScreenOS firewalls. I did the same Iperf TCP tests as in my labs for Fortinet and Palo Alto, while I was using six different...
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Juniper ScreenOS Initial Cleanup Config
I still like the Juniper ScreenOS firewalls such as the SSG 5 or the SSG 140. However, they are End of Everything (EoE) and not used at the customers anymore. But they still do their job in basic...
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Juniper ScreenOS NAT Overview: MIP DIP VIP
MIP DIP VIP. I am sometimes confused with the NAT names of the Juniper ScreenOS devices. Therefore, I drew a small figure with a few basic examples for these NAT types. Note that this figure does not...
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MRTG/Routers2: Template Juniper SSG
Finally, this is how I am monitoring my Juniper ScreenOS SSG firewalls with MRTG/Routers2. Beside the interfaces (that can be built with cfgmaker) I am using my template in order to monitor the CPU...
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CLI Commands for Troubleshooting Juniper ScreenOS Firewalls
Yes I know, ScreenOS is “End of Everything” (EoE). However, for historical reasons I am still managing many Netscreen/ScreenOS firewalls for some customers. Similar to my troubleshooting CLI commands...
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Where to terminate Site-to-Site VPN Tunnels?
When using a multilayer firewall design it is not directly clear on which of these firewalls remote site-to-site VPNs should terminate. What must be considered in such scenarios? Differentiate between...
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Tufin SecureTrack: Adding Devices
Since a few weeks I am using Tufin SecureTrack in my lab. A product which analyzes firewall policies about their usage and their changes by administrators (and much more). Therefore, the first step is...
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Juniper ScreenOS: DHCPv6 Prefix Delegation
The Juniper ScreenOS firewall is one of the seldom firewalls that implements DHCPv6 Prefix Delegation (DHCPv6-PD). It therefore fits for testing my dual stack ISP connection from Deutsche Telekom,...
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OSPFv3 for IPv6 Lab: Cisco, Fortinet, Juniper, Palo Alto, Quagga
Similar to my test lab for OSPFv2, I am testing OSPFv3 for IPv6 with the following devices: Cisco ASA, Cisco Router, Fortinet FortiGate, Juniper SSG, Palo Alto, and Quagga Router. I am showing my lab...
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Policy-Based Routing on ScreenOS with different Virtual Routers
I already puslished a blog post concerning policy-based routing on a Juniper firewall within the same virtual router (VR). For some reasons, I was not able to configure PBR correctly when using...
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IPv6 through IPv4 VPN Tunnel with Juniper SSGs
The most common transition method for IPv6 (that is: how to enable IPv6 on a network that does not have a native IPv6 connection to the Internet) is a “6in4″ tunnel. Even other tunneling methods such...
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