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 FortiGates I was interested in the results here as well.
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 phase1/2 proposals = crypto algorithms. The results were as expected with one exception.
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 networking (static/dynamic routing such as OSPF & BGP, IPv6, NAT), basic firewalling (access policies), and IPsec VPN. Hence I am using a couple of SSGs in my lab when playing with routing protocols and so on.
After a factory reset of those firewalls there are some default settings such as zones at a few interfaces and default IP addresses. Therefore I put the following commands together in order to cleanup the default config to have only IP addresses and default routes which is a good starting point for lab configurations. Let’s go:
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 for Palo Alto and Fortinet I am listing the most common used commands for the ScreenOS devices as a quick reference / cheat sheet. These are only the commands that are needed for deep troubleshooting sessions that cannot be done solely on the GUI.
How to route traffic inside an IPv6 site-to-site VPN tunnel if one side offers only dynamic IPv6 prefixes? With IPv4, the private network segments were statically routed through the tunnel. But with a dynamic prefix, a static route is not possible. That is, a dynamic routing protocol must be used. Here is an example of how I used OSPFv3 for IPv6 between my VPN endpoints.
In detail, I have a home office with a dual stack ISP connection. However, this connection has a dynamic IPv6 prefix: After every reboot or lost connection of the firewall, I get a new IPv6 prefix. This is really bad for building a site-to-site VPN to the headquarter. Since I don’t want to use any kind of NAT/NPTv6 with unique local addresses, I am talking OSPFv3 over the VPN tunnel in order to route the dynamic prefix range (global unicast) via the tunnel.
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, Germany. (Refer to this post for details about this dual stack procedure.)
It was *really* hard to get the correct configuration in place. I was not able to do this by myself at all. Also Google did not help that much. Finally, I opened a case by Juniper to help me finding the configuration error. After four weeks of the opened case, I was told which command was wrong. Now it’s working. ;) Here we go.
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 network diagram and the configuration commands/screenshots for all devices. Furthermore, I am listing some basic troubleshooting commands. In the last section, I provide a Tcpdump/Wireshark capture of an initial OSPFv3 run.
I am not going into deep details of OSPFv3 at all. But this lab should give basic hints/examples for configuring OSPFv3 for all of the listed devices.
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 multiple VRs. Now it works. ;) So, here are the required steps:
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 as Teredo or SixXS are found on different literatures. However, another method that is not often explained is to tunnel the IPv6 packets through a VPN connection. For example, if the main office has a native IPv6 connection to the Internet, as well as VPN connections to its remote offices, it is easy to bring IPv6 subnets to these stations.
Here is how I did it with some Juniper SSG firewalls:
Since IPv6 gets more and more important, I am using it by default on all my test firewalls, which of course support IPv6. However, when comparing the different functions and administration capabilities, they vary significantly.
Here comes my short evaluation of the IPv6 functions on the following four firewalls: Cisco ASA, Fortinet FortiGate, Juniper SSG, and Palo Alto.
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 the just mentioned post – mainly because of the higher security level they offer. I tested the site-to-site IPsec connections with a Juniper ScreenOS firewall and a Fortinet FortiGate firewall. (Currently, neither the Palo Alto nor the Cisco ASA support these groups.)
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, along with an overview of my laboratory.