Enable IPv6 on Juniper SSG Firewall

IPv6 is supported on Screen OS 6.2 and higher. By default IPv6 is not enabled on the firewall.

To check if IPv6 is enabled do the following. Start a SSH or Telnet connection to the firewall. type:

get envar

If not enabled the result is

If enabled there is a line called:


To enable IPv6 type the following.

set envar ipv6=yes


reset save-config yes

The firewall is restarting. Now let’s check if everything works, do the same as above.

The firewall support IPv6 now. For more information about IPv6 and the Juniper Firewall see the documentation found here.

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The information in this article is provided “AS IS” with no warranties, and confers no rights. This article does not represent the thoughts, intentions, plans or strategies of my employer. It is solely my opinion.


Marco works for ViaData as a Senior Technical Consultant. He has over 15 years experience as a system engineer and consultant, specialized in virtualization. VMware VCP4, VCP5-DC & VCP5-DT. VMware vExpert 2013, 2014,2015 & 2016. Microsoft MCSE & MCITP Enterprise Administrator. Veeam VMSP, VMTSP & VMCE.