netscreen 5gt upgrade OS procedure

i have 5gt netscreen firewall with os 4 on it. how do i upgrade to 5?
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You need to have the SOS software version 5.0; if you have then you need to load the image on TFTP server, after that issue the following command on device CLI:

save software from tftp <server-ip> <file-name> to flash

After the file is loaded on the device, then you need to reboot to have the firmware change take effect, to reboot issue command:


After the device boots up, you can check if the system is upgraded by issuing command:

get system

you should be able to see 5.0 as version for SOS.

If you do wish, you can also do the same process from webUI, however, serial access to device would be recommended.

Please let know if you need more details.

Thank you.

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jonnydollarAuthor Commented:
ok thats excellent information for the process. I do not have the SOS 5 yet. how can i get that? is it free or would it require purchasing from netscreen?
You need to go to and login using the login credentials; if you do not have one then you can contact Juniper support and they would help you with that.

Please note that SOS is not available for free you need to have an active support license, if you wish you can purchase the license from Juniper; please contact Juniper support for more options details.

Thank you.
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