topic Re: Pruning weak key exchange algo in Pan OS 8.19 in General Topics

Pruning weak key exchange algo in Pan OS 8.19

PaloAltoNewbie2020 — Fri, 09 Apr 2021 14:48:51 GMT

In Palo Alto v8.19, they added functionality to prune multiple weak key exchange algo in one line: (https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-release-notes/pan-os-8-1-addressed-issues/pan-os-8-1-19-addressed-issues.html)

I followed the guide here (https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-cli-quick-start/get-started-with-the-cli/refresh-ssh-keys-mgt-port-connection.html) and tried to prune 2 ciphers in one line but it gives me the error "invalid". I can't prune them one by one as the guide says it won't work that way, but I am able to prune them one by one but just not 2 or more together even following the guide.

Does anyone know what is the correct syntax or what is the issue ?

Re: Pruning weak key exchange algo in Pan OS 8.19

nikoolayy1 — Sat, 10 Apr 2021 21:33:29 GMT

Can you provide a picture of the error and did you test with the example command from the article by copy and paste it, to check if it works atleast from the example from https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-cli-quick-start/get-started-with-the-cli/refresh-ssh-keys-mgt-port-connection.html ?

It could be a new bug as this feature is so new (added to the latest release) and if copy and paste from the aticle you still have issues, then better contact the TAC as 8.1.19 is the latest release and there are no releases to have solved this.

"debug system ssh-kex-prune cipher [diffie-hellman-group1-sha1 diffie-hellman-group-exchange-sha1]"

Re: Pruning weak key exchange algo in Pan OS 8.19

PaloAltoNewbie2020 — Sun, 11 Apr 2021 02:37:13 GMT

Yes we tried all kinds of combinations, without [] ,with [] as in the article.

We bought PA support through another vendor and they had already contacted PA TAC about it but PA TAC is taking a long time to reply so I was wondering if anyone is able to successfully run the command if they have a lab or so to try too.

Re: Pruning weak key exchange algo in Pan OS 8.19

Matthew_Minikel — Thu, 15 Apr 2021 16:59:34 GMT

Need a space between the first "[" and the cipher.

"debug system ssh-kex-prune ciphers [ diffie-hellman-group1-sha1 diffie-hellman-group-exchange-sha1 ]" is successful.

Hope this helps.