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Dez's avatar
Dez
Icon for Nimbostratus rankNimbostratus
Dec 07, 2020

Is there a way on F5 to disable rsa_pss* signature algorithms?

I am having an issue with SSL decryption on my Palo Alto firewall in front of F5. It works with Internet Explorer, but not Firefox or Chrome. According to Palo Alto TAC, the issue is certain signature algorithms - see https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000PMR7CAO

 

Is there a way on F5 to disable rsa_pss* signature algorithms?

LTM
security
  • jaikumar_f5's avatar
    jaikumar_f5
    Icon for MVP rankMVP
    Dec 08, 2020

    Yes this is doable from what I've learnt from articles. For this your Bigip needs to be on 14.x or above.

    Beginning in 14.x you have the option to use Cipher Rule, where you can specify the list of signature algorithm for negotiation's.

     

    Other than that, I dont see a method to achieve this.