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Andre-Germany's avatar
Andre-Germany
Icon for Nimbostratus rankNimbostratus
Jul 20, 2021

Cipher-Suite

Hello all,

I would like to build a cipher suite that only allows the following two ciphers:

TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384

TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256

 

Currently the following 3 additional ciphers are allowed

TLS_ECDHE_RSA_WITH_AES_256_CBC

TLS_RSA_WITH_AES_256_GCM_SHA384

TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA

The current cipher string looks like this

!TLSv1:!TLSv1_1:!SSLv2:!EXPORT:!DHE+AES-GCM:!DHE+AES:!ECDHE+AES-GCM:ECDHE+AES:ECDHE+RSA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:RSA+AES-GCM+SHA384:-MD5:-SSLv3:-RC4:!3DES

 

How must the cipher string be changed to get the desired result?

 

Thnks for you help

BIG-IP
LTM
security
  • Enes_Afsin_Al's avatar
    Enes_Afsin_Al
    Icon for MVP rankMVP
    Jul 24, 2021

    Hi Andre-Germany,

    IANA name:

    TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384

    OpenSSL name:

    ECDHE-RSA-AES256-SHA384

    IANA name:

    TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256

    OpenSSL name:

    ECDHE-RSA-AES128-SHA256

    Cipher Suites:

    ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256
    [root@f5:Active:Standalone] config # tmm --clientciphers 'ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256'
0: 49192	ECDHE-RSA-AES256-SHA384	256	TLS1.2  AES	SHA384	ECDHE_RSA 
1: 49191	ECDHE-RSA-AES128-SHA256	128	TLS1.2	AES	SHA256	ECDHE_RSA
  • Andre-Germany's avatar
    Andre-Germany
    Icon for Nimbostratus rankNimbostratus
    Aug 12, 2021

    Now more requirements have been added

     

    What should the whole thing look like now

     

    TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256  TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384  TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256  TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384  TLS_ECDHE_ECDSA_WITH_AES_128_CCM  TLS_ECDHE_ECDSA_WITH_AES_256_CCM  TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256  TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384  TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256  TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384  TLS_DHE_DSS_WITH_AES_128_CBC_SHA256 TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 TLS_DHE_DSS_WITH_AES_128_GCM_SHA256 TLS_DHE_DSS_WITH_AES_256_GCM_SHA384 TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 TLS_DHE_RSA_WITH_AES_128_CCM

    TLS_DHE_RSA_WITH_AES_256_CCM