How can we disable rc4 in A10?
There is no option of RC4 in cipher template.
Can I do something like this?
DEFAULT:!RC4:!SSLv3:!SSLv2:!TLSv1
If yes, where to add this?
Thanks in advance!
Within the cipher template, only ciphers which are added will be offered for negotiation. If you exclude the RC4 ciphers from the template, this effectively disables RC4. Attached is the supported ciphers list.
Thanks for your response.
If I don’t select any specific cipher template in the client-ssl, does it mean it will present all the ciphers in this list to the user?
Interestingly, I tested a VIP in ssllabs and could see that RC4 is enabled for TLS 1.2 1.1 and 1.0 as well, but when I see the list of ciphers it presents while creating a new cipher template, there is no cipher with RC4 in it…
That is curious. Yes, if no ciphers are specified, then the default should be all ciphers which the device supports.
What version of ACOS are you running? Would you like to share your cipher & client-ssl template here?
version 4.1.1-P6, build 62 (Nov-10-2017,20:11)
there is no cipher template attached to this client-ssl template.
when I test this VIP in ssllabs, I see this:
TLS_RSA_WITH_RC4_128_SHA (0x5) INSECURE
==========================
This is but I get when I try to create a new cipher template: But I don’t see so many Ciphers in the GUI. Interestingly, the cipher shown above is not in the below list. I am curious from where is it coming and how to disable RC4 in all the protocols.
A10(config)#slb template cipher test6
A10(config-cipher)#?
clear Clear or Reset Functions
do To run exec commands in config mode
end Exit from configure mode
exit Exit from configure mode or sub mode
no Negate a command or set its defaults
show Show Running System Information
user-tag Customized tag
write Write Configuration
SSL3_RSA_DES_192_CBC3_SHA SSL3_RSA_DES_192_CBC3_SHA
SSL3_RSA_RC4_128_MD5 SSL3_RSA_RC4_128_MD5
SSL3_RSA_RC4_128_SHA SSL3_RSA_RC4_128_SHA
TLS1_RSA_AES_128_SHA TLS1_RSA_AES_128_SHA
TLS1_RSA_AES_256_SHA TLS1_RSA_AES_256_SHA
TLS1_RSA_AES_128_SHA256 TLS1_RSA_AES_128_SHA256
TLS1_RSA_AES_256_SHA256 TLS1_RSA_AES_256_SHA256
TLS1_DHE_RSA_AES_128_GCM_SHA256 TLS1_DHE_RSA_AES_128_GCM_SHA256
TLS1_DHE_RSA_AES_128_SHA TLS1_DHE_RSA_AES_128_SHA
TLS1_DHE_RSA_AES_128_SHA256 TLS1_DHE_RSA_AES_128_SHA256
TLS1_DHE_RSA_AES_256_GCM_SHA384 TLS1_DHE_RSA_AES_256_GCM_SHA384
TLS1_DHE_RSA_AES_256_SHA TLS1_DHE_RSA_AES_256_SHA
TLS1_DHE_RSA_AES_256_SHA256 TLS1_DHE_RSA_AES_256_SHA256
TLS1_ECDHE_ECDSA_AES_128_GCM_SHA256 TLS1_ECDHE_ECDSA_AES_128_GCM_SHA256
TLS1_ECDHE_ECDSA_AES_128_SHA TLS1_ECDHE_ECDSA_AES_128_SHA
TLS1_ECDHE_ECDSA_AES_128_SHA256 TLS1_ECDHE_ECDSA_AES_128_SHA256
TLS1_ECDHE_ECDSA_AES_256_GCM_SHA384 TLS1_ECDHE_ECDSA_AES_256_GCM_SHA384
TLS1_ECDHE_ECDSA_AES_256_SHA TLS1_ECDHE_ECDSA_AES_256_SHA
TLS1_ECDHE_RSA_AES_128_GCM_SHA256 TLS1_ECDHE_RSA_AES_128_GCM_SHA256
TLS1_ECDHE_RSA_AES_128_SHA TLS1_ECDHE_RSA_AES_128_SHA
TLS1_ECDHE_RSA_AES_128_SHA256 TLS1_ECDHE_RSA_AES_128_SHA256
TLS1_ECDHE_RSA_AES_256_GCM_SHA384 TLS1_ECDHE_RSA_AES_256_GCM_SHA384
TLS1_ECDHE_RSA_AES_256_SHA TLS1_ECDHE_RSA_AES_256_SHA
TLS1_RSA_AES_128_GCM_SHA256 TLS1_RSA_AES_128_GCM_SHA256
TLS1_RSA_AES_256_GCM_SHA384 TLS1_RSA_AES_256_GCM_SHA384
TLS1_ECDHE_RSA_AES_256_SHA384 TLS1_ECDHE_RSA_AES_256_SHA384
TLS1_ECDHE_ECDSA_AES_256_SHA384 TLS1_ECDHE_ECDSA_AES_256_SHA384
A10(config-cipher)#
slb template client-ssl *.xxx
chain-cert godaddy_bundle-CA-G2
cert xxx
client-certificate Ignore
forward-proxy-verify-cert-fail-action drop
forward-proxy-cert-revoke-action bypass
forward-proxy-cert-unknown-action bypass
forward-proxy-hash-persistence-interval 30
forward-proxy-ssl-version 33
forward-proxy-cert-cache timeout 3600
forward-proxy-cert-cache limit 524288
forward-proxy-cert-not-ready-action bypass
key xxx
session-cache-size 0
session-cache-timeout 0
session-ticket-lifetime 0
version 33 32
!
I do see the confusion around that cipher. I also can find no reference of it in the supported cipher list or in the configuration options.
My recommendation would be to configure a cipher template and bind that to the client-ssl template. You already have “version” configured, so adding the cipher template should produce the desired results.