[SR-Users] Disabling weak SSL Cypher suites

[Federico Cabiddu]

Hi Arik,
I think that the problem is that you are using a configuration file for tls.
In this case you have to specify there the parameters like ciphers, because
the module's ones will be ignored:
http://www.kamailio.org/docs/modules/5.3.x/modules/tls.html#tls.p.config.

Cheers,

Federico

On Sun, Dec 22, 2019 at 6:16 PM Arik Halperin <arik.halperin at s3code.com>
wrote:

> Federico, Thank you
>
> I added these lines to my config:
>
> #!ifdef WITH_TLS
> # ----- tls params -----
> modparam("tls","config","/usr/local/etc/kamailio/tls.cfg")
> modparam("tls", "cipher_list", "HIGH")
> modparam("tls", "tls_method", "TLSv1.2+")
> #!endif
>
> But it still doesn’t work.
>
> I ran this test, but it still says:
>
> Cipher Suites
>
> # TLS 1.0 (suites in server-preferred order)
> TLS_RSA_WITH_AES_256_CBC_SHA (0x35)   *WEAK* 256
> TLS_RSA_WITH_CAMELLIA_256_CBC_SHA (0x84)   *WEAK* 256
> TLS_RSA_WITH_AES_128_CBC_SHA (0x2f)   *WEAK* 128
> TLS_RSA_WITH_SEED_CBC_SHA (0x96)   *WEAK* 128
> TLS_RSA_WITH_CAMELLIA_128_CBC_SHA (0x41)   *WEAK* 128
> TLS_RSA_WITH_RC4_128_SHA (0x5)   *INSECURE* 128
> TLS_RSA_WITH_RC4_128_MD5 (0x4)   *INSECURE* 128
> TLS_RSA_WITH_3DES_EDE_CBC_SHA (0xa)   *WEAK*
>
>
> I don’t know how to get rid of the insecure ones.
>
> Best Regards,
> Arik
>
>
> On 10 Dec 2019, at 9:03, Federico Cabiddu <federico.cabiddu at gmail.com>
> wrote:
>
> Hi,
> for enabling a specific set of ciphers have a look at tls module's
> cipher_list param:
> http://www.kamailio.org/docs/modules/5.4.x/modules/tls.html#tls.p.cipher_list
> .
> For supporting specific versions of TLS look at tls_method param:
> http://www.kamailio.org/docs/modules/5.4.x/modules/tls.html#tls.p.tls_method
> .
>
> Cheers,
>
> Federico
>
> On Tue, Dec 10, 2019 at 7:30 AM Arik Halperin <arik.halperin at s3code.com>
> wrote:
>
>> Hello,
>>
>> How can I disable:
>>
>>
>> TLS_RSA_WITH_RC4_128_SHA (0x5)   *INSECURE*128
>>
>> TLS_RSA_WITH_RC4_128_MD5 (0x4)   *INSECURE*128
>>
>> What should I put in cypher_list in order to disable the above?
>>
>> I would also like support TLS 1.2 and TLS 1.3, but remove support for 1.0
>> and 1.1
>>
>> Thanks,
>> Arik Halperin
>> _______________________________________________
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