Forum Discussion
JD1
Altostratus
AltostratusTMUI / Configuration WebUI - TLS/SSL Configuration - ECDHE
Hi All,
I'm currently using BIG-IP 11.6.2 HF1.
I'm required to secure the Management WebUI ciphers offered out.
I'd prefer to drop all key exchange methods except for ECDHE.
However, it seems
modify sys httpd ssl-ciphersuiteopenssl ciphers -vsys httpd ssl-ciphersuiteSo my question is, in three parts:
- Why doesn't
recognise ECDHE?sys httpd ssl-ciphersuite - Is there anyway to utilize ECDHE on
on 11.6.2 HF1?sys httpd - Does 12.x support this?
Many thanks,
JD
But the point being is that the command sys httpd ssl-ciphersuite on 11.6.x, doesn't seem to then correctly configure Apache services to use this for the TMUI.
i understand this has been corrected in 12.0.
Hi JD,
It is possible to disable all cipher suites other than the ones using ECDHE by appending ':!kDH:!kEDH:!kRSA' (without the quotes) to your cipher string within httpd. That should disable all DH, EDH/DHE, RSA key exchange based cipher suites. We need to specify the 'k' when enabling/disabling a certain key exchange when you modify the string on httpd, as it's based on the openssl stack. When enabling/disabling them within the SSL profiles, you don't need to specify that, because that is natively built into TMM and you can simply specify ':!DHE:!DH:!RSA' (without the quotes) to disable those key exchange based cipher suites.
Please let me know if this answers your question.
JD1Hi Ashwin,
Thanks for the reply.
ECDHE needs to be there to begin with though, and isn't. It looks like 12.x does have it when I took it to lab. But I currently need it in 11.6.2.
As for SSL profiles, I'm not looking at/referring to SSL profiles as this is outside of TMM and is Apache via mod_ssl (configured via the sys httpd ssl-ciphersuites).
If there's anyway to enable ECDHE for Apache/Mod_SSL on 11.6.2, I'm all ears.
Thanks,
JD
Hello JD,
We do see that ECDHE based cipher suites being available on httpd for 11.6.x when I run the following command:
openssl ciphers -v 'DEFAULT:!aNULL:!eNULL:!LOW:!RC4:!MD5:!EXP'If you see ECDHE not working in 11.6.x, then that is likely due to the older version of mod_ssl being used there. We have since upgraded the mod_ssl package in 12.x, which is why you see it there. In any case, the answer to your question is no. We don't support updating components/packages like mod_ssl.
- JD1
Hi Ashwin,
Absolutely, I also see openssl ciphers show the availability of ECDHE in the compiled openssl version (mentioned in original question).
But the point being is that the command
on 11.6.x, doesn't seem to then correctly configure Apache services to use this for the TMUI.sys httpd ssl-ciphersuiteI think you're confirming my suspicions, with mod_ssl possibly being outdated.
(If you want to update your original answer, I'll mark as solved by it and accept we have to upgrade).
Thanks,
JD
Ashwin_VenkatEmployee
Hi JD,
It is possible to disable all cipher suites other than the ones using ECDHE by appending ':!kDH:!kEDH:!kRSA' (without the quotes) to your cipher string within httpd. That should disable all DH, EDH/DHE, RSA key exchange based cipher suites. We need to specify the 'k' when enabling/disabling a certain key exchange when you modify the string on httpd, as it's based on the openssl stack. When enabling/disabling them within the SSL profiles, you don't need to specify that, because that is natively built into TMM and you can simply specify ':!DHE:!DH:!RSA' (without the quotes) to disable those key exchange based cipher suites.
Please let me know if this answers your question.
- JD1
Hi Ashwin,
Thanks for the reply.
ECDHE needs to be there to begin with though, and isn't. It looks like 12.x does have it when I took it to lab. But I currently need it in 11.6.2.
As for SSL profiles, I'm not looking at/referring to SSL profiles as this is outside of TMM and is Apache via mod_ssl (configured via the sys httpd ssl-ciphersuites).
If there's anyway to enable ECDHE for Apache/Mod_SSL on 11.6.2, I'm all ears.
Thanks,
JD
- Ashwin_Venkat
Hello JD,
We do see that ECDHE based cipher suites being available on httpd for 11.6.x when I run the following command:
openssl ciphers -v 'DEFAULT:!aNULL:!eNULL:!LOW:!RC4:!MD5:!EXP'If you see ECDHE not working in 11.6.x, then that is likely due to the older version of mod_ssl being used there. We have since upgraded the mod_ssl package in 12.x, which is why you see it there. In any case, the answer to your question is no. We don't support updating components/packages like mod_ssl.
- JD1
Hi Ashwin,
Absolutely, I also see openssl ciphers show the availability of ECDHE in the compiled openssl version (mentioned in original question).
But the point being is that the command
on 11.6.x, doesn't seem to then correctly configure Apache services to use this for the TMUI.sys httpd ssl-ciphersuiteI think you're confirming my suspicions, with mod_ssl possibly being outdated.
(If you want to update your original answer, I'll mark as solved by it and accept we have to upgrade).
Thanks,
JD
- nitass
But the point being is that the command sys httpd ssl-ciphersuite on 11.6.x, doesn't seem to then correctly configure Apache services to use this for the TMUI.
i understand this has been corrected in 12.0.
- JD1
Yes, it has. I have tested that. It looks like my only option.
That's fine, just a bit more planning.
nitass_89166Noctilucent
But the point being is that the command sys httpd ssl-ciphersuite on 11.6.x, doesn't seem to then correctly configure Apache services to use this for the TMUI.
i understand this has been corrected in 12.0.
- JD1
Yes, it has. I have tested that. It looks like my only option.
That's fine, just a bit more planning.
