Re: Re: Removing SSL renegotiation (Was: Should we back-patch SSL renegotiation fixes?)
| От | Michael Paquier |
|---|---|
| Тема | Re: Re: Removing SSL renegotiation (Was: Should we back-patch SSL renegotiation fixes?) |
| Дата | |
| Msg-id | CAB7nPqR_6i77AcN=goWg=FMszdacNbPWUhhv4PN9k+qHL8PXGQ@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: Re: Removing SSL renegotiation (Was: Should we back-patch SSL renegotiation fixes?) (Andres Freund <andres@anarazel.de>) |
| Ответы |
Re: Re: Removing SSL renegotiation (Was: Should we
back-patch SSL renegotiation fixes?)
|
| Список | pgsql-hackers |
On Sat, Jul 11, 2015 at 9:28 PM, Andres Freund <andres@anarazel.de> wrote:
On 2015-07-11 21:09:05 +0900, Michael Paquier wrote:
> Something like the patches attached
Thanks for that!
> could be considered, one is for master
> and REL9_5_STABLE to remove ssl_renegotiation_limit, the second one for
> ~REL9_4_STABLE to change the default to 0.
> diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
> index c669f75..16c0ce5 100644
> --- a/doc/src/sgml/config.sgml
> +++ b/doc/src/sgml/config.sgml
> @@ -1040,7 +1040,7 @@ include_dir 'conf.d'
> cryptanalysis when large amounts of traffic can be examined, but it
> also carries a large performance penalty. The sum of sent and received
> traffic is used to check the limit. If this parameter is set to 0,
> - renegotiation is disabled. The default is <literal>512MB</>.
> + renegotiation is disabled. The default is <literal>0</>.
I think we should put in a warning or at least note about the dangers of
enabling it (connection breaks, exposure to several open openssl bugs).
This sounds like a good idea to me. Here is an idea:
+ <warning>
+ <para>
+ Enabling <varname>ssl_renegotiation_limit</> can cause various
+ problems endangering the stability of a <productname>PostgreSQL</>
+ instance like connection breaking suddendly and exposes the
+ server to bugs related to the internal implementation of renegotiation
+ done in the SSL libraries used.
+ </para>
+ </warning>
Attached is v2 for ~9.4.
Regards,
--
Michael
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