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On 22/11/2014 3:57 a.m., Sebastian Fohler wrote:
> I've disabled SSLv3 with this option set in my squid.conf file:
>
> sslproxy_options NO_SSLv3 NO_SSLv2
>
> But despite that fact, the squid proxy accepted the configuration
> without any problems, I still get SSLv3 connections working. I've
> sniffed the traffice on that interface on the proxy port and if I
> do a SSLv3 connection from the browser and do a poodle check, the
> sniffing protocol shows an established SSLv3 connection.
The connection between browser and Squid is controlled by the *_port
settings.
sslproxy_* directives are purely for DIRECT or ORIGINAL_DST server
connections.
>
> Can someone tell me if I missed something here?
The sslproxy_options setting is an OpenSSL format string. Which is a
list of comma (',') or colon (':') separated OpenSSL option names.
What you need to configure is something like these:
# to prevent SSL on inbound traffic
https_port ... options=NO_SSLv3:NO_SSLv2
http_port ... ssl-bump options=NO_SSLv3:NO_SSLv2
# to prevent SSL on direct server traffic
sslproxy_options NO_SSLv3:NO_SSLv2
# to prevent SSL on relayed peer connections
cache_peer ... ssloptions=NO_SSLv3:NO_SSLv2
> Is there some option which could override the sslproxy_options
> setting?
If anything the OpenSSL library configuration may have such options.
But AFAIK that is for configuring the defaults and squid.conf settings
are overriding them.
> How can I check if the sslproxy_options are really being used?
Good question. I'm not aware of anything in particular. If there is an
SSL/TLS testing website connecting to it through Squid should tell you.
Amos
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