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Re: SSL bump working on most site...cert pinning issue?

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On 2014-06-30 07:13, Dan Charlesworth wrote:
No worries.

Sounds like this is the feature you should be waiting with baited
breath for: http://wiki.squid-cache.org/Features/SslPeekAndSplice

I’m not a developer so I have no idea how far along that is right now.

On 30 Jun 2014, at 11:05 pm, James Lay <jlay@xxxxxxxxxxxxxxxxxxx> wrote:

On Mon, 2014-06-30 at 22:56 +1000, Dan Charlesworth wrote:
Yeah, pinned SSL ‘aint gonna be bumped. The Twitter apps are another popular one that use pinning.

As far as your broken_sites ACL goes, you can’t use `dstdomain` because the only thing Squid can see of the destination before bumping an intercepted connection is the IP address. So for `ssl_bump none` you’ll need to be use `dst` ACLs instead.

ProTip: Here are the Apple and Akamai public IP blocks (to use in a dst equivalent of your broken_sites), respectively: 17.0.0.0/8, 23.0.0.0/12.

Good luck

On 30 Jun 2014, at 10:38 pm, James Lay <jlay@xxxxxxxxxxxxxxxxxxx> wrote:

Topic pretty much says it...most sites work fine using my below set up, but some (Apple's app store) do not. I'm wondering if cert pinning is the issue? Since this set up is basically two separate sessions, I packet captured both. The side the I have control over gives me a TLS Record Layer Alert Close Notify. I am unable to decrypt the other side as the device in question is an iDevice and I can't capture the master
secret.

I've even tried to ACL certain sites to not bump, but they don't go
through.  Below is my complete setup.  This is running the below:


Ah good catch thank you.  I've seen expensive proxy appliances just
tunnel the traffic through, but they get the host and domain name to all control...which is really all I'm wanting to do is control what sites
are allowed.  I'll give your suggestions a go...thank you.

James


Thanks Dan..looks like that's what I'll be watching for.

James




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