[squid-users] Safari 9 vs. SSL Bump

Dan Charlesworth dan at getbusi.com
Wed Oct 14 00:13:30 UTC 2015

Throwing this out to the list in case anyone else might be trying to get SSL Bump to work with the latest version of Safari.

Every other browser on OS X (and iOS) is happy with bumping for pretty much all HTTPS sites, so long as the proxy’s CA is trusted. 

However Safari throws generic “secure connection couldn’t be established” errors for many popular HTTPS sites in including:
- wikipedia.org
- mail.google.com
- twitter.com
- github.com

But quite a number of others work, such as youtube.com.

This error gets logged to the system whenever it occurs:
com.apple.WebKit.Networking: NSURLSession/NSURLConnection HTTP load failed (kCFStreamErrorDomainSSL, -9802)

Apparently this is related to Apple’s new “App Transport Security” protections, in particular, the fact that “the server doesn’t support forward secrecy”. Even though it doesn’t seem to be affecting mobile Safari on iOS 9 at all.

It’s also notable that Safari seems perfectly happy with legacy server-first SSL bumping. 

I’m using Squid 3.5.10 and this is my current config: https://gist.github.com/djch/9b883580c6ee84f31cd1

Anyone have any idea what I can try?

More information about the squid-users mailing list