Skype breaks too. They also send non-SSL bytes and then SSL.
On Fri, Mar 11, 2011 at 3:17 PM, Jason Haar <jason.h...@trimble.co.nz> wrote:
> On 03/12/2011 10:34 AM, Vineet Kumar wrote:
>> BlueCoat's ProxySG is one that runs tranparent SSL protocol detection
>> and breaks if openvpn traffic is coming in via 443. This proxy is able
>> to pass through other non-HTTP pure SSL traffic though and not just
>> HTTPS.
>
> A bit off-topic, but do you know if Skype works through that proxy?
> Skype falls back to attempting connections over port 443 if it can't get
> others to work, and as it is primarily a UDP-based product - like
> openvpn - I've always wondered if their "port 443" traffic was true SSL
> or just some other encrypted "skype protocol".
>
> i.e. if an organization has a policied BlueCoat transparent HTTPS proxy,
> and general egress filtering, does Skype work?
>
>
> --
> Cheers
>
> Jason Haar
> Information Security Manager, Trimble Navigation Ltd.
> Phone: +64 3 9635 377 Fax: +64 3 9635 417
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>
>
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