Re: [TLS] [CAUTION] Re: Fwd: New Version Notification for draft-moriarty-tls-oldversions-diediedie-00.txt
mrex@sap.com (Martin Rex) Tue, 10 July 2018 20:31 UTC
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To: mrex@sap.com
Date: Tue, 10 Jul 2018 22:31:32 +0200
CC: Andrei Popov <Andrei.Popov=40microsoft.com@dmarc.ietf.org>, "<tls@ietf.org>" <tls@ietf.org>
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From: mrex@sap.com
Archived-At: <https://mailarchive.ietf.org/arch/msg/tls/qxREcDsaPGA-wMlGxjAE3-rHgso>
Subject: Re: [TLS] [CAUTION] Re: Fwd: New Version Notification for draft-moriarty-tls-oldversions-diediedie-00.txt
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mrex@sap.com (Martin Rex) wrote: > Andrei Popov <Andrei.Popov=40microsoft.com@dmarc.ietf.org> wrote: >> >> On the recent Windows versions, TLS 1.0 is negotiated more than 10% >> of the time on the client side (this includes non-browser connections >> from all sorts of apps, some hard-coding TLS versions), >> and TLS 1.1 accounts for ~0.3% of client connections. > > "On recent Windows versions" sounds like figure might not account > for Windows 7 and Windows Server 2008R2, about half of the installed > base of Windows, and where the numbers are likely *MUCH* higher. > > When troubleshooting TLS handshake failures, I sometimes trying > alternative SSL/TLS clients on customer machines through remote support, > and it seems when I run this command on a Windows 2012R2 server: > > powershell "$web=New-Object System.Net.WebClient ; $web.DownloadString('https://www.example.com/')" 2>&1 > > it connects with TLSv1.0 only, and this is a client-side limitation. > > To make it use TLSv1.2, I would have to use > > powershell "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12 ; $web=New-Object System.Net.WebClient ; $web.DownloadString('https://www.example.com/')" 2>&1 > > i.e. explicit opt-in. btw. I checked this on a Windows 10 (1709) machine, and it's powershell also tries connecting with TLSv1.0 only. To me, it looks more like 100% of the Microsoft Windows installed base not being ready for a TLSv1.2-only world. -Martin
- Re: [TLS] Fwd: New Version Notification for draft… Stephen Farrell
- Re: [TLS] raising ceiling vs. floor (was: New Ver… Hubert Kario
- Re: [TLS] raising ceiling vs. floor (was: New Ver… Peter Gutmann
- Re: [TLS] raising ceiling vs. floor (was: New Ver… Eric Rescorla
- Re: [TLS] Fwd: New Version Notification for draft… Peter Gutmann
- Re: [TLS] raising ceiling vs. floor (was: New Ver… Eric Rescorla
- Re: [TLS] raising ceiling vs. floor (was: New Ver… Hubert Kario
- [TLS] raising ceiling vs. floor (was: New Version… Viktor Dukhovni
- Re: [TLS] Fwd: New Version Notification for draft… nalini elkins
- Re: [TLS] Fwd: New Version Notification for draft… Martin Thomson
- Re: [TLS] Fwd: New Version Notification for draft… Martin Rex
- Re: [TLS] Fwd: New Version Notification for draft… Eric Rescorla
- Re: [TLS] Fwd: New Version Notification for draft… Eric Rescorla
- [TLS] Fwd: New Version Notification for draft-mor… Kathleen Moriarty
- Re: [TLS] Fwd: New Version Notification for draft… Loganaden Velvindron
- Re: [TLS] Fwd: New Version Notification for draft… Salz, Rich
- Re: [TLS] Fwd: New Version Notification for draft… Salz, Rich
- Re: [TLS] Fwd: New Version Notification for draft… Alessandro Ghedini
- Re: [TLS] Fwd: New Version Notification for draft… Andrei Popov
- Re: [TLS] Fwd: New Version Notification for draft… Eric Mill
- Re: [TLS] raising ceiling vs. floor (was: New Ver… Peter Gutmann
- Re: [TLS] raising ceiling vs. floor (was: New Ver… Viktor Dukhovni
- Re: [TLS] raising ceiling vs. floor (was: New Ver… David Benjamin
- Re: [TLS] raising ceiling vs. floor (was: New Ver… Peter Gutmann
- Re: [TLS] Fwd: New Version Notification for draft… Viktor Dukhovni
- Re: [TLS] raising ceiling vs. floor (was: New Ver… Hubert Kario
- Re: [TLS] raising ceiling vs. floor (was: New Ver… Phil Pennock
- Re: [TLS] raising ceiling vs. floor (was: New Ver… Hubert Kario
- Re: [TLS] Fwd: New Version Notification for draft… Stephen Farrell
- Re: [TLS] [CAUTION] Re: Fwd: New Version Notifica… Martin Rex
- Re: [TLS] raising ceiling vs. floor (was: New Ver… Peter Gutmann
- Re: [TLS] Fwd: New Version Notification for draft… nalini elkins
- Re: [TLS] Fwd: New Version Notification for draft… Stephen Farrell
- Re: [TLS] raising ceiling vs. floor (was: New Ver… Hubert Kario
- Re: [TLS] Fwd: New Version Notification for draft… Eric Rescorla
- Re: [TLS] Fwd: New Version Notification for draft… Salz, Rich
- Re: [TLS] [CAUTION] Re: Fwd: New Version Notifica… Kathleen Moriarty
- Re: [TLS] Fwd: New Version Notification for draft… Kathleen Moriarty
- Re: [TLS] Fwd: New Version Notification for draft… Kathleen Moriarty
- Re: [TLS] Fwd: New Version Notification for draft… David Benjamin
- Re: [TLS] Fwd: New Version Notification for draft… nalini elkins
- Re: [TLS] Fwd: New Version Notification for draft… Eric Rescorla
- Re: [TLS] Fwd: New Version Notification for draft… Stephen Farrell
- Re: [TLS] Fwd: New Version Notification for draft… Christopher Wood
- Re: [TLS] Fwd: New Version Notification for draft… Yaron Sheffer
- Re: [TLS] Fwd: New Version Notification for draft… Hubert Kario
- Re: [TLS] Fwd: New Version Notification for draft… Jeremy Harris
- Re: [TLS] Fwd: New Version Notification for draft… Artyom Gavrichenkov
- Re: [TLS] Fwd: New Version Notification for draft… Stephen Farrell
- Re: [TLS] Fwd: New Version Notification for draft… Artyom Gavrichenkov