Re: [TLS] [CAUTION] Re: Fwd: New Version Notification for draft-moriarty-tls-oldversions-diediedie-00.txt
Kathleen Moriarty <kathleen.moriarty.ietf@gmail.com> Wed, 11 July 2018 16:39 UTC
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From: Kathleen Moriarty <kathleen.moriarty.ietf@gmail.com>
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Date: Wed, 11 Jul 2018 12:39:16 -0400
Cc: Andrei Popov <Andrei.Popov=40microsoft.com@dmarc.ietf.org>, "<tls@ietf.org>" <tls@ietf.org>
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To: mrex@sap.com
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Subject: Re: [TLS] [CAUTION] Re: Fwd: New Version Notification for draft-moriarty-tls-oldversions-diediedie-00.txt
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Sent from my mobile device > On Jul 10, 2018, at 4:31 PM, Martin Rex <mrex@sap.com> wrote: > > 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, Do you want to add a PR with this unless further verification is needed? Thank you, Kathleen > > -Martin > > _______________________________________________ > TLS mailing list > TLS@ietf.org > https://www.ietf.org/mailman/listinfo/tls
- 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