From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.gmx.net (mout.gmx.net [212.227.17.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 7D1B03B2A4 for ; Fri, 19 Mar 2021 04:56:25 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1616144183; bh=3zmjmZg32dhpj5uvw1Zj5l9Ki+FLf2jvmsCnZ/Pd3sw=; h=X-UI-Sender-Class:Subject:From:In-Reply-To:Date:Cc:References:To; b=XEKent0QAnAnUh79TRqZwGhp7GsD6VUDHTUG+mTvMFx/yUZQ0CH3qdycTbSIdZK6o 8g5e6lZb4lOJPainPe7cnLeE14Gmj4OkqGEy90Jz8uIfKDgkKUVVUL7gfYBCuOP40u ZcD0sQpdN1UOSFCB3EOtQPswCgS/4kqrYf4yErqM= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from [192.168.250.106] ([134.76.241.253]) by mail.gmx.net (mrgmx104 [212.227.17.168]) with ESMTPSA (Nemesis) id 1MsYux-1lhsFA1lCl-00u1dz; Fri, 19 Mar 2021 09:56:23 +0100 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.17\)) From: Sebastian Moeller In-Reply-To: Date: Fri, 19 Mar 2021 09:56:22 +0100 Cc: =?utf-8?Q?Dave_T=C3=A4ht?= , ECN-Sane Content-Transfer-Encoding: quoted-printable Message-Id: <42F85394-FF4B-48BF-89B1-082D97CFA76C@gmx.de> References: To: Pete Heist X-Mailer: Apple Mail (2.3445.104.17) X-Provags-ID: V03:K1:DGexljEir3zUzFN1uBs6NHKLWV1nhT7JJdkahxR5vQFZcJ3Ps/3 vEmVVW9bz0BaSL8KsPXghxTwhvnkTzeoEO27UQ1PDTqCJa5/Zjgec59lA0Ujl9sEnPQsRJR Dviz7v/HftdiUwBHsFBasWj/H9u/ZN/u+ocAxDYr1rlTSA4cqar1rG0PFRw6yrKOavgOaMY vJCewS4p25acWknYa/gnw== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:gg8TNLaENsk=:+gvvDoU7GFJDJLx+Xroqtf SbEz9d0AeEFJbXI/qHxuXMpC1YWxUbX8cuvx+T+fxt5UQAcXLRCE8piQvSOZ0OxeLgekasLRP d6p+2YTlydsUeLVNmLY6MlUhhG4YHjEix3GwPeFPFzPiGEJM3QDOYndHSAu8qKCwcT7fYqrOW 8YFno1aexXvoY5Yi1ZilJAIjI/TqITEqJqcMAMzGBTg0aHWx7CMAkf5LOuKmMv65Fdl1VMxjc roWAY0GwWkCg2XXPWQczX9lIU1ynJdum8KsNZnp707c2gEWgg4IJuE6rtq1lazBXtHF5VAQn/ eqUUsjF+OTQIbClb2a6ZZxUApakYRvWzpKL8zAhy9NU9JjRnXny585gqFVT/iaRwKZIky4fgl tk4XuztrD3TQCpQkNqGBDHN/oTWrxGsDcQvvl+0KC7QMdxPD6ZnVZBK8nA99Mi37j6/nj+7OQ LKJ+cC1x/3Q5sRfQDNCadKLtAhUADsIuu3xfYg8DDC5ihkiStaCRpNSIv7yHLJCpYMMe2uw1E jEg14V4cnvSkODQ97R2WHdGBwGKIOpj+oUmipTlxNZi8LjNVGV3uBwNnoLZk3FsigXCVwnpYp /qpiCtJd7q+YfAmNJppNOcxdWrRx8KpK05OQRGV2yf1FJwR17pZVQWpVgXEtGXFsAzz36DzLV OlZMTb9YEkwOC5h1KSVhIn5MbUg6h3jtcsqNnhOZT3SuGd3ZLXSYUAPw+0GwfQzBADyZI0Pgk 4h9o+sky4K2GIhzJQ8KngUwz055ttjH0b/oOxFyFbmNW4p90XB08HpmZ02Gau7TGNJVmChRqN X3xkB1W8x3QNgi5FJWA1fgiG62Ktb5KqFS+niDnzpTQxGSUeLLcCOz0wXNYnP1j/nZQqNHxeL PJ/Tc1tvB+oHS8yF2r8A== Subject: Re: [Ecn-sane] mosh ecn bits washed out X-BeenThere: ecn-sane@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Discussion of explicit congestion notification's impact on the Internet List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 19 Mar 2021 08:56:25 -0000 Hi Pete, > On Mar 19, 2021, at 09:25, Pete Heist wrote: >=20 > Meaning, the negotiation succeeds and ECT(0) is set going up, but > zeroed on packets by the time they come down? >=20 > The negotiation can also be blocked with iptables --ecn-tcp-remove, > which just zeroes out ECE and CWR, preventing negotiation > (https://git.netfilter.org/iptables/tree/extensions/libipt_ECN.c), but > I doubt that's very commonly done. Oh, that looks interesting, probably not too hard to extend this = to also allow to selectively only re-map ECT(1) and or ECT(0). I wonder = what TCP Prague would do if its ECT(1) flows are switched to ECT(0) in = transit? =09 Best Regards Sebastian >=20 > On Thu, 2021-03-18 at 13:00 -0700, Dave Taht wrote: >> mosh, which has long had excellent support for ecn, appears to be >> getting the >> ecn bit washed out along my path from california to england. >>=20 >> ecn survives up that way, but not down. >>=20 >> Just a single data point thus far. >>=20 >=20 >=20 > _______________________________________________ > Ecn-sane mailing list > Ecn-sane@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/ecn-sane