From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Jason@zx2c4.com Received: from krantz.zx2c4.com (localhost [127.0.0.1]) by krantz.zx2c4.com (ZX2C4 Mail Server) with ESMTP id e3798cdc for ; Sat, 14 Apr 2018 22:54:41 +0000 (UTC) Received: from frisell.zx2c4.com (frisell.zx2c4.com [192.95.5.64]) by krantz.zx2c4.com (ZX2C4 Mail Server) with ESMTP id cac2d1b2 for ; Sat, 14 Apr 2018 22:54:41 +0000 (UTC) Received: by frisell.zx2c4.com (ZX2C4 Mail Server) with ESMTP id 40e728fc for ; Sat, 14 Apr 2018 22:45:49 +0000 (UTC) Received: by frisell.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id 0ba19a27 (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128:NO) for ; Sat, 14 Apr 2018 22:45:48 +0000 (UTC) Received: by mail-oi0-f48.google.com with SMTP id z8-v6so11452714oix.2 for ; Sat, 14 Apr 2018 16:09:00 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20180414202029.5f247fba@natsu> References: <20180316142547.2ecb70de@natsu> <20180414024017.GA14470@zx2c4.com> <20180414184018.0166bc48@natsu> <20180414193815.0d0cd039@natsu> <20180414202029.5f247fba@natsu> From: "Jason A. Donenfeld" Date: Sun, 15 Apr 2018 01:08:58 +0200 Message-ID: Subject: Re: Mixed MTU hosts on a network To: Roman Mamedov Content-Type: text/plain; charset="UTF-8" Cc: Luis Ressel , WireGuard mailing list , Roman Mamedov List-Id: Development discussion of WireGuard List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hey Roman, I've just tried a few ways of replicating your setup, and I can't seem to reproduce the bug, either with the new code or old. The results you mention are surprising too, since WireGuard or not, TCP is supposed to negotiate the lowest common MSS. I wonder if some strange iptables rules are getting in the way and confusing things? Jason