From owner-freebsd-current@freebsd.org Sat Jun 4 00:11:35 2016 Return-Path: Delivered-To: freebsd-current@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 48CCBB69F57; Sat, 4 Jun 2016 00:11:35 +0000 (UTC) (envelope-from truckman@FreeBSD.org) Received: from gw.catspoiler.org (unknown [IPv6:2602:304:b010:ef20::f2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "gw.catspoiler.org", Issuer "gw.catspoiler.org" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 2B7DE1849; Sat, 4 Jun 2016 00:11:32 +0000 (UTC) (envelope-from truckman@FreeBSD.org) Received: from FreeBSD.org (mousie.catspoiler.org [192.168.101.2]) by gw.catspoiler.org (8.15.2/8.15.2) with ESMTP id u540BODD045000; Fri, 3 Jun 2016 17:11:28 -0700 (PDT) (envelope-from truckman@FreeBSD.org) Message-Id: <201606040011.u540BODD045000@gw.catspoiler.org> Date: Fri, 3 Jun 2016 17:11:24 -0700 (PDT) From: Don Lewis Subject: VirtualBox network connectivity broken on recent -CURRENT To: freebsd-current@FreeBSD.org, freebsd-emulation@FreeBSD.org MIME-Version: 1.0 Content-Type: TEXT/plain; charset=us-ascii X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 04 Jun 2016 00:11:35 -0000 It looks like something changed in -CURRENT to break network connectivity to VirtualBox guests. This was last known to work with r299139 (May 6th) and is definitely broken with r301229. The VirtualBox port revisions are: virtualbox-ose-4.3.38_1 virtualbox-ose-kmod-4.3.38 It looks like there was one change to the VirtualBox on May 9th, but it looks unlikely to be the cause of the problem. The network settings are: Attached to: Bridged Adapter Name: re0 Adapter Type: Paravirtualized Network (virtio-net) Promiscuous Mode: Deny MAC Address: [snip] Ifconfig says that the interface is up, but I am unable to ping either the host or anything else on the LAN from the guest. It looks like the problem is with outbound traffic. If I attempt to ping the guest, the source IP address and MAC address show up in the guest's arp table, but ping reports: ping: sendto: Host is down That makes me think that the arp responses from the guest are not getting transmitted. None of the machines involved are running firewalls. If I ping from the guest, I don't see any arp requests on the wire and the arp command shows the table entry as incomplete. The problem shows up with both FreeBSD -CURRENT and Debian guests.