From owner-freebsd-questions@FreeBSD.ORG Thu Sep 25 06:48:12 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 92546BCE for ; Thu, 25 Sep 2014 06:48:12 +0000 (UTC) Received: from mail-pd0-x230.google.com (mail-pd0-x230.google.com [IPv6:2607:f8b0:400e:c02::230]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 5AA1BAFC for ; Thu, 25 Sep 2014 06:48:12 +0000 (UTC) Received: by mail-pd0-f176.google.com with SMTP id z10so8731212pdj.35 for ; Wed, 24 Sep 2014 23:48:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:content-type:subject:message-id:date:to:mime-version; bh=4YDwFkiZ2IoC3gYHzFa3i1vknF27X25jXDgO3tlKkIA=; b=iCGi2YYZagl9Gd/S+ctMOSF/B07JI7E83xwlnfZVh/qLrUMdWmJ/xoTlAMUDPOo5wh vFvgp2OF0EvP750nU5+PRXax6zhnm0vPsNhaIOGQX45pvJoydpS4J6dXO70ZOAVC/Vcy 5rc4O6CtECHkfxo4AccKZ2/b+uDk+c6lmysUYgakIsX+7llys6rhwb88PP+S3l9puJZY JpllxJU9ybGK45s9Om1vrUPRSFglEA9NkpjpPR66JBzDX+bcfhBQIxZoRtSp13qYMYDx 0HFFU/BGaDV73w/1BSPa+tauvpqaOV/ZgNAG9rIOl4X+0iemCoJY2Z6D1pP1YOZrYBBL 3auQ== X-Received: by 10.68.69.79 with SMTP id c15mr2389314pbu.166.1411627691863; Wed, 24 Sep 2014 23:48:11 -0700 (PDT) Received: from [127.0.0.1] ([107.170.252.67]) by mx.google.com with ESMTPSA id hz4sm1159815pbc.22.2014.09.24.23.48.08 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 24 Sep 2014 23:48:10 -0700 (PDT) From: Zhi-Qiang Lei Subject: VPN client cannot receive packets Message-Id: <6AF0AAAB-E7F2-4FA7-81E5-223DA924DDE1@gmail.com> Date: Thu, 25 Sep 2014 14:48:01 +0800 To: freebsd-questions@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) X-Mailer: Apple Mail (2.1878.6) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.18-1 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Sep 2014 06:48:12 -0000 I setup a L2TP/IPsec VPN as this article: http://wiki.stocksy.co.uk/wiki/L2TP_VPN_in_FreeBSD My problem is that the connected clients cannot receive packets, = however, sending is okay. Here are the tcpdump results if I tried to ping 8.8.8.8: root@freebsd-7638:~ # tcpdump -i vtnet0 icmp tcpdump: verbose output suppressed, use -v or -vv for full protocol = decode listening on vtnet0, link-type EN10MB (Ethernet), capture size 65535 = bytes 05:55:17.630770 IP 192.168.99.150 > google-public-dns-a.google.com: ICMP = echo request, id 36697, seq 0, length 64 05:55:18.627825 IP 192.168.99.150 > google-public-dns-a.google.com: ICMP = echo request, id 36697, seq 1, length 64 05:55:19.624058 IP 192.168.99.150 > google-public-dns-a.google.com: ICMP = echo request, id 36697, seq 2, length 64 05:55:20.618946 IP 192.168.99.150 > google-public-dns-a.google.com: ICMP = echo request, id 36697, seq 3, length 64 05:55:21.622551 IP 192.168.99.150 > google-public-dns-a.google.com: ICMP = echo request, id 36697, seq 4, length 64 What could be wrong? And how can I troubleshoot? You may reply on = SuperUser if you want, thanks in advance. http://superuser.com/questions/816485/cannot-receive-packets Best regards, Zhi-Qiang Lei zhiqiang.lei@gmail.com