From owner-freebsd-questions@FreeBSD.ORG Thu Sep 25 14:47:28 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 656B326D for ; Thu, 25 Sep 2014 14:47:28 +0000 (UTC) Received: from mail-pd0-x22f.google.com (mail-pd0-x22f.google.com [IPv6:2607:f8b0:400e:c02::22f]) (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 376DD8C4 for ; Thu, 25 Sep 2014 14:47:28 +0000 (UTC) Received: by mail-pd0-f175.google.com with SMTP id v10so9726462pde.6 for ; Thu, 25 Sep 2014 07:47:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :message-id:references:to; bh=lK+Ca+lmUFphMLTKfLrMKWLeyAtXnIK9irT/QhgIU6k=; b=idqHh7ZayrOwwdBuYdeVu2SNo41zjxQy5AVK0G7RyvMkcq9EX18lgNh9yjh9zuPwLh qdLWVei/n3dzQF/g0q3+4NGWN9h1SaPHla94ge7N0KF7nHnpNZYpQRQdEWAsGk3Dknc0 tPNOlES1U3AT8vcBzCY+APR2O4GOaMGvtiWfp1vCAkJDtB4JgqEw2Xjx4eTfz4r/LYK0 8enVMle5/XCxN/bWsaVPov/EpVZ42ng9E/cQNivez2BsLnSAKGSNQVBp0nFm6zFw/9Mz jaJ9//1UTPCYB6bAMWHFxXdM1DZkLVFp84oCy+jIsQOyPcWx165wPtCkpIwlH53/6o0q mhEw== X-Received: by 10.68.252.138 with SMTP id zs10mr18555450pbc.13.1411656447771; Thu, 25 Sep 2014 07:47:27 -0700 (PDT) Received: from [127.0.0.1] ([107.170.252.67]) by mx.google.com with ESMTPSA id bf2sm2436642pbb.13.2014.09.25.07.47.23 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 25 Sep 2014 07:47:26 -0700 (PDT) Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) Subject: Re: VPN client cannot receive packets From: Zhi-Qiang Lei In-Reply-To: <542424A2.6080408@gmx.de> Date: Thu, 25 Sep 2014 22:47:13 +0800 Message-Id: <2330161C-FA96-4843-AEDA-376344483D61@gmail.com> References: <6AF0AAAB-E7F2-4FA7-81E5-223DA924DDE1@gmail.com> <542424A2.6080408@gmx.de> To: lokadamus@gmx.de X-Mailer: Apple Mail (2.1878.6) Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.18-1 Cc: freebsd-questions@freebsd.org 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 14:47:28 -0000 Hi, It is my router/firewall with internet connection. This time I try to list the packets from 8.8.8.8, but there are none. root@freebsd-7638:~ # tcpdump src 8.8.8.8 tcpdump: verbose output suppressed, use -v or -vv for full protocol = decode listening on vtnet0, link-type EN10MB (Ethernet), capture size 65535 = bytes Now the question URL is changed. = http://serverfault.com/questions/631260/freebsd-l2tp-vpn-connection-error Best regards, Zhi-Qiang Lei zhiqiang.lei@gmail.com On Sep 25, 2014, at 10:20 PM, lokadamus@gmx.de wrote: > On 25.09.2014 08:48, Zhi-Qiang Lei wrote: >=20 >> I setup a L2TP/IPsec VPN as this article: >>=20 >> http://wiki.stocksy.co.uk/wiki/L2TP_VPN_in_FreeBSD >>=20 >> My problem is that the connected clients cannot receive packets, = however, sending is okay. >>=20 >> Here are the tcpdump results if I tried to ping 8.8.8.8: >>=20 >> 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 >>=20 >> What could be wrong? And how can I troubleshoot? You may reply on = SuperUser if you want, thanks in advance. >>=20 >> http://superuser.com/questions/816485/cannot-receive-packets >>=20 >> Best regards, >> Zhi-Qiang Lei >> zhiqiang.lei@gmail.com >>=20 >> _______________________________________________ >> freebsd-questions@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-questions >> To unsubscribe, send any mail to = "freebsd-questions-unsubscribe@freebsd.org" >>=20 > Hi, >=20 > Is this your router/ firewall with internet connection? > Look with tcpdump for traffic at 8.8.8.8. > So you can see, if traffic comes back or is missing before your vpn = system. >=20 >=20 > Best regards >=20