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Date:      Thu, 25 Sep 2014 14:48:01 +0800
From:      Zhi-Qiang Lei <zhiqiang.lei@gmail.com>
To:        freebsd-questions@freebsd.org
Subject:   VPN client cannot receive packets
Message-ID:  <6AF0AAAB-E7F2-4FA7-81E5-223DA924DDE1@gmail.com>

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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




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