VPN client cannot receive packets

[lokadamus at gmx.de]

On 25.09.2014 08:48, Zhi-Qiang Lei wrote:

> 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 at 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 at gmail.com
>
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>
Hi,

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.


Best regards