[Openswan Users] tcpdump no outgoing traffic over VPN

alexk alexk at coolsigns.mobi
Wed Jan 4 08:17:49 EST 2017

Hello to all and happy new year.

I am trying to acquire a tcp dump in a pcap file using the following 

/sudo tcpdump -s 0 host HOST_IP -i eth0 -w tcpdump_test.pcap/

The OS is _/Ubuntu 14.04/_ server edition with the */3.13.0-92-generic/* 
kernel running on an AWS instance.

I am able to capture incoming traffic from the host to my server but 
when I download the pcap file and open it in Wireshark I do not see the 
outgoing traffic (neither ESP packets nor clear text).

I have tried to use  nflog as described in 
but it seems that nflog is not included with the Ubuntu kernel. I am 
unable to find a way to see outgoing traffic towards the host in question.

Can anyone please suggest a solution?

Thank you in advance


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