[CentOS] Shrew Soft VPN Client for CentOS 6

Fri Feb 24 23:27:36 UTC 2012
Les Mikesell <lesmikesell at gmail.com>

On Fri, Feb 24, 2012 at 4:30 PM, David G. Miller <dave at davenjudy.org> wrote:
>> I think I'd try tcpdump, or some other tool, and see what's happening.
> I ran tcpdump on my gateway's interface to the the 'net while running a ping on
> the client.  I could see what I'm pretty sure were the ping returns (hard to
> tell since it's VPN traffic).  I'll move the tcpdump to watching what goes from
> the gateway to the VPN client although the VPN traffic will then be mixed in
> with any other non-VPN traffic between the client and my gateway.  I can cut
> back on this traffic but I can't stop it or filter it the way I cann at the
> gateway's exterior NIC.

Does the VPN create its own tun interface?  If so tcpdump should be
able to see the decrypted packets entering and leaving there.

  Les Mikesell
    lesmikesell at gmail.com