On Wed, 3 Dec 2014, Darren Share wrote:

late reply, message was lost in the inbox.....

FYI, I have also posted this on Server Fault. I am trying to establish an ipsec 
VPN from a Draytek router on the edge of our corporate
network to a VPS on Digital Ocean. I've set up the VPN on the VPS using this 
script -
https://github.com/philplckthun/setup-simple-ipsec-l2tp-vpn - on an Ubuntu 
14.04 machine. I believe the script downloads and installs

That seems to be for L2TP/IPsec, not plain IPsec.

conn vpnpsk
 connaddrfamily=ipv4
 auto=add
 left=178.62.73.215
#  leftid=178.62.73.215
#  leftsubnet=178.62.73.215/32
 leftsubnet=10.10.10.0/24
#  leftnexthop=%defaultroute
 leftnexthop=%direct
 leftprotoport=17/1701
 rightprotoport=17/%any
#  right=%any
 right=10.111.1.0/24
 rightsourceip=10.111.1.1
 leftsourceip=10.10.10.1
#  rightsubnetwithin=0.0.0.0/0

You seem to mean to build a net-to-net from 10.10.10.0/24 to 10.111.1.0/24 ?

Your "right" should be the actual public IP of the server on that end,
of if responding only (because the other end is behind NAT) %any.
rightsubnet= should contain 10.111.1.0/24 instead.

You should NOT configure left/rightprotoport because that's for
transport mode host-to-host L2TP/IPsec only!

You should also not need leftnexthop=%direct or rightsourceip=10.111.1.1


 forceencaps=yes
 authby=secret
 pfs=no

better to do pfs=yes if possible.

 type=transport

and you will need type=tunnel

Paul
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