You are missing a kernel module so that is definitely a problem. I suggest you read this:
http://www.smallnetbuilder.com/forums/showthread.php?t=12916


On 11/3/2013 4:30 AM, Luka wrote:
Thanks for suggestion.
I'm running vpn server on a asus router (RT-AC66U, custom FW - Merlin build) and "ip forward" is already enabled

cat /proc/sys/net/ipv4/ip_forward

1


If I execute iptables command, I get:

iptables -A POSTROUTING -t NAT -j SNAT --to-source 192.168.0.10

iptables v1.3.8: can't initialize iptables table `NAT': Table does not exist (do you need to insmod?)

Perhaps iptables or your kernel needs to be upgraded.


Looks like I'm missing some modules.
I've checked NAT Passthrough settings in router administration console and it's enabled for:
PPTP Passthrough
L2TP Passthrough
IPSec Passthrough
RTSP Passthrough
H.323 Passthrough
SIP Passthrough

Any other suggestions ?

Another thing, when I start ipsec, I get following message:

 ipsec start

Starting strongSwan 5.0.4 IPsec [starter]...

'/lib/modules/2.6.22.19/kernel/net/ipv4/xfrm4_tunnel.ko <http://2.6.22.19/kernel/net/ipv4/xfrm4_tunnel.ko>': unknown symbol in module, or unknown parameter


But server starts anyway. Should I ignore this error ?

L



On Sun, Nov 3, 2013 at 5:20 AM, Lawrence Chiu <[email protected] <mailto:[email protected]>> wrote:

    I had a similar problem when I got started with Strongswan.  I
    could connect to the VPN, but couldn't browse anything.  I fixed
    it with this:
    
http://superuser.com/questions/648283/strongswan-ipsec-vpn-for-windows-7-road-warrior-config



    On 11/2/2013 1:32 PM, Luka wrote:
    Hi.
    Can someone help me with strong swan configuration. I would like
    to access home network from my iPhone.
    I've setup config(certificates, etc...), following this guide:
    http://wiki.strongswan.org/projects/strongswan/wiki/IOS_(Apple)
    <http://wiki.strongswan.org/projects/strongswan/wiki/IOS_%28Apple%29>

    I can connect to VPN from iPhone, but I can't access home network
    or internet.
    My home network has following settings:
    Subnet mask: 255.255.255.0
    Router ip(local ip of vpn server): 192.168.2.1
    Other devices ip range is 192.168.2.X
    ipsec.conf file:

    conn ios

        keyexchange=ikev1

        authby=xauthrsasig

        xauth=server

        left=%defaultroute

        leftsubnet=0.0.0.0/0 <http://0.0.0.0/0>

        leftcert=serverLupoCert.pem

        right=%any

        rightsubnet=10.0.0.0/24 <http://10.0.0.0/24>

        rightsourceip=10.0.0.2

        rightcert=clientCert.pem

        auto=add


    I probably need to change left/right subnet and source IPs ?


    Thanks



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