Connection does not route through the iot

Hi, I've compiled a Yocto build that extends the meta-iot2000-example with the openVPN recipe and seems to work fine. I've generated all the needed config files (everything that concerns certificates and config file) on my host machine, tested on a Raspberry and copied to "/etc/openvpn/" inside the iot2040.

The IoT2040 is connected to a router through Ethernet (the right port, X2P1LAN) with dhcp active and able to ping the internet (tried with google.com). I've found that the openvpn service was already enabled, so I haven't changed anything inside /etc/init.d/

When I try to open a client connection with the iot, it seems to start fine, but the connection does not route through the iot and the result is that I cannot ping or dig anything: they just do not produce any output.

I've got this option in my client configuration file (which I know it should means that any connection on my host machine should be routed to the IoT): 

redirect-gateway def1

and this in the server configuration file:

push "block-outside-dns"

push "dhcp-option DNS 8.8.8.8"

push "dhcp-option DNS 8.8.4.4"

push "comp-lzo no"

push "route 192.168.1.0 255.255.255.0"

 I've uncommented this line in /etc/sysctl.conf on the IoT:

 net/ipv4/ip_forward=1

The exact same configuration files and procedure works flawlessly on my Raspberry.

Thanks to anyone that could give me an help! 

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Split from OpenVPN on IOT2040.

Hi, thanks for the quick response!

From the other post, I though that this line should let me make some progress:

iptables -A FORWARD -i eth1 -j ACCEPT 

but nothing.

Then I've tried with this too (after a reboot), without expecting anything because I though that masquerading was something that I don't need (I've understood that it should be needed only when facing with multiple local networks with the same IP ranges, e.g. both on 192.168.1.0/24):

iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE

 but it worked!

So, summing up, my problem is solved with just this single line, thanks!

One last thing: how can I make this changes persistent? I've tried with this without luck:

iptables-save > /etc/iptables/iptables.rules