root@OpenWrt:~# ip -4 route show table all
0.0.0.0/1 via 10.3.7.1 dev tun0
default via 109.91.76.1 dev eth0.2 proto static src 109.91.78.187
10.3.7.0/24 dev tun0 proto kernel scope link src 10.3.7.252
85.17.28.145 via 109.91.76.1 dev eth0.2
109.91.76.0/22 dev eth0.2 proto kernel scope link src 109.91.78.187
128.0.0.0/1 via 10.3.7.1 dev tun0
192.168.1.0/24 dev br-lan proto kernel scope link src 192.168.1.1
broadcast 10.3.7.0 dev tun0 table local proto kernel scope link src 10.3.7.252
local 10.3.7.252 dev tun0 table local proto kernel scope host src 10.3.7.252
broadcast 10.3.7.255 dev tun0 table local proto kernel scope link src 10.3.7.252
broadcast 109.91.76.0 dev eth0.2 table local proto kernel scope link src 109.91.78.187
local 109.91.78.187 dev eth0.2 table local proto kernel scope host src 109.91.78.187
broadcast 109.91.79.255 dev eth0.2 table local proto kernel scope link src 109.91.78.187
broadcast 127.0.0.0 dev lo table local proto kernel scope link src 127.0.0.1
local 127.0.0.0/8 dev lo table local proto kernel scope host src 127.0.0.1
local 127.0.0.1 dev lo table local proto kernel scope host src 127.0.0.1
broadcast 127.255.255.255 dev lo table local proto kernel scope link src 127.0.0.1
broadcast 192.168.1.0 dev br-lan table local proto kernel scope link src 192.168.1.1
local 192.168.1.1 dev br-lan table local proto kernel scope host src 192.168.1.1
broadcast 192.168.1.255 dev br-lan table local proto kernel scope link src 192.168.1.1
At the beginning I had problems, because I activated kill switch.
(Disable kill switch: Edit firewall rule "lan" and check "Allow forward to destination zones:" WAN WAN6)