i am able to get setup working when net ballancer is turn off.
done with static routes where all trafic (e.g. 188.8.131.52/184.108.40.206 and 0.0.0.0/220.127.116.11) is routed to other side BOND IP.
BUT to set up VPN conection is needed to route, at least, public IP of zeroshell “server” thru ppp interface (3G modem). For one modem connected its working, but how to setup it for two or more modems? eg. route one destination IP thru 2 or more ppp interfaces? ❓