Chain outbound

[Paul Fontenot <wpfontenot@xxxxxxxxxxx>]

Good afternoon,

How would one force all traffic out of a particular interface? I am 
trying to force all traffic out of a vpn interface but I'm not having 
any luck - if I change the default policy from accept to drop and try 
this block below I get nothing :/

chain output {
                type filter hook output priority 0; policy drop;
                counter
                oif { lo, tun0 } accept
                oif { enp3s0f1, wlp2s0 } ip daddr 192.168.0.0/24 accept
                oif { enp3s0f1, wlp2s0 } drop
                oif { vmnet8 } accept

}

Can I do what I'm trying to do with nftables or should I toss it and go 
back to iptables?

Thanks,

Paul