iptables -t nat -A POSTROUTING -m iprange --src-range 10.8.0.100-10.8.0.254 -o eth0 -j MASQUERADE
iptables -t nat -A POSTROUTING -m iprange --src-range 10.8.0.100-10.8.0.254 -o eth0 -j MASQUERADE
iptables -t nat -A POSTROUTING <b>-s 10.8.0.0/24</b> -o eth0 -j MASQUERADE