#Разрешаем всем доступ в Интернет
sudo iptables -v -t nat -A POSTROUTING -s 192.168.0.0/24 -j MASQUERADE
	
#очищаем все правила iptables
iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X
iptables -P INPUT ACCEPT
iptables -P OUTPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -t nat -F POSTROUTING
#разрешаем 10-11-12 
sudo iptables -v -t nat -A POSTROUTING -s 192.168.0.10/32 -j MASQUERADE
sudo iptables -v -t nat -A POSTROUTING -s 192.168.0.11/32 -j MASQUERADE
sudo iptables -v -t nat -A POSTROUTING -s 192.168.0.12/32 -j MASQUERADE
	
iptables -A OUTPUT -d rambler.ru  -j ACCEPT
iptables -A INPUT -d rambler.ru  -j ACCEPT
iptables -A FORWARD -d rambler.ru  -j ACCEPT
	
Chain INPUT (policy ACCEPT 19 packets, 1675 bytes)
 pkts bytes target     prot opt in     out     source               destination
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            81.19.82.8
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            81.19.82.9
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            81.19.82.10
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            81.19.82.11

Chain FORWARD (policy ACCEPT 220 packets, 121K bytes)
 pkts bytes target     prot opt in     out     source               destination
    9   512 ACCEPT     all  --  *      *       192.168.0.0/24       10.0.0.0/8
    6   246 ACCEPT     all  --  *      *       10.0.0.0/8           192.168.0.0/24
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            81.19.82.9
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            81.19.82.10
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            81.19.82.11
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            81.19.82.8

Chain OUTPUT (policy ACCEPT 18 packets, 2340 bytes)
 pkts bytes target     prot opt in     out     source               destination
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            81.19.82.8
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            81.19.82.9
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            81.19.82.10
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            81.19.82.11
	
root@gate:~# iptables -nvL -t nat
Chain PREROUTING (policy ACCEPT 1706 packets, 197K bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain INPUT (policy ACCEPT 211 packets, 20402 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain OUTPUT (policy ACCEPT 180 packets, 10525 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain POSTROUTING (policy ACCEPT 589 packets, 39909 bytes)
 pkts bytes target     prot opt in     out     source               destination
    8   416 MASQUERADE  all  --  *      *       192.168.0.11        0.0.0.0/0
    0     0 MASQUERADE  all  --  *      *       192.168.0.12         0.0.0.0/0
    6   312 MASQUERADE  all  --  *      *       192.168.0.13         0.0.0.0/0