Iptables for load balancing

Main rules

 Rule one ：（ There is something wrong with the verification ）
iptables -t nat -I PREROUTING -p tcp -d 192.168.200.154/24 --dport 80 -m statistic --mode random --probability 0.5 -j DNAT --to-destination 192.168.200.157:80
 
iptables -t nat -I PREROUTING -p tcp -d 192.168.200.154/24 --dport 80 -j DNAT --to-destination 192.168.200.158:80


 Rule 2 ：（ Verification is OK ）
iptables -t nat -A PREROUTING -d 192.168.200.154 -p tcp --dport 80 -m statistic --mode nth --every 2 --packet 0 -j DNAT --to-destination 192.168.200.157:80
iptables -t nat -A POSTROUTING -s 192.168.200.157 -p tcp --sport 80 -j SNAT --to-source 192.168.200.154
 
iptables -t nat -A PREROUTING -d 192.168.200.154 -p tcp --dport 80 -j DNAT --to-destination 192.168.200.158:80
iptables -t nat -A POSTROUTING -s 192.168.200.158 -p tcp --sport 80 -j SNAT --to-source 192.168.200.154

Test results （ Rule 2 ）

• The screenshot of network configuration is as follows ：

• Two nginx Services are bound with two virtual IP Here's the picture ：

•   Add the corresponding rule as follows ：

Pictured above , Just after adding rules, the packets on the connection are 0.

• visit 10 Pages are shown in the figure below ：

•   The connection will be loaded into two rule chains , Here's the picture ：