Hi I have a question about networking on openstack. I try to create 2 network segment using vm ubuntu. It has 2 networking cards 192.168.1.0/24 and 192.168.2.0/24. I configured nat rules using iptables but it doesnt work as i expected. When i try to ping from 192.168.2.0/24 to 192.168.1.0/24 network, ubuntu server gets packet but cannot forward the other site ? I googled but cannot find any solution. So how can i configure nat properly on ubuntu vm ? I configured the sysctl for ip_forwarding and iptables rules.
I can verify that ping packet from Machine2 reaches the Machine1 but Machine2 ping reply doesn't come to Machine1. The reply packet come to Ubuntu's interface 192.168.1.5 but the nat rule does not work. Below is the rules i did. eth0 external network, eth1 internal network. echo 1 > /proc/sys/net/ipv4/ip_forward iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE iptables -A FORWARD -i eth0 -o eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT iptables -A FORWARD -i eth1 -o eth0 -j ACCEPT Best regards [image: Satır içi resim 2]
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