How to change iptables policy

Question

Hi Guys,

I have my containers in CentOS VM. To expose my containers, I enabled ip_forwarding. But still I am not not able to connect. I searched a lot and came to know iptables is not allowing to connect.

How can I solve this problem?

Thank You

Answer 1

Hi@akhtar,

Docker uses iptables program in background. So along with ip_forwarding you have to change iptables policy.

• Check iptables policy first.

$ iptables -nvL

• Change Forward policy with Forward Accept.

$ iptables -P FORWARD ACCEPT

Hope this will work now.

Thank You