VM created in particular host cannot access internet

[dimas yoga pratama]

Hi all,

I have installed Cloudstack with KVM hypervisor in 2 machines. One machine
(A) act as MS and Agent, and the other machine (B) act as an Agent.
I can access the internet from all VMs created in machine B and ping the
VMs from outside, but I can't access the internet from VMs created in
Machine (A). I already set the ingress and egres rule to all VMs.

Is there any misconfiguration in my cloudstack?I'm using basic networking
and in a proxy environment.

Thanks, looking forward for your answer
Dimas.