Hello nate, It works now!! Thanks. It's caused by my ipchains rule, I was confused with packet that go into internal network from the FW server itself. I allowed "FW (unprivport) -> PCAHostInternalIP (5632/5631)" only, after I change it to "PCAExternalIP (unprivport) -> PCAHostInternalIP (5632/5631)", everything is ok now!! Your help is much appreciated!
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