I'm having troubles getting a port forwarded in Ubuntu. I'm running VMWare
in my fw and the network interface of VMWare acts as local network (it's
NATted in VMWare). The problem is that The traffic gets forwarded to the
virtual machine, but when the vm replies, the traffic is not forwarded to
the net interface. So when I monitor the traffic of the local network
interface (vmnet6 in my case) I see the incoming packages coming from
internet and forwarded by the fw and I also see reply packages coming from
the VM. But if I monitor the net interface (eth0) I only see incoming
packages and no outgoing packages so those reply packages are not forwarded.
Otherwise the network in the vm works fine.

my shorewall settings:

interfaces:
net     eth0            detect
vmloc   vmnet6          detect

zones:
fw      firewall
net     ipv4
vmloc   ipv4

policy:
net             all             DROP                    info
fw              net             ACCEPT
vmloc           fw              ACCEPT
fw              vmloc           ACCEPT
vmloc           net             ACCEPT


rules:
DNAT:info net   vmloc:<VM ip>    tcp 80

Any suggestions?
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