Since you mention VMnet1 and VMnet8 I guess you are using either Vmware Workstion, Player or Server ...
Simply set the internal Firewall IP as the default gateway in the other guest OS instead of the VMnet1 IP (should be 192.168.181.2).
Edited to add:
And make sure to have firewall rules in place that actually allow the traffic.
Yes, I am using VMWare Workstation. I gave the internal IP of the firewall as the gateway on the Guest OS. But it did not work. I have an ACL to allow internet traffic from any source... I am able ping the internal IP of the firewall from the Guest OS.... But nothing further....
Is DNS working on the client and the firewall?
Does a "showaudit -H IPOFYOUR_CLIENTVM" show any audit?
I figured out the issue... Thanks for all valid comments....
What was your issue? If it was confusion with documentation or the Firewall product itself we would love to hear about it as we always look to make things easier.