I was running both Tumbleweed and HIPS 7.0 at my last job. I added Tumbleweed as a Trusted Application and never had a problem with it.
If firewall is blocking you make sure you add the rule for the application to allow the exception
basically you should check the firewall log and see whats blocked since you already identified that go to the policy that governs that server for HIPS firewall
fierwall rules edit it and add that rules enable it and add the port for localservice and remote service if any u can also add the link the application or you can leave it any save the policy enfore it from your server by opening the McAfee icon and click and send props from the status m onitor
it will be also good if you post your firewall log