DFW rules are not matched as expected when nested Groups are used

Products

• VMware vDefend Firewall

Issue/Introduction

• NSX 3.2.x or 4.x
• DFW rules use Groups which have another Group as a member (nested Group membership) or the Group itself is a member of another Group
• The DFW rule is not matched as expected

Environment

VMware NSX-T Data Center
VMware NSX

Cause

Due to a race condition in the Controller, the Group IP membership realized at the ESX dataplane is incomplete on some hosts. This results in traffic not matching the corresponding DFW rules as expected.

Resolution

This issue is resolved in VMware NSX 3.2.3.1
This issue is resolved in VMware NSX 3.2.4
This issue is resolved in VMware NSX 4.1.1
This issue is resolved in VMware NSX 4.2.0

Workaround:
There are two possible workaround options:

Option 1
To resolve the issue restart the affected NSX Controller service, note the issue may reoccur at a later time.

1. On the ESXi host experiencing the problem, identify the Controller it connects to.
   
   
   1. From root shell run the command
   nsxcli -c get controller 
   
   For example
   > nsxcli -c get controllers 
    Controller IP    Port     SSL         Status       Is Physical Master   Session State  Controller FQDN 
     X.X.X.X    1235   enabled     connected             true               up               NA
     Y.Y.Y.Y    1235   enabled      not used            false              null              NA       
     Z.Z.Z.Z    1235   enabled      not used            false              null              NA
   
   
   
2. ssh to the Controller identified in step 1 as admin and restart the controller service using the cli command
   
    > restart service controller
   
   
3. Run get cluster status and confirm CONTROLLER is reported as STABLE with all 3 nodes UP

Option 2
To prevent the issue from reoccurring, if possible re-configure DFW rules not to use nested Groups.
After the configuration change, restart the Controller service on all 3 Managers as admin user

     > restart service controller

If removing nested configuration is not possible, please open a Support Request with VMware to discuss other options.