This section provides information about troubleshooting firewall issues. What to read next Monitor and Troubleshoot Firewall on NSX ManagerThere are several steps to take when troubleshooting firewall. Troubleshooting Distributed Firewall on ESX HostsOn ESX hosts, follow these steps to troubleshoot the NSX distributed firewall (DFW) data path issues. See the NSX Command-Line Interface Reference for more firewall troubleshooting commands. Troubleshooting Gateway FirewallUse the user interface and API to troubleshoot gateway firewall. Outbound SMTP Emails Time OutEmail traffic with larger attachment size fails. Traffic is not Redirected During Edge FailoverExisting traffic flow will not be redirected during failover if gateway firewall rules are not configured correctly. Check Rule Realization StatusDFW rules can be created, updated, and deleted using both the UI and API. Distributed Firewall Packet LogsIf logging is enabled for firewall rules, you can look at the firewall packet logs to troubleshoot issues. Parent topic: Security
