Check the following ports are all opened?

What ports on the monitoring station and on the Gateway does ESRS use for applications?

• TCP port 80 (for HTTP, inbound/outbound)
• TCP port 443 (for HTTPS, inbound/outbound)
• TCP port 25 (for SMTP server, outbound)
• TCP port 6389 (for Unisphere Host Agent, outbound)
• TCP port 5414 (for EMCRemote Client, outbound)
• TCP port 9519 (for RemotelyAnywhere on CX4 systems running FLARE version 04.29 or later or on VNX systems, outbound)
• TCP port 6391, 6392, and 60020 (for Remote Diagnostic Agent, outbound)
• TCP port 22 (for CLI via SSH)
• TCP port 13456 (for KTCONS)
• TCP port 22 and 9519 (for RemoteKtrace)
• TCP port 80, 443, 2162, 2163, and 8000 (for USM, Unisphere, and NaviSecureCLI)

You need to configure DNS server on the VNX.