SmartSniff - SmartSniff is a packet sniffer that capture TCP/IP packets and display them as sequence of conversations between clients and servers.
Cisco DNA Center - Find and resolve network issues with Cisco DNA Center. Provides software-based network automation and assurance. Control and manage intent-based networks.
tcpdump - tcpdump is a common packet analyzer that runs under the command line.
F5 Advanced Firewall Manager - Stop even the most massive and complex DDoS attacks with BIG-IP Advanced Firewall Manager: advanced data center protection against layer 3–4 threats.
Packet Sender - Packet Sender can send and receive UDP, TCP, and SSL on the ports of your choosing.
Palo Alto Networks Panorama - Greater visibility, tighter control, less effort. Panorama™ network security management simplifies management tasks while delivering comprehensive controls and deep visibility into network-wide traffic and security threats.