Details

A SYN-flood attack is a denial-of-service attack where the attacker sends a huge amount of please-start-a-connection packets and then nothing else. This causes the device being attacked to be overloaded with the open sessions and eventually crash.

A ping sweep (also known as an ICMP sweep) is a basic network scanning technique used to determine which of a range of IP addresses map to live hosts (computers).

Solution

If the firewall support SYN-flood or ping sweep protection then enable these features. If the firewall does not support these features, enable the security features on the router to protect the network from these attacks.

Supportive Information

The following resource is also helpful.

• https://iasecontent.disa.mil/stigs/zip/U_Network_Firewall_V8R25_STIG.zip

This security hardening control applies to the following category of controls within NIST 800-53: System and Communications Protection.This control applies to the following type of system Cisco.

References

• 800-53|SC-5.
• CAT|II
• Rule-ID|SV-3156r2_rule
• STIG-ID|NET0375
• Vuln-ID|V-3156

Source

• Tenable.com/audits