HP ProCurve 7102dl Reference Manual page 408

SROS Command Line Interface Reference Guide
ip firewall check winnuke
Use the ip firewall check winnuke command to enable the SROS stateful inspection firewall to discard all
Out of Band (OOB) data (to protect against WinNuke attacks). Use the no form of this command to disable
this feature.
Note
The SROS security features must be enabled (using the ip firewall command) for the
stateful inspection firewall to be activated.
Syntax Description
No subcommands.
Default Values
All SROS security features are disabled by default until the ip firewall command is issued at the Global
Configuration prompt. Issuing the ip firewall command enables the WinNuke check.
Functional Notes
WinNuke attack is a well-known denial of service attack on hosts running Microsoft Windows
systems. An intruder sends Out of Band (OOB) data over an established connection to a Windows user.
Windows cannot properly handle the OOB data and the host reacts unpredictably. Normal shut-down of the
hosts will generally return all functionality. Using the ip firewall check winnuke command configures the
SROS stateful inspection firewall to filter all OOB data to prevent network problems.
Usage Examples
The following example enables the firewall to filter all OOB data:
ProCurve(config)#ip firewall check winnuke
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Global Configuration Mode Command Set
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