IPS sensor attributes, IPS sensor filters | Fortinet instruction


IPS sensors	Configuring IPS sensors

To view an IPS sensor, go to Intrusion Protection > IPS Sensor and select the Edit icon of any IPS sensor. The Edit IPS Sensor window is divided into three parts: the sensor attributes, the filters, and the overrides.

Figure 9: Edit IPS sensor

IPS sensor attributes:

Name	The name of the IPS sensor. You can change it at any time.
Comments	An optional comment describing the IPS sensor. You can change it at
	any time.
OK	Select to save changes to Name or Comments.
IPS sensor filters:
Add Filter	Add a new filter to the end of the filter list. For more information, see
	“Configuring filters” on page 42.
#	Current position of each filter in the list.
Name	The name of the filter.
Signature	Signature attributes specify the type of network traffic the signature
attributes	applies to.
	Severity	The severity of the included signatures.
	Target	The type of system targeted by the attack. The targets
		are client and server.
	Protocol	The protocols to which the signatures apply. Examples
		include HTTP, POP3, H323, and DNS.
	OS	The operating systems to which the signatures apply.
	Application The applications to which the signatures apply.
Enable	The status of the signatures included in the filter. The signatures can be
	set to enabled, disabled, or default. The default setting uses the default
	status of each individual signature as displayed in the signature list.
Logging	The logging status of the signatures included in the filter. Logging can
	be set to enabled, disabled, or default. The default setting uses the
	default status of each individual signature as displayed in the signature
	list.
Action	The action of the signatures included in the filter. The action can be set
	to pass all, block all, reset all, or default. The default setting uses the
	action of each individual signature as displayed in the signature list.
Count	The number of signatures included in the filter. Overrides are not
	included in this total.
Delete icon	Delete the filter.
Edit icon	Edit the filter.
Insert icon	Create a new filter and insert it above the current filter.

FortiGate IPS User Guide Version 3.0 MR7
01-30007-0080-20080916	41

Image 41

Fortinet manual IPS sensor attributes, IPS sensor filters

Contents

E R G U I D E Trademarks Contents IPS sensors Protocol decodersDoS sensors SYN flood attacks FortiGate IPS Introduction Fortinet documentation About this documentDocument conventions Typographic conventions FortiGate Pptp VPN User Guide Comments on Fortinet technical documentation Customer service and technical supportFortinet Knowledge Center This section contains the following topics IPS overview and general configurationIPS settings and controls Default signature and anomaly settings When to use IPSDefault fail open setting Config ips global Set fail-open enable disable end Configuring logging and alert email Setting the buffer sizeMonitoring the network and dealing with attacks Controlling sessions Attack log messages Signature FortiGuard Center Anomaly Creating a protection profile that uses IPS sensors Using IPS sensors in a protection profileAdding protection profiles to firewall policies Select Create New Adding protection profiles to user groups Using IPS sensors in a protection profile Viewing the predefined signature list Predefined signaturesIPS predefined signatures Enable SettingsColumn Clear All Filters Create a sensor and add IPS filters to it Viewing the predefined signature list Viewing the custom signature list Custom signaturesIPS custom signatures Adding custom signatures using the web-based manager Custom signature configurationAdding custom signatures using the CLI Command syntax pattern Shows the valid characters for custom signature fields Creating custom signaturesCustom signature fields Attackid Custom signature syntaxName BufferOverflow Srcport Content keywords Keyword and value Description Deprecated, see pattern and context keywords Context uri Pattern GETPattern yahoo.com Context host Regex/mdelim PcreRegexdelimismxAEGRU Uri !uristr IP header keywords Keyword and Value Description Protocol tcp TCP header keywords Keyword and Value Description Tcpflags S,12 Tcpflags AP Other keywords Keyword and Value Description UDP header keywords Keyword and Value DescriptionIcmp keywords Keyword and Value Usage Sbid --name Block.example.com Example 1 signature to block access to example.comExample custom signatures Sbid --name Block.example.com Sbid --name Block.SMTP.VRFY.CMD --pattern vrfy Example 2 signature to block the Smtp ‘vrfy’ commandSbid --name Block.SMTP.VRFY.CMD Creating custom signatures Upgrading the IPS protocol decoder list Protocol decodersProtocol decoders Protocol decoder list Protocols Protocol decoder names Port Viewing the protocol decoder list Alldefaultpass AlldefaultIPS sensors Viewing the IPS sensor list Adding an IPS sensor Configuring IPS sensorsProtectclient Protectemailserver IPS sensor filters IPS sensor attributes Reset Configuring filtersIPS sensor overrides Delete and Edit Delete or edit the filter Icons Application Configuring pre-defined and custom overrides Source Exempt IP DoS sensors Viewing the DoS sensor list Configuring DoS sensorsSequence in which the sensors examine network traffic Appears, and select OK DoS sensor attributes Anomaly configurationName Enter or change the DoS sensor name Comments Will appear in the DoS sensor list Understanding the anomalies Udpflood Anomaly Description TcpdstsessionUdpscan Udpsrcsession Understanding the anomalies How SYN floods work What is a SYN flood attack?SYN flood attacks What is SYN proxy? What is SYN threshold?FortiGate IPS Response to SYN flood attacks How IPS works to prevent SYN floods IPS operation before synflood threshold is reached Configure the options for tcpsynflood Select OK Configuring SYN flood protectionSuggested settings for different network conditions Icmp sweep attacks What is an Icmp sweep?How Icmp sweep attacks work FortiGate IPS response to Icmp sweep attacks Predefined Icmp signatures Icmp sweep anomalies Configuring Icmp sweep protection FortiGate Version 3.0 MR7 IPS User Guide Index Technical support