Syslog

The FortiAuthenticator can parse username and IP address information from a syslog feed from a third-party device, and inject this information into FSSO so it can be used in FortiGate identity based policies.

Syslog objects include sources and matching rules. Sources identify the entities sending the syslog messages, and matching rules extract the events from the syslog messages. Messages coming from non-configured sources will be dropped.

Injection of IPv6 addresses using Syslog-to-FSSO and API-to-FSSO is supported. IPv6 addresses are accepted by the backend parsing engine.

To configure syslog objects, go to Fortinet SSO > Methods > Syslog.

From the top, you can select from the following tabs:

• Syslog Sources

• Matching Rules

Syslog SSO must be enabled to configure syslog objects. Go to Fortinet SSO > Settings > Methods to enable Syslog SSO. See Methods.

The following options and information are available:

Create New	Create a new syslog source or matching rule.
Delete	Select to delete the selected object or objects.
Edit	Select to edit the selected object.
Reset column width	Select to reset the column widths to default.
Name	The name of the source.
IP Address	The IP address of the source.
Matching Rule	The matching rule for the source.
Syslog Matching Rule	The syslog matching rule.

Syslog sources

Each syslog source must be defined for the syslog daemon to accept traffic. Each source must also be configured with a matching rule (either pre-defined or custom built; see below), and syslog service must be enabled on the network interface(s) that will listen to remote syslog traffic.

To add a new syslog source:

1. Go to Fortinet SSO > Methods > Syslog and select Syslog Sources from the top.
2. Select Create New.

   The Create New Syslog Source window ones.

   

3. Enter the following information:

   Name	Enter a name for the source.
   IP address	Enter the IP address of the source.
   TLS encryption	Enable to specify if TLS encryption is required. Note: This option is only available when Allow TLS encryption in Syslog SSO is enabled in Fortinet SSO > Settings > Methods. See Methods.
   Matching rule	Select the requisite matching rule from the dropdown menu. A matching must already be created for the source.
   SSO user type	Select the SSO user type: External: Users are not defined on the FortiAuthenticator and user groups come from the source. Local users: Users are defined on the FortiAuthenticator as local users, and user groups are retrieved from the local groups. Any group from the syslog messages are ignored. Remote users: Users are defined on a remote LDAP server and user groups are retrieved from the LDAP server. Any group from the syslog messages are ignored.
   Strip off prefix or suffix from username if any	Enable to strip prefixes and suffixes from the SSO usernames.
   Use a different attribute when searching user in the remote LDAP server (other than the username attribute in the remote LDAP server config)	Enable and in Remote LDAP user attribute, enter a remote LDAP user attribute to use when searching a user in the remote LDAP server. Note: The option is only available when SSO user type is set to Remote users.
   Use prefix or suffix in username as domain (other than the remote LDAP server domain)	Enable to use prefix or suffix in username as the domain. Once enabled, in Default domain if not specified, enter a default domain. Note: The option is only available when SSO user type is set to Remote users.

4. Select Save to add the source.

Matching rules

A matching rule is a query, or policy, that is applied to a syslog message in order to determine required information, such as the username and IP address. Rules are required for every syslog source.

Predefined rules are available for FortiNAC appliances, and Aruba and Cisco wireless controllers (see Predefined rules). For other systems, custom policies can be created to parse message files in various formats.

Predefined rules

Predefined matching rules are included for FortiNAC appliances, and Aruba and Cisco ACS or ISE wireless controllers.

Each field containing a variable (e.g. Client IPv4 and Client IPv6 fields) needs one or more characters after the {{:variable}} to let FortiAuthenticator know where to stop the parsing. Any combination of characters will work. The examples below use ",".

FortiNAC

Trigger		FSSO
Auth Type Indicators		Logon:login Logoff:logout
Username field		username={{:username}},
Client IPv4 field		IP={{:client_ip}},
Client IPv6 field		e.g. Framed-IPv6-Address={{:client_ipv6}},
Group field		tags="{{:group}}"
	Group list separator	SSO syslog feed can parse multiple groups if the names are separated by a plus (+) symbol or a comma (,).

Aruba

Trigger		None; any logs are accepted.
Auth Type Indicators		Logon:User Authentication Successful (exact match required; no delimiter or value)
Username field		username={{:username}},
Client IPv4 field		IP={{:client_ip}},
Client IPv6 field		e.g. Framed-IPv6-Address={{:client_ipv6}},
Group field		AAA profile={{:group}}
	Group list separator	SSO syslog feed can parse multiple groups if the names are separated by a plus (+) symbol or a comma (,).

Cisco

Trigger		NOTICE Radius-Accounting
Auth Type Indicators		Logon:Acct-Status-Type=Start Update:Acct-Status-Type=Interim Logoff:Acct-Status-Type=Stop
Username field		User-Name={{:username}},
Client IPv4 field		Framed-IP-Address={{:client_ip}},
Client IPv6 field		e.g. Framed-IPv6-Address={{:client_ipv6}},
Group field		e.g. profile={{:group}}
	Group list separator	SSO syslog feed can parse multiple groups if the names are separated by a plus (+) symbol or a comma (,).

To create a new matching rule:

1. Go to Fortinet SSO > Methods > Syslog and select Matching Rules from the top.
2. Select Create New.

   The Create New Syslog Matching Rule page opens.

3. Enter the following information:

   Name		Enter a name for the source.
   Description		Optionally enter a description of the rule.
   Mode		Select from the following two options: Key-value pairs: parses syslog messages with key/value pairs. List of values: parses syslog messages with a list of values.
   Fields to Extract		Configure the fields to extract from the message.
   	Field separator	The field separator (default = ,). Note: The option is only available when the Mode is List of values.
   	Trigger	Optionally, enter a string that must be present in all syslog messages. This will act as a pre-filter (default = NOTICE Radius-Accounting). Note: The option is only available when the Mode is Key-value pairs.
   	Field position	Enter the position of the trigger field (default = 4). Note: The option is only available when the Mode is List of values.
   	Field value	Enter the value for the trigger field, e.g., USERID. Note: The option is only available when the Mode is List of values.
   	Auth Type Indicators	Enter strings to differentiate between the types of user activities: Logon (default = Acct-Status-Type=Start), Update (default = Acct-Status-Type=Interim) (optional), and Logoff (default = Acct-Status-Type=Stop) (optional). Note: The option is only available when the Mode is Key-value pairs.
   	Logon field position	Enter the Logon field position (default = 5). Note: The option is only available when the Mode is List of values.
   	Logon field value	Enter the Logon field value, e.g., login. Note: The option is only available when the Mode is List of values.
   	Update field position	Enter the Update field position (default = 0). Note: The option is only available when the Mode is List of values.
   	Update field value	Enter the Update field value. Note: The option is only available when the Mode is List of values.
   	Logoff field position	Enter the Logoff field position (default = 0). Note: The option is only available when the Mode is List of values.
   	Logoff field value	Enter the Logoff field value. Note: The option is only available when the Mode is List of values.
   	Username field	Define the semantics of the username field. For example: User-Name={{:username}}, where {{:username}} indicates where the username is extracted from. Note: The option is only available when the Mode is Key-value pairs.
   	Username field position	Enter the username field position (default = 10). Note: The option is only available when the Mode is List of values.
   	Client IPv4 field	Define the semantics of the client IPv4 address (default = Framed-IP-Address={{:client_ip}},). Note: The option is only available when the Mode is Key-value pairs.
   	Client IPv4 field position	Enter the client IPv4 field position (default = 9). Note: The option is only available when the Mode is List of values.
   	Client IPv6 field	Define the semantics of the client IPv6 address (default = Framed-IPv6-Address={{:client_ipv6}},). Note: The option is only available when the Mode is Key-value pairs.
   	Client IPv6 field position	Enter the client IPv6 field position (default = 0). Note: The option is only available when the Mode is List of values.
   	Group field	Optionally, define the semantics of the group. The group may not always be included in the syslog message, and may need to be retrieved from a remote LDAP server, e.g., profile = {{:group}}. Note: The option is only available when the Mode is Key-value pairs.
   	Group field position	Enter the group field position (default = 0). Note: The option is only available when the Mode is List of values.
   	Group list separator	Specify the separator (default = ,).
   Test Rule		Paste a sample log message into the text box, then select Test to test that the desired fields are correctly extracted.

4. Select Save to add the new matching rule.