Firepower syslog message

Anyconnect authentication syslog messages:

1. failure with invalid or non-exist username 
<164>%FTD-4-113005: AAA user authentication Rejected : reason = Unspecified : server = 192.168.2.100 : user = ***** : user IP = 203.0.113.138

2.failure with valid username 

<164>%FTD-4-722041: TunnelGroup <SSLVPN-AD> GroupPolicy <SSLVPN-GP> User <vpnuser1> IP <203.0.113.138> No IPv6 address available for SVC connection

3. Successful login
<164>%FTD-4-722051: Group <SSLVPN-GP> User <vpnuser1> IP <203.0.113.138> IPv4 Address <192.168.100.100> IPv6 address <::> assigned to session

Generate Email Alert for syslog

02-04-2022 13:38:47 Local4.Info 172.16.1.19 %FTD-6-113005: AAA user authentication Rejected : reason = AAA failure : server = 172.16.1.12 : user = ***** : user IP = 192.168.2.250

1. Specify a SMTP Server
    no way to configure SMTP login info in FMC, in the lab, use the SMTP service on Windows AD server, configured smart host points to home ISP SMTP server. 

2. Specify sender, recipient email address and syslog severity.
    

3. Create a custom Event List, specify Message ID

4. Configure Email as Destination

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Generate syslog for traffic

syslog generates from platform setting only has connection info, syslog from ACP  has rule info.

1. Use Syslog Alert as destination

1.1 Polices > Alerts, create a Syslog Alert

1.2 In ACP > Logging, tab, define the default syslog setting

1.3 In ACP rule logging setting, enable Syslog Server, default can be override. 

2. Syslog setting in platform setting

2.1 define syslog server

2.2 Specify platform setting syslog server for traffic logging.

Syslog for VPN

In Platform Setting, enable VPN logging to FMC

If choose Logging Level to "6-Informational ", deploy the policy will give you warning 

Suggest to set Logging Level to "4 - Warning"

Then we can change a syslog severity from default Informational to Warning if we need see a specific log message in FMC, when its default severity is Informational.

Syslog Settings > Enable Individual Syslog Messages, 

Here we can disable a Syslog ID or change a Syslog ID default Logging Level.