Greetings –

I have been trying to create a very basic filter that looks up a string in the incoming log. However, it would not match any filter and would go to the default filter. I have tried both match() and message(), neither worked for me. Please let me know if you think I am missing something.

Following are the chunks from the syslog-ng.conf

source s_net {

# All syslog traffic on port 514 - this is direct from network devices.

        udp(port (514));

        network(transport("tcp") max-connections(20000) log_iw_size(100000000) ); # tags("fortigate", "cisco", "default") );

};

filter f_discreg { message("default send string")  };

log { source(s_net); filter(f_dlptracker); destination(d_dlptracker); flags(final); };

Here is the log from the test I ran.

[2020-12-02T22:00:36+0000] Incoming log entry; source='s_net#0', line='default send string'

[2020-12-02T22:00:46+0000] Filter node evaluation result; filter_result='not-match', filter_type='OR'

[2020-12-02T22:00:46+0000] Filter rule evaluation result; filter_result='not-match', filter_rule='f_tanium'

[2020-12-02T22:00:46+0000] Filter rule evaluation begins; filter_rule='f_palo_alto'

[2020-12-02T22:00:46+0000] Filter node evaluation result; filter_result='not-match'

[2020-12-02T22:00:46+0000] Filter node evaluation result; filter_result='not-match'

[2020-12-02T22:00:46+0000] Filter node evaluation result; filter_result='not-match'

[2020-12-02T22:00:46+0000] Filter node evaluation result; filter_result='not-match', filter_type='OR'

[2020-12-02T22:00:46+0000] Filter node evaluation result; filter_result='not-match', filter_type='OR'

[2020-12-02T22:00:46+0000] Filter rule evaluation result; filter_result='not-match', filter_rule='f_palo_alto'

[2020-12-02T22:00:46+0000] Filter rule evaluation begins; filter_rule='f_dlptracker'

[2020-12-02T22:00:46+0000] Filter node evaluation result; filter_result='not-match'

[2020-12-02T22:00:46+0000] Filter rule evaluation result; filter_result='not-match', filter_rule='f_dlptracker'

[2020-12-02T22:00:46+0000] Outgoing message; destination='d_fallback#0', message='2020-12-02T22:00:46+00:00 172.17.236.3 default send string\x0a'

Regards,

Saqib M

Cybersecurity Co-op

Global Cybersecurity Technologies

Email: saqib.m@cummins.com

Cummins Inc.