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Sample Cisco FWSM Field Extraction Rule

There are multiple rules to cover Cisco FWSM logs since these logs have multiple formats and multiple functions.

The first rule is generic and matches all messages:

Cisco FWSM

Rule Name: Cisco FWSM 

Log Type: cisco fwsm

Sample Log:

Scope:

sourceCategory=networking/cisco/fwsm

Extraction Rule:

parse "FWSM-*-*:" as log_level,msg_code | parse regex " (?<host>.+)-(?:FWSM|fwsm)" | if(log_level=0,"emergency",if(log_level=1,"alert",if(log_level=2,"critical",if(log_level=3,"error",if(log_level=4,"warning",if(log_level=5,"notification",if(log_level=6,"informational",if(log_level=7,"debug","Other")))))))) as log_level_desc

Cisco FWSM AcceptFWSM Accept

Rule Name: Cisco FWSM AcceptFWSM Accept

Log Type: cisco fwsm

Sample Log:

2014-10-14T13:38:09.185081-04:00 DEVICE-NAME %FWSM-6-302013: Built outbound TCP connection 146219215463786753 for Inside-FW:129.228.122.212/54734 (217.147.244.169/6226) to Outside:178.255.155.18/443 (178.255.155.18/443)

Scope:

_sourceCategory=networking/cisco/fwsm Built AND (outbound OR inbound)

Extraction Rule:

parse "Teardown * connection" as protocol nodrop | parse regex "for\s(?<src_dom>\S+):(?<src_ip>\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/(?<src_port>\d+)\s" nodrop | parse regex "to\s(?<dest_dom>\S+):(?<dest_ip>\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/(?<dest_port>\d+)\s" nodrop | "firewall-teardown" as eventtype | "cisco-firewall" as event
``` 

## Cisco FWSM TeardownFWSM Teardown

**Rule Name:** Cisco FWSM TeardownFWSM Teardown

**Log Type:** cisco fwsm

**Sample Log:**

2014-10-14T13:42:10.544871-04:00 DEVICE-NAME %FWSM-6-302014: Teardown TCP connection 146520541779339583 for Inside-FW:129.228.122.212/60371 to Outside:176.223.220.230/443 duration 0:00:00 bytes 580 TCP FINs


**Scope:**

```sql
_sourceCategory=networking/cisco/asa Teardown !local-host !dynamic !ICMP

Extraction Rule:

parse "Teardown * connection" as protocol nodrop | parse regex "for\s(?<src_dom>\S+):(?<src_ip>\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/(?<src_port>\d+)\s" nodrop | parse regex "to\s(?<dest_dom>\S+):(?<dest_ip>\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/(?<dest_port>\d+)\s" nodrop | "firewall-teardown" as eventtype | "cisco-firewall" as event

Cisco FWSM Deny

Rule Name: Cisco FWSM Deny src dstFWSM Deny src dst

Log Type: cisco fwsm

Sample Log:

2014-10-14T13:42:10.544871-04:00 DEVICE-NAME %FWSM-6-302014: Teardown TCP connection 146520541779339583 for Inside-FW:129.228.122.212/60371 to Outside:176.223.220.230/443 duration 0:00:00 bytes 580 TCP FINs

Scope:

_sourceCategory=networking/cisco/fwsm deny src dst !"Deny inbound" !"Deny protocol" !"Deny IP"

Extraction Rule:

parse "Deny * " as protocol nodrop | parse regex "src\s(?<src_dom>\S+):(?<src_ip>\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})" nodrop | parse regex "/(?<src_port>\d+)\s" nodrop | parse regex "dst\s(?<dest_dom>\S+):(?<dest_ip>\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})" nodrop | parse regex "/(?<dest_port>\d+)\s" nodrop | "firewall-deny" as eventtype | "cisco-firewall" as event

Cisco FWSM Deny from toFWSM

Rule Name: Cisco FWSM Deny from toFWSM Deny from to

Log Type: cisco fwsm

Sample Log:

2014-10-14T13:55:23.469095-04:00 DEVICE-NAME %FWSM-6-106015: Deny TCP (no connection) from 190.93.246.9/80 to 217.147.244.123/45050 flags SYN ACK on interface Outside

Scope:

_sourceCategory=networking/cisco/fwsm deny from to !"Deny inbound" !"Deny protocol" !"Deny IP"

Extraction Rule:

parse "Deny * " as protocol nodrop | parse regex "from\s(?<src_ip>\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/(?<src_port>\d+)\s" nodrop | parse regex "to\s(?<dest_ip>\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/(?<dest_port>\d+)\s" nodrop | "firewall-deny" as eventtype | "cisco-firewall" as event

Cisco FWSM Deny in outFWSM Deny in out

Rule Name: Cisco FWSM Deny in outFWSM Deny in out

Log Type: cisco fwsm

Sample Log:

2014-10-14T13:52:28.454444-04:00 DEVICE-NAME %FWSM-3-106011: Deny inbound (No xlate) icmp src Outside:190.93.244.9 dst Outside:217.147.245.50 (type 0, code 0)

Scope:

_sourceCategory=networking/cisco/fwsm src dst ("Deny inbound" OR "Deny protocol")

Extraction Rule:

parse "Deny protocol * " as protocol nodrop | parse ") * " as protocol nodrop | parse regex "%[A-Z]{4}-(?<severity>\d)-(?<msg_code>\d{6}):\s" nodrop | parse regex "src\s(?<src_dom>\S+):(?<src_ip>\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})" nodrop | parse regex "/(?<src_port>\d+)\s" nodrop | parse regex "dst\s(?<dest_dom>\S+):(?<dest_ip>\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})" nodrop | parse regex "/(?<dest_port>\d+)\s" nodrop | "firewall-deny" as eventtype | "cisco-firewall" as event
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