Add decoder for UFW logs #649
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Description
The UFW logs have the following format and there is no decoder that matches the logs:
For that reason, I have created the UFW decoder.
Tests
UFW tests
**Phase 1: Completed pre-decoding.
full event: 'Nov 18 13:39:49 UFW kernel: [10051.313745] [UFW BLOCK] IN=eth0 OUT= MAC=c2:56:27:73:33:cf:c4:f0:81:b0:93:24:08:00 SRC=205.205.205.205 DST=192.168.8.100 LEN=44 TOS=0x00 PREC=0x00 TTL=128 ID=43131 PROTO=UDP SPT=40952 DPT=23 LEN=194'
timestamp: 'Nov 18 13:39:49'
hostname: 'UFW'
program_name: 'kernel'
log: '[10051.313745] [UFW BLOCK] IN=eth0 OUT= MAC=c2:56:27:73:33:cf:c4:f0:81:b0:93:24:08:00 SRC=205.205.205.205 DST=192.168.8.100 LEN=44 TOS=0x00 PREC=0x00 TTL=128 ID=43131 PROTO=UDP SPT=40952 DPT=23 LEN=194'
**Phase 2: Completed decoding.
decoder: 'kernel'
action: 'BLOCK'
srcip: '205.205.205.205'
dstip: '192.168.8.100'
protocol: 'UDP'
srcport: '40952'
dstport: '23'
**Phase 3: Completed filtering (rules).
Rule id: '4100'
Level: '0'
Description: 'Firewall rules grouped.'
**Phase 1: Completed pre-decoding.
full event: 'Nov 18 13:39:49 UFW kernel: [10051.313745] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:17:08:ae:7a:40:08:00 SRC=205.205.205.205 DST=192.168.8.100 LEN=44 TOS=0x00 PREC=0x00 TTL=1 ID=4949 PROTO=2'
timestamp: 'Nov 18 13:39:49'
hostname: 'UFW'
program_name: 'kernel'
log: '[10051.313745] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:17:08:ae:7a:40:08:00 SRC=205.205.205.205 DST=192.168.8.100 LEN=44 TOS=0x00 PREC=0x00 TTL=1 ID=4949 PROTO=2'
**Phase 2: Completed decoding.
decoder: 'kernel'
action: 'BLOCK'
srcip: '205.205.205.205'
dstip: '192.168.8.100'
protocol: '2'
**Phase 3: Completed filtering (rules).
Rule id: '4100'
Level: '0'
Description: 'Firewall rules grouped.'
OpenWRT test
**Phase 1: Completed pre-decoding.
full event: 'Nov 18 13:39:49 OpenWRT kernel: [10051.313745] DROP(src wan)IN=eth0 OUT= MAC=c2:56:27:73:33:cf:c4:f0:81:b0:93:24:08:00 SRC=205.205.205.205 DST=192.168.8.100 LEN=44 TOS=0x00 PREC=0x00 TTL=31 ID=8549 PROTO=TCP SPT=40952 DPT=23 WINDOW=64144 RES=0x00 SYN URGP=0 MARK=0xff00'
timestamp: 'Nov 18 13:39:49'
hostname: 'OpenWRT'
program_name: 'kernel'
log: '[10051.313745] DROP(src wan)IN=eth0 OUT= MAC=c2:56:27:73:33:cf:c4:f0:81:b0:93:24:08:00 SRC=205.205.205.205 DST=192.168.8.100 LEN=44 TOS=0x00 PREC=0x00 TTL=31 ID=8549 PROTO=TCP SPT=40952 DPT=23 WINDOW=64144 RES=0x00 SYN URGP=0 MARK=0xff00'
**Phase 2: Completed decoding.
decoder: 'kernel'
action: 'DROP'
srcip: '205.205.205.205'
dstip: '192.168.8.100'
protocol: 'TCP'
srcport: '40952'
dstport: '23'
**Phase 3: Completed filtering (rules).
Rule id: '4101'
Level: '5'
Description: 'Firewall drop event.'
Runtests
runtests.py was run and no error found related to this PR.