<185>Dec 25 07:05:58 WAFirewall CEF:0|Barracuda|WAF|1210|119|MALFORMED_VERSION|1|cat=WF dst=215.93.254.40 dpt=443 act=DENY msg=[PRI * HTTP/2.0] duser="-" src=91.103.206.200 spt=36108 requestMethod=PRI app=TLSv1.3 requestContext="-" start=Dec 25 2023 07:05:58  rt=1703509558882  request=/* requestClientApplication="Unknown" dvchost=WAFirewall externalId=18ca1150662-ca2edcab cn2=36108 cn2Label=ProxyPort cs1=global cs1Label=RuleID cs2=NONE cs2Label=FollowUpAction cs3=GLOBAL cs3Label=RuleType cs4=Protocol Violations cs4Label=AttackGroup cs5=91.103.206.200 cs5Label=ProxyIP cs6="-" cs6Label=SessionID 

This is a syslog message from a product called Barracuda WAF by Barracuda. The following fields were extracted from the message:
action: block
clientport: 36108
facilitycode: 23
facilitylabel: local7
fqdn: /*
localhostname: WAFirewall
localstarttime: 1703509558882 
messagetype: MALFORMED_VERSION
priority: 185
senderhost: 10.0.0.250
sensitivity: normal
serverport: 443
severitycode: 9
severitylabel: alert
sourceinfo: unknown
tags: ['RuleID:global', 'barracuda_waf_MALFORMED_VERSION', 'RuleType:GLOBAL', 'barracuda_waf', 'rfc3164', 'cef', 'AttackGroup:Protocol Violations', 'FollowUpAction:NONE', 'MALFORMED_VERSION', 'SessionID:-', 'ProxyIP:162.142.125.217']
vendorcode: 119
streamName: barracuda_waf
clientIP: 91.103.206.200
serverIP: 215.93.254.40
userName: -