<185>Feb 27 03:01:36 WAFirewall CEF:0|Barracuda|WAF|1200|119|MALFORMED_VERSION|1|cat=WF dst=143.138.139.63 dpt=443 act=DENY msg=[PRI * HTTP/2.0] duser="-" src=99.206.212.123 spt=36598 requestMethod=PRI app=TLSv1.3 requestContext="-" start=Feb 27 2023 03:01:36  rt=1677488496203  request=/* requestClientApplication="Unknown" dvchost=WAFirewall externalId=186921b1e4b-4f997d8a cn2=36598 cn2Label=ProxyPort cs1=global cs1Label=RuleID cs2=NONE cs2Label=FollowUpAction cs3=GLOBAL cs3Label=RuleType cs4=Protocol Violations cs4Label=AttackGroup cs5=99.206.212.123 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:
senderhost: 10.0.0.250
serverport: 443
severitylabel: alert
tags: ['RuleID:global', 'barracuda_waf_MALFORMED_VERSION', 'RuleType:GLOBAL', 'barracuda_waf', 'rfc3164', 'SessionID:-', 'AttackGroup:Protocol Violations', 'FollowUpAction:NONE', 'MALFORMED_VERSION', 'cef', 'ProxyIP:167.94.145.58']
productids: [0]
sourceinfo: unknown
localstarttime: 1677488496203 
sensitivity: normal
localhostname: WAFirewall
priority: 185
facilitylabel: local7
messagetype: MALFORMED_VERSION
severitycode: 9
fqdn: /*
clientport: 36598
vendorcode: 119
action: block
facilitycode: 23
streamName: barracuda_waf
clientIP: 99.206.212.123
serverIP: 143.138.139.63
userName: -