<185>Sep 18 07:37:43 WAFirewall CEF:0|Barracuda|WAF|1210|342|GEO_IP_BLOCK|1|cat=WF dst=77.85.198.222 dpt=443 act=DENY msg=[GeoIP Policy Match] duser="-" src=252.227.151.229 spt=51274 requestMethod=GET app=TLSv1.3 requestContext="-" start=Sep 18 2023 07:37:43  rt=1695040663059  request=/robots.txt requestClientApplication="Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)" dvchost=WAFirewall externalId=18aa84bede2-9cc61c3c cn2=51274 cn2Label=ProxyPort cs1=global cs1Label=RuleID cs2=NONE cs2Label=FollowUpAction cs3=GLOBAL cs3Label=RuleType cs4=Forceful Browsing cs4Label=AttackGroup cs5=252.227.151.229 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: 51274
facilitycode: 23
facilitylabel: local7
fqdn: /robots.txt
localhostname: WAFirewall
localstarttime: 1695040663059 
messagetype: GEO_IP_BLOCK
priority: 185
senderhost: 10.0.0.250
sensitivity: normal
serverport: 443
severitycode: 9
severitylabel: alert
sourceinfo: unknown
tags: ['RuleID:global', 'barracuda_waf_GEO_IP_BLOCK', 'AttackGroup:Forceful Browsing', 'ProxyIP:213.180.203.151', 'RuleType:GLOBAL', 'barracuda_waf', 'rfc3164', 'GEO_IP_BLOCK', 'cef', 'SessionID:-', 'FollowUpAction:NONE']
vendorcode: 342
streamName: barracuda_waf
clientIP: 252.227.151.229
serverIP: 77.85.198.222
userName: -