Mac Address/Hostname nbsn udp.ort eq 67 or 68 IP ip.addr HTTP http.request HTTPS ssl.handshake.type == 1 Kerberos kerberos kerberos and ip.addr eq XXX.XXX.XXX.XXX windows account name kerberos.CNameString and !(kerberos.CNameString contains $) ->under cname or ip.addr eq 172.16.1.138 and kerberos.CNameString and !(kerberos.CNameString contains $) ->if result -> ip is a windows host Domain Controller Traffic udp.port eq 138 nbdgm.type == 17 TCP Syn tcp.flags eq 0x0002 Associated dns http.request or (tcp.flags eq 0x0002 and !(ip.dst eq 172.16.1.0/24)) or dns.qry.name