Overview of services running on Port 543 TCP.
~14 Thousand IP addresses observed from May to December 2012
To get raw lists of the data go to Download. For an explanation of what this data is and how it was obtained, see Paper.

Servicename	Product	Count	Percent
chat	AIM or ICQ server	2280	16.033
http		2015	14.169
ssl	SSLv3	1921	13.508
no match	-/-	1602	11.265
http	SonicWALL	752	5.288
klogin	HP-UX kerberized rlogin	677	4.761
imap	Courier Imapd	638	4.486
http	lighttpd	538	3.783
http	Apache	535	3.762
klogin	AIX kerberized rlogin	471	3.312
klogin	Kerberized rlogin	368	2.588
http	Router	271	1.906
ssh	OpenSSH	219	1.54
http	Microsoft IIS httpd	218	1.533
http	Microsoft HTTPAPI httpd	144	1.013
http	thttpd	120	0.844
http	GoAhead-Webs httpd	118	0.83
ssh		102	0.717
http	AIM	95	0.668
vnc	VNC	63	0.443
http	Boa HTTPd	57	0.401
telnet		56	0.394
login	Tru64 Unix logind	56	0.394
arcserve	ARCserve Discovery	55	0.387
ssl	TLS	51	0.359
http-proxy	Squid http proxy	49	0.345
http	Apache Tomcat/Coyote JSP engine	31	0.218
http	nginx	29	0.204
ftp		28	0.197
mysql	MySQL	23	0.162
ftp	Microsoft ftpd	22	0.155
ftp	vsftpd	21	0.148
smtp		19	0.134
login		19	0.134
http	Hikvision-Webs	18	0.127
ssl	Microsoft IIS SSL	17	0.12
smtp	Postfix smtpd	16	0.113
smtp	Exim smtpd	16	0.113
http	TP-LINK WA500G WAP http config	16	0.113
http	Avtech AVN801 network camera	16	0.113
ftp	Pure-FTPd	16	0.113
ftp	ProFTPD	15	0.105
ssh	Dropbear sshd	13	0.091
klogin	Solaris kerberized rlogin	13	0.091
ftp	FileZilla ftpd	13	0.091
smtp	Microsoft Exchange smtpd	12	0.084
ftp	Serv-U ftpd	12	0.084
domain	ISC BIND	12	0.084
directconnect	Direct Connect P2P	12	0.084
http	Netwave IP camera http config	11	0.077
vnc	RealVNC Enterprise	10	0.07