Overview of services running on Port 3351 TCP.
~27 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	Version	Count	Percent
psql-btrieve	Pervasive.SQL Server - Btrieve Engine		15405	55.292
irc	Dancer ircd		4094	14.694
chat	AIM or ICQ server		2373	8.517
no match	-/-	-/-	2266	8.133
http			459	1.647
http	lighttpd	1.4.19	424	1.522
mysql	MySQL		273	0.98
eggdrop	Eggdrop irc bot console	1.6.18	222	0.797
http	Microsoft IIS httpd		195	0.7
http	WangWnagSimpleServer	1.0	170	0.61
http	GoAhead-Webs httpd		154	0.553
http	Microsoft HTTPAPI httpd	2.0	129	0.463
mysql	MySQL	5.1.48-community	121	0.434
http	thttpd	2.24	113	0.406
mysql	MySQL	5.1.51-community	102	0.366
ssh			95	0.341
vnc	VNC		77	0.276
telnet			56	0.201
http	Boa HTTPd	0.94.14rc21	48	0.172
arcserve	ARCserve Discovery		48	0.172
http	thttpd	2.25b	36	0.129
ftp	Microsoft ftpd		32	0.115
http	Hikvision-Webs		30	0.108
nntp	INN nntpd		28	0.1
http-proxy	Squid http proxy	2.7.STABLE9	27	0.097
http	Apache	2.2.3	21	0.075
http-proxy	Squid http proxy	2.6.STABLE12	19	0.068
vnc	RealVNC Enterprise		18	0.065
ssh	OpenSSH	4.3	18	0.065
ftp			18	0.065
ssl	TLS	1.0	15	0.054