Overview of services running on Port 255 TCP.
~15 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
http		4751	31.549
http	SonicWALL	2009	13.341
chat	AIM or ICQ server	1867	12.398
ssl	SSLv3	1000	6.641
no match	-/-	943	6.262
http	Apache	889	5.903
http	lighttpd	657	4.363
smtp		319	2.118
http	AIM	314	2.085
smtp	Postfix smtpd	290	1.926
http	Microsoft IIS httpd	201	1.335
http	thttpd	142	0.943
http	GoAhead-Webs httpd	125	0.83
http	Microsoft HTTPAPI httpd	99	0.657
ssh		92	0.611
ssh	OpenSSH	78	0.518
smtp	Exim smtpd	61	0.405
http-proxy	Squid http proxy	58	0.385
http	Apache Tomcat/Coyote JSP engine	56	0.372
telnet		55	0.365
http	Boa HTTPd	49	0.325
smtp	Microsoft ESMTP	47	0.312
http	Netwave IP camera http config	47	0.312
smtp	Microsoft Exchange smtpd	44	0.292
arcserve	ARCserve Discovery	37	0.246
vnc	VNC	35	0.232
smtp	Sendmail	34	0.226
http	Avtech AVN801 network camera	34	0.226
http	PDR-M800	26	0.173
ftp	Microsoft ftpd	24	0.159
mysql	MySQL	22	0.146
ftp		22	0.146
http	Hikvision-Webs	20	0.133
http	nginx	18	0.12
ftp	vsftpd	17	0.113
ftp	FileZilla ftpd	17	0.113
ssl	Microsoft IIS SSL	14	0.093
ftp	ProFTPD	13	0.086
http	uc-httpd	12	0.08
http	Mbedthis-Appweb	12	0.08
ftp	Pure-FTPd	11	0.073
http	GeoVision GeoHttpServer for webcams	10	0.066