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	Version	Info	OS	Devicetype	Count	Percent
http						4739	31.47
http	SonicWALL				firewall	2009	13.341
chat	AIM or ICQ server					1867	12.398
ssl	SSLv3					1000	6.641
no match						943	6.262
http	Apache	2.2.8	PHP/5.2.4-2ubuntu5.19 with Suhosin-Patch			616	4.091
http	lighttpd	1.4.19				384	2.55
smtp						319	2.118
http	AIM	1.0				314	2.085
smtp	Postfix smtpd					259	1.72
http	lighttpd	1.4.29				255	1.693
http	GoAhead-Webs httpd					125	0.83
http	Microsoft IIS httpd					122	0.81
http	Microsoft HTTPAPI httpd	2.0	SSDP/UPnP	Windows		99	0.657
ssh			protocol 1.5			90	0.598
http	thttpd	2.24				72	0.478
http	Apache	2.2.8	(Ubuntu) PHP/5.2.4-2ubuntu5.19 with Suhosin-Patch			69	0.458
http	Microsoft IIS httpd	6.0		Windows		61	0.405
http	Apache Tomcat/Coyote JSP engine	1.1				55	0.365
telnet						54	0.359
http	Netwave IP camera http config				webcam	47	0.312
smtp	Microsoft Exchange smtpd			Windows		41	0.272
smtp	Exim smtpd					39	0.259
arcserve	ARCserve Discovery					37	0.246
http	Avtech AVN801 network camera	1.0	UPnP 1.0		webcam	34	0.226
smtp	Microsoft ESMTP	6.0.3790.4675		Windows		31	0.206
smtp	Postfix smtpd		Virtual Hosting Control System 2.3.9-11 Spartacus			29	0.193
http-proxy	Squid http proxy	2.6.STABLE12				27	0.179
http	PDR-M800	1.0				26	0.173
http	Boa HTTPd	0.94.14rc21				26	0.173
smtp	Sendmail		Not accepting mail			25	0.166
http	Apache					25	0.166
vnc	VNC		protocol 3.8			24	0.159
ftp	Microsoft ftpd			Windows		23	0.153
http	thttpd	2.25b				22	0.146
ftp						22	0.146
http-proxy	Squid http proxy	2.7.STABLE9				21	0.139
http	Hikvision-Webs					20	0.133