Overview of services running on Port 8881 TCP.
~33 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						8565	25.48
irc	Dancer ircd					3978	11.834
http	SonicWALL				firewall	3693	10.986
chat	AIM or ICQ server					2074	6.17
no match						1564	4.653
http	Microsoft IIS httpd	6.0		Windows		821	2.442
http	AIM	1.0				720	2.142
http	lighttpd	1.4.19				530	1.577
ssl	TLS	1.0				484	1.44
http	lighttpd	1.4.29				447	1.33
http	Apache Tomcat/Coyote JSP engine	1.1				417	1.241
http	Microsoft IIS httpd					383	1.139
http	Microsoft IIS httpd	7.5		Windows		364	1.083
http	lighttpd	1.4.28				327	0.973
http	Apache					264	0.785
http	Ipswitch IMail Monitor web service	8.15		Windows		258	0.768
http	Allegro RomPager	4.07 UPnP/1.0	ZyXEL ZyWALL 2			253	0.753
http	Netwave webcam http config				webcam	235	0.699
ftp	ProFTPD	1.3.0		Unix		186	0.553
http	Netwave IP camera http config				webcam	165	0.491
http	Boa HTTPd	0.94.14rc21				157	0.467
http	udpxy multicast UDP-to-HTTP					143	0.425
http	lighttpd					135	0.402
http	IBM WebSphere Application Server	6.1				135	0.402
http	Microsoft IIS httpd	7.0		Windows		131	0.39
http	DrcomServer1.0					129	0.384
http	GoAhead-Webs httpd					122	0.363
http	sw-cp-server httpd		Parallels Plesk WebAdmin version psa-10.4.4-1013111102.18			121	0.36
http	OpenDNS Guide					121	0.36
http	Indy	9.00.10				117	0.348
http	mini_httpd	1.19 19dec2003				116	0.345
http	Hikvision-Webs					115	0.342
http	uTorrent utserver web interface			Linux		110	0.327
http	MikroTik router config httpd			RouterOS	router	101	0.3
http	GoAhead-Webs					98	0.292
ssh			protocol 1.5			93	0.277
http	thttpd	2.25b 29dec2003				81	0.241
http	Apache		SSL-only mode			81	0.241
ssh	MikroTik RouterOS sshd		protocol 2.0	Linux	router	78	0.232
http	Avtech AVN801 network camera	1.0	UPnP 1.0		webcam	77	0.229
http	sw-cp-server httpd		Parallels Plesk WebAdmin version psa-9.5.4-95110630.14			76	0.226
http	IBM WebSphere Application Server	7.0				76	0.226
http	NAI EPO Agent framework		Agent ListenServer 1.0	Windows		74	0.22
http	Apache	2.2.3	(CentOS)			64	0.19
ssh	OpenSSH	4.3	protocol 2.0			63	0.187
http	Boa HTTPd	0.94.13				59	0.176
http-proxy	Squid http proxy	2.6.STABLE16				57	0.17
http	Linux	2.x UPnP				56	0.167
telnet						54	0.161
http	PDR-M800	1.0				54	0.161
http	uc-httpd	1.0.0				53	0.158
http	Network Associates ePolicy Orchestrator					52	0.155
vnc	VNC		protocol 3.8			50	0.149
http	Rex media encoder http config	12.0.7601.17514		Windows		50	0.149
http	ADAM-6000	8.1.0019				50	0.149
http	uTorrent WebUI			Windows		47	0.14
http-proxy	Squid http proxy					46	0.137
http	webserver	1.0				45	0.134
http	GoAhead-Webs embedded httpd					45	0.134
http	Microsoft IIS httpd	5.0		Windows		41	0.122
http	Microsoft HTTPAPI httpd	2.0	SSDP/UPnP	Windows		41	0.122
http	Apache	2.2.16	(Debian)			41	0.122
ftp	Microsoft ftpd			Windows		41	0.122
http	BaseHTTPServer	0.3	Python SimpleXMLRPCServer; Python 2.5.4			40	0.119
http	Mbedthis-Appweb	2.0.4				37	0.11
http	Apache	2.2.14	(Ubuntu)			37	0.11
http	GeoVision GeoHttpServer for webcams				webcam	36	0.107
http	thttpd		Panasonic BB-HCM511 IP camera http config			35	0.104
http	Apache	2.2.9	(Win32) PHP/5.2.3			35	0.104
http	thttpd	2.25b-lxc 29dec2003				32	0.095
http	nginx	1.0.10				32	0.095
http	Jetty	6.1.25				32	0.095
http			General User			31	0.092
http-proxy	Squid http proxy	2.7.STABLE9				29	0.086
http	nginx					29	0.086
http	IBM WebSphere Application Server	6.0				29	0.086
http	Dungeon8					28	0.083
http	Cross Web Server					26	0.077
upnp	Portable SDK for UPnP devices	1.3.1	Linux 2.6.21; UPnP 1.0	Linux		25	0.074
http	WYM httpd	1.0	Grandtec wifi webcam http config		webcam	25	0.074
http	Draytek Vigor ADSL router webadmin				broadband router	25	0.074
http	Gadspot/Avtech AV787 webcam http config				webcam	24	0.071
http	Cisco IOS http config			IOS	switch	24	0.071
shoutcast-publishing	SHOUTcast publishing port					23	0.068
http	lighttpd	1.4.20				23	0.068
ssh	OpenSSH	5.1	protocol 2.0			21	0.062
ice	Internet Communications Engine					21	0.062
http	nginx	0.9.4				21	0.062
http	Microsoft IIS httpd	5.1		Windows		21	0.062
http	ESET NOD32 anti-virus update httpd			Windows		21	0.062
http	D-Link DIR-300 WAP http admin				WAP	21	0.062
http	Boa HTTPd	0.93.15				21	0.062
http	Apache	1.3.6				21	0.062
http	DVR Systems webcam http interface				webcam	20	0.059
ftp						20	0.059