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	Count	Percent
http			8670	25.792
irc	Dancer ircd		3978	11.834
http	SonicWALL		3693	10.986
chat	AIM or ICQ server		2074	6.17
no match	-/-	-/-	1564	4.653
http	Microsoft IIS httpd	6.0	821	2.442
http	AIM	1.0	720	2.142
http	lighttpd	1.4.19	531	1.58
ssl	TLS	1.0	484	1.44
http	lighttpd	1.4.29	447	1.33
http	Apache Tomcat/Coyote JSP engine	1.1	434	1.291
http	Microsoft IIS httpd		390	1.16
http	Microsoft IIS httpd	7.5	364	1.083
http	Apache		347	1.032
http	lighttpd	1.4.28	327	0.973
http	Ipswitch IMail Monitor web service	8.15	258	0.768
http	Allegro RomPager	4.07 UPnP/1.0	253	0.753
http	Netwave webcam http config		235	0.699
http	sw-cp-server httpd		233	0.693
ftp	ProFTPD	1.3.0	186	0.553
http	Netwave IP camera http config		165	0.491
http	Boa HTTPd	0.94.14rc21	157	0.467
http	udpxy multicast UDP-to-HTTP		143	0.425
http	GoAhead-Webs httpd		138	0.411
http	lighttpd		135	0.402
http	IBM WebSphere Application Server	6.1	135	0.402
http	Microsoft IIS httpd	7.0	131	0.39
http	DrcomServer1.0		129	0.384
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		110	0.327
http	Apache	2.2.22	108	0.321
http	Apache	2.2.3	104	0.309
http	Apache	2.2.14	102	0.303
http	MikroTik router config httpd		101	0.3
http	GoAhead-Webs		98	0.292
ssh			95	0.283
http	thttpd	2.25b 29dec2003	81	0.241
ssh	MikroTik RouterOS sshd		78	0.232
http	Avtech AVN801 network camera	1.0	77	0.229
http	IBM WebSphere Application Server	7.0	76	0.226
http	NAI EPO Agent framework		74	0.22
http	Apache	2.2.9	72	0.214
http	Apache	2.2.16	72	0.214
vnc	VNC		69	0.205
http	Network Associates ePolicy Orchestrator		69	0.205
ssh	OpenSSH	4.3	63	0.187
http	Boa HTTPd	0.94.13	59	0.176
http	thttpd		57	0.17
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	Rex media encoder http config	12.0.7601.17514	50	0.149
http	ADAM-6000	8.1.0019	50	0.149
http	webserver	1.0	48	0.143
http	uTorrent WebUI		47	0.14
http	BaseHTTPServer	0.3	47	0.14
http-proxy	Squid http proxy		46	0.137
http	GoAhead-Webs embedded httpd		45	0.134
http	Apache	2.2.15	45	0.134
http	Microsoft IIS httpd	5.0	41	0.122
http	Microsoft HTTPAPI httpd	2.0	41	0.122
ftp	Microsoft ftpd		41	0.122
http	Apache	2.2.17	40	0.119
http	WYM httpd	1.0	39	0.116
http	Mbedthis-Appweb	2.0.4	37	0.11
http	GeoVision GeoHttpServer for webcams		36	0.107
http	nginx	1.0.10	33	0.098
http	thttpd	2.25b-lxc 29dec2003	32	0.095
http	Jetty	6.1.25	32	0.095
http	Cisco IOS http config		32	0.095
http	Apache	2.2.8	30	0.089
http	Apache	1.3.28	30	0.089
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	Apache	1.3.6	29	0.086
http	Apache	1.3.42	29	0.086
http	Dungeon8		28	0.083
http	Router		27	0.08
http	Cross Web Server		26	0.077
upnp	Portable SDK for UPnP devices	1.3.1	25	0.074
http	Draytek Vigor ADSL router webadmin		25	0.074
http	Gadspot/Avtech AV787 webcam http config		24	0.071
shoutcast-publishing	SHOUTcast publishing port		23	0.068
http	lighttpd	1.4.20	23	0.068
http	Apache	2.0.61	23	0.068
http	HTTPD 1.0		22	0.065
ssh	OpenSSH	5.1	21	0.062
ice	Internet Communications Engine		21	0.062
http	nginx	0.9.4	21	0.062
http	Microsoft IIS httpd	5.1	21	0.062
http	ESET NOD32 anti-virus update httpd		21	0.062
http	D-Link DIR-300 WAP http admin		21	0.062
http	Boa HTTPd	0.93.15	21	0.062
http	DVR Systems webcam http interface		20	0.059
ftp			20	0.059
http	TwistedWeb httpd	8.2.0	19	0.057
http	nginx	1.0.5	19	0.057
http	Apache	2.0.43	19	0.057
ssh	OpenSSH	5.3	18	0.054
http-proxy	MikroTik http proxy		18	0.054
http	lighttpd	1.4.26	18	0.054
http	dcs-lig-httpd		18	0.054
http	WebLogic httpd		17	0.051
http	Intoto httpd	1.0	17	0.051
http	httpd		17	0.051
http	Apache	2.2.11	17	0.051
http	NetBox httpd	2.8 Build 4128	16	0.048
http	Httpd	1.0	16	0.048
http	Apache	2.0.52	16	0.048
http	Allegro RomPager	4.30b3	16	0.048
ftp	vsftpd (before 2.0.8) or WU-FTPD		16	0.048
vnc	RealVNC Enterprise		15	0.045
http	TP-LINK Router		15	0.045
http	MikroTik router http config		15	0.045
eggdrop	Eggdrop IRC bot console	1.6.20	15	0.045
directconnect	Direct Connect P2P		15	0.045