Overview of services running on Port 2525 TCP.
~293 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
smtp						68979	23.466
smtp	PowerMTA smtpd	3.5r15				59490	20.238
smtp	Exim smtpd	4.77				35789	12.175
smtp	Postfix smtpd					35486	12.072
smtp	Exim smtpd	4.69				15756	5.36
no match						7583	2.58
smtp	Exim smtpd					6973	2.372
smtp	Sendmail	8.13.1/8.13.1		Unix		4915	1.672
smtp	Microsoft ESMTP	6.0.3790.4675		Windows		4643	1.579
http						3916	1.332
smtp	Microsoft Exchange smtpd			Windows		3704	1.26
irc	Dancer ircd					3692	1.256
http	SonicWALL				firewall	3526	1.2
smtp	PowerMTA smtpd	3.5r13				2802	0.953
http	Dart WebServer Tool	1.0				2120	0.721
telnet	Cisco IOS telnetd			IOS	switch	2080	0.708
eggdrop	Eggdrop IRC bot console	1.6.21				1965	0.668
smtp	Sendmail	8.13.8/8.13.8		Unix		1703	0.579
chat	AIM or ICQ server					1562	0.531
telnet						1336	0.454
smtp	Sendmail		Not accepting mail			1263	0.43
http	Apache	2.2.8	(Ubuntu) PHP/5.2.4-2ubuntu5.24 with Suhosin-Patch			1031	0.351
smtp	PowerMTA smtpd	3.5r16				852	0.29
smtp	Symantec Enterprise Security manager smtpd					812	0.276
http	AIM	1.0				665	0.226
smtp	Microsoft ESMTP	6.0.3790.3959		Windows		621	0.211
smtp	PowerMTA smtpd	3.5r17				546	0.186
smtp	Exim smtpd	4.76				534	0.182
http	lighttpd	1.4.29				433	0.147
smtp	Microsoft ESMTP	7.0.6002.18264		Windows		422	0.144
smtp	Communigate Pro SMTP	4.2.4				405	0.138
smtp	Sendmail	8.14.3/8.14.3		Unix		395	0.134
http	lighttpd	1.4.19				372	0.127
smtp	Microsoft ESMTP	7.5.7601.17514		Windows		361	0.123
http-proxy	EZproxy web proxy					360	0.122
smtp	Sendmail	8.11.6/8.11.6		Unix		335	0.114
smtp	rblsmtpd wrapped smtpd		Connecting from banned IP			328	0.112
smtp	MailEnable smptd	5.10--		Windows		317	0.108
smtp	PowerMTA smtpd	4.0r1				313	0.106
smtp	Sendmail	8.12.11.20060308/8.12.11		Unix		309	0.105
http	Gateway-Webs					295	0.1
smtp	Communigate Pro SMTP	5.1.12				263	0.089
smtp	MailEnable smptd	1.986--		Windows		253	0.086
smtp	Surgemail smtpd	5.3h2-2				242	0.082
smtp	Exim smtpd	4.74				232	0.079
http	Microsoft IIS httpd	6.0		Windows		222	0.076
smtp	Exim smtpd	4.72				201	0.068
smtp	Sendmail	8.14.4/8.14.4		Unix		195	0.066
smtp	Exim smtpd	4.63				181	0.062
telnet	Cisco 1721 router telnetd			IOS	router	165	0.056
smtp	Microsoft ESMTP	6.0.3790.1830		Windows		160	0.054
smtp	Microsoft Exchange 2010 smtpd		not available			150	0.051
smtp	MailEnable smptd	4.26--		Windows		148	0.05
http	GoAhead-Webs embedded httpd					144	0.049
smtp	Cisco PIX sanitized smtpd				firewall	135	0.046
smtp	Microsoft Exchange smtpd		disabled	Windows		121	0.041
smtp	MailEnable smptd	0-3.63-		Windows		120	0.041
smtp	IMail NT-ESMTP	11.5 1-1		Windows		120	0.041
smtp	Microsoft ESMTP	5.0.2195.7381		Windows		116	0.039
http	Avtech AVN801 network camera	1.0	UPnP 1.0		webcam	116	0.039
smtp	IceWarp smtpd	10.0.7				113	0.038
smtp	Sendmail	8.12.11/8.12.11		Unix		112	0.038
http	DrcomServer1.0					112	0.038
http	Netwave IP camera http config				webcam	109	0.037
smtp	Communigate Pro SMTP	5.0.14				105	0.036
smtp	Sendmail	8.12.10/8.12.10		Unix		103	0.035
http	Cassini	4.0.0.0				102	0.035
smtp	IMail NT-ESMTP	11.0 1-1		Windows		100	0.034
smtp	MailEnable smptd	0-2.53-		Windows		98	0.033
http	Apache Tomcat/Coyote JSP engine	1.1				95	0.032
http	GoAhead-Webs					88	0.03
smtp	MailEnable smptd	6.54--6.54		Windows		86	0.029
ssh			protocol 1.5			83	0.028
postgrey	Postfix Greylist Daemon					83	0.028
http	Microsoft IIS httpd	7.5		Windows		83	0.028
http	Apache	1.3.6				79	0.027
http	thttpd	2.24 26oct2003				76	0.026
smtp	Exim smtpd	4.80				75	0.026
smtp	Sendmail	8.14.2/8.14.2		Unix		71	0.024
smtp	JAMES smtpd	2.3.2				71	0.024
ssh	OpenSSH	4.3	protocol 2.0			70	0.024
smtp	MDaemon smtpd	9.6.3	Unregistered	Windows		70	0.024
smtp	IMail NT-ESMTP	11.02 1-1		Windows		70	0.024
smtp	Microsoft ESMTP	7.0.6001.18000		Windows		69	0.023
smtp	Alt-N MDaemon mail server	12.5.6		Windows		68	0.023
ftp	Microsoft ftpd			Windows		68	0.023
http	Buffalo AirStation http config				WAP	65	0.022
smtp	MailEnable smptd	0-1.87-		Windows		64	0.022
smtp	Communigate Pro SMTP	5.1.16				64	0.022
smtp	Sendmail	8.8.7/8.8.7		Unix		63	0.021
smtp	Surgemail smtpd	5.3h-1				62	0.021
smtp	MailEnable smptd	0-2.40-		Windows		61	0.021
smtp	MailEnable smptd	1.983--		Windows		59	0.02
http-proxy	CCProxy http proxy		unauthorized	Windows		59	0.02
http	Apache					57	0.019
smtp	MailEnable smptd	6.0--		Windows		56	0.019
http	PDR-M800	1.0				56	0.019
smtp	Sendmail	8.13.7/8.13.7		Unix		55	0.019
smtp	Axigen smtpd			Unix		55	0.019
smtp	MailEnable smptd	--4.26		Windows		54	0.018
smtp	Sendmail	8.14.5/8.14.5		Unix		53	0.018
smtp	MailEnable smptd	0-4.26-		Windows		52	0.018
http	WangWnagSimpleServer	1.0				52	0.018
smtp	MailEnable smptd	--3.63		Windows		49	0.017
http	Boa HTTPd	0.94.14rc21				48	0.016
smtp	Barracuda Networks Spam Firewall smtpd					47	0.016
smtp	MailEnable smptd	4.17--4.17		Windows		46	0.016
smtp	MailEnable smptd	1.95--		Windows		46	0.016
smtp	Alt-N MDaemon mail server	11.0.3		Windows		46	0.016
http	Microsoft IIS httpd	7.0		Windows		46	0.016
smtp	Microsoft ESMTP	5.0.2195.6713		Windows		45	0.015
smtp	Kerio Connect smtpd	7.4.1				45	0.015
smtp	Sendmail	8.14.1/8.14.1		Unix		44	0.015
smtp	Kerio Connect smtpd	7.4.0				43	0.015
http	mini_httpd	1.19 19dec2003				43	0.015
smtp	Lotus Domino smtpd	8.5.3				42	0.014
mongodb	MongoDB	1				42	0.014
vnc	VNC		protocol 3.8			41	0.014
smtp	MailEnable smptd	5.51--		Windows		41	0.014
smtp	Communigate Pro SMTP	4.2.10				41	0.014
remoting	MS .NET Remoting services					41	0.014
ssh	OpenSSH	5.1p1 Debian 5	protocol 2.0	Linux		39	0.013
smtp	XMail SMTP server	1.27				37	0.013
smtp	MailEnable smptd	0-3.62-		Windows		37	0.013
smtp	Communigate Pro SMTP	5.4.4				36	0.012
smtp	Exim smtpd	4.66				35	0.012
http	GeoVision GeoHttpServer for webcams				webcam	35	0.012
http	Apache		SSL-only mode			35	0.012
smtp	MailEnable smptd	6.56--		Windows		34	0.012
smtp	MailEnable smptd	1.981--		Windows		34	0.012
smtp	MailEnable smptd	0-1.82-		Windows		34	0.012
smtp	MailEnable smptd	4.23--		Windows		33	0.011
smtp	MailEnable smptd	3.62--		Windows		33	0.011
smtp	MailEnable smptd	0-5.51-		Windows		33	0.011
http	Apache	2.2.3	(CentOS)			33	0.011
smtp-proxy	ESET NOD32 anti-virus smtp proxy					32	0.011
smtp	Alt-N MDaemon mail server	11.0.0		Windows		32	0.011
http	thttpd	2.25b 29dec2003				32	0.011
smtp	Sendmail	8.12.8/8.12.8		Unix		30	0.01
smtp	MailEnable smptd	0-3.6-		Windows		30	0.01
smtp	Alt-N MDaemon mail server	10.0.0		Windows		30	0.01
http	Microsoft IIS httpd					30	0.01
ssh	OpenSSH	5.3	protocol 2.0			29	0.01
smtp	Alt-N MDaemon mail server	6.8.5		Windows		29	0.01
irc-proxy	psyBNC	2.3.2-9				29	0.01
http	uc-httpd	1.0.0				29	0.01
bittorrent	Bittorrent P2P client					29	0.01
ssh	NetScreen sshd		protocol 2.0		firewall	28	0.01
smtp	Surgemail smtpd	5.2a-1				27	0.009
smtp	Microsoft ESMTP	7.5.7600.16601		Windows		27	0.009
smtp	MailEnable smptd	4.22--		Windows		27	0.009
smtp	IA Mailserver smtpd			Windows		27	0.009
smtp	Exim smtpd	4.73				27	0.009
smtp	Dumbster fake smtpd					27	0.009
smtp	Cisco IronPort C160 firewall smtpd			AsyncOS		27	0.009
http	Cassini	5.0.0.0				27	0.009
smtp	MailEnable smptd	5.11--		Windows		26	0.009
smtp	MailEnable smptd	4.26--4.26		Windows		26	0.009
nntp	INN nntpd		posting ok			26	0.009
http	D-Link DIR-300 WAP http admin				WAP	26	0.009
smtp	Alt-N MDaemon mail server	12.0.3		Windows		25	0.009
http	uTorrent WebUI			Windows		25	0.009
http	Cross Web Server					25	0.009
http	MikroTik router config httpd			RouterOS	router	24	0.008
http	Hikvision-Webs					24	0.008
ftp	zFTPServer	5.0 build 2009-03-12		Windows		24	0.008
ssh	OpenSSH	5.2	protocol 2.0			23	0.008
smtp	Kerio Connect smtpd	7.3.2				23	0.008
http	Intoto httpd	1.0				23	0.008
http	Gadspot/Avtech AV787 webcam http config				webcam	23	0.008
ssl	TLS	1.0				22	0.007
smtp	MAILsweeper SMTP proxy					22	0.007
smtp	MailEnable smptd	6.53--		Windows		22	0.007
smtp	MailEnable smptd	6.03--		Windows		22	0.007
smtp	MailEnable smptd	0-5.11-		Windows		22	0.007
smtp	MailEnable Enterprise smptd	2.53		Windows		22	0.007
http	Microsoft HTTPAPI httpd	2.0	SSDP/UPnP	Windows		22	0.007
http	Boa HTTPd	0.94.13				22	0.007
smtp	MailEnable smptd	5.5--5.5		Windows		21	0.007
smtp	MailEnable smptd	0-5.01-		Windows		21	0.007
smtp	Kerio Connect smtpd	7.3.1 patch 2				21	0.007
smtp	Exim smtpd	4.67				21	0.007
telnet	Cisco router telnetd			IOS	router	20	0.007
smtp	Kerio Connect smtpd	7.4.2				20	0.007
smtp	IceWarp smtpd	9.1.0				20	0.007
smtp	ArGoSoft Mail Server Plus	1.8.9.2		Windows		20	0.007
ftp	vsftpd	2.0.8 or later				20	0.007