Overview of services running on Port 256 TCP.
~12 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
ssh	Dropbear sshd	5496	45.425
no match	-/-	1806	14.927
chat	AIM or ICQ server	1468	12.133
fw1-topology	Checkpoint FireWall-1 Topology	1401	11.579
http	lighttpd	380	3.141
http		323	2.67
ssh	OpenSSH	173	1.43
http	Microsoft IIS httpd	161	1.331
fw1-secureremote	Checkpoint Firewall1 SecureRemote	136	1.124
http	Microsoft HTTPAPI httpd	109	0.901
ssh		94	0.777
telnet		47	0.388
vnc	VNC	36	0.298
http	Boa HTTPd	33	0.273
arcserve	ARCserve Discovery	31	0.256
ftp		29	0.24
http	MiniServ	28	0.231
mysql	MySQL	27	0.223
ftp	vsftpd	25	0.207
smtp	Microsoft ESMTP	23	0.19
ftp	Microsoft ftpd	19	0.157
ssh	MikroTik RouterOS sshd	18	0.149
http	nginx	18	0.149
smtp	Microsoft Exchange smtpd	13	0.107
ftp	FileZilla ftpd	13	0.107
ftp	Serv-U ftpd	10	0.083