scanssh(1) BSD General Commands Manual scanssh(1)NAMEscanssh — scans the Internet for open proxies and SSH servers
SYNOPSISscanssh [-VIERph] [-s scanners,...] [-n ports,...] [-u socks hosts,...]
[-e excludefile] addresses...
DESCRIPTION
ScanSSH scans the given addresses and networks for running services. It
mainly allows the detection of open proxies and Internet services. For
known services, ScanSSH will query their version number and displays the
results in a list.
The adresses can be either specified as an IPv4 address or an CIDR like
IP prefix, ipaddress/masklength. Ports can be appended by adding a colon
at the end of address specification.
Additionally, the following two commands can be prefixed to the address:
random(n[,seed])/ The random command selects random address from the
address range specified. The arguments are as fol‐
lows: n is the number of address to randomly create in
the given network and seed is a seed for the pseudo
random number generator.
split(s,e)/ The split command is used to split the address range
in several unique components. This can be use to scan
from serveral hosts in parallel. The arguments are as
follows: e specifies the number of hosts scanning in
parallel and s is the number of the host this particu‐
lar scan runs on.
The options are as follows:
-V Causes scanssh to print its version number.
-I Does not send a SSH identification string.
-E Exit the program, if the file containing the addresses
for exclusion can not be found.
-R If addresses are generated at random, this flag causes
the program to ignore excluded addresses from the exclude
file. The default behaviour is to always exclude
addresses.
-p Specifies that ScanSSH should operate as a proxy detec‐
tor. This flag sets the default modes and default scan‐
ners to detect open proxies.
-h Displays the usage of the program.
-n ports,... Specifies the port numbers to scan. Ports are separated
by commas. Each specified scanner is run for each port
in this list. The default is 22.
-u socks hosts,...
A list of comma separated host:port pairs of SOCKS prox‐
ies that scanssh should use to scan through.
-s scanners Specifies a number of scanners should be executed for
each open port. Multiple scanners are separated by com‐
mas. The following scanners are currently supported:
ssh Finds versions for SSH, Web and SMTP
servers.
socks5 Detects if a SOCKS V5 proxy is running on
the port.
socks4 Detects if a SOCKS V4 proxy is running on
the port.
http-proxy Detects a HTTP get proxy.
http-connect Detects a HTTP connect proxy.
telnet-proxy Detects telnet based proxy servers.
-e excludefile Specifies the file that contains the addresses to be
excluded from the scan. The syntax is the same as for
the addresses on the command line.
The output from scanssh contains only IP addresses. However, the IP
addresses can be converted to names with the logresolve(8) tool included
in the Apache webserver.
EXAMPLES
The following command scans the class C network 10.0.0.0 - 10.0.0.255 for
open proxies:
scanssh-p 10.0.0.0/24
The next command scans for ssh servers on port 22 only:
scanssh-n 22 -s ssh 192.168.0.0/16
The following command can be used in a parallel scan. Two hosts scan the
specified networks randomly, where this is the first host:
scanssh 'random(0,rsd)/split(1,2)/(192.168.0.0/16 10.1.0.0/24):22,80'
BUGS
At the moment, scanssh leaves a one line entry in the log file of the ssh
server. It is probably not possible to avoid that.
BSD July 17, 2000 BSD
