TCP Banner Grab
======
This utility will connect (TCP) to ip addresses provide over stdin, optionally
send them a small message, and wait for their response. The response is then
printed along with their IP address on stdout. Status messages appear on stderr.
USING:
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make
#echo -e -n "GET / HTTP/1.1\r\nHost: %s\r\n\r\n" > http-req
zmap -p 80 -N 1000 -o - | ./banner-grab-tcp -p 80 -c 100 -d http-req > http-banners.out
OPTIONS:
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-c, --concurent Number of connections that can be going on at once.
This, combined with timeouts, will decide the maximum
rate at which banners are grabbed. If this value
is set higher than 1000, you should use
`ulimit -SSn 1000000` and `ulimit -SHn 1000000` to
avoid running out of file descriptors (typically capped
at 1024).
-p, --port The port which to connect to hosts on
-t, --conn-timeout Connection timeout (seconds). Give up on a host if connect
has not completed by this time. Default: 4 seconds.
-r, --read-timeout Read timeout (seconds). Give up on a host if after
connecting (and optionally sending data), it does
not send any response by this time. Default: 4 seconds.
-v, --verbosity Set status verbosity. Status/error messages are outputed
on stderr. This value can be 0-5, with 5 being the most
verbose (LOG_TRACE). Default: 3 (LOG_INFO)
-f, --format Format to output banner responses. One of 'hex', 'ascii',
or 'base64'.
'hex' outputs ascii hex characters, e.g. 48656c6c6f.
'ascii' outputs ascii, without separators, e.g. Hello
'base64' outputs base64 encoding, e.g. SGVsbG8=
Default is base64.
-d, --data Optional data file. This data will be sent to each host
upon successful connection. Currently, this file does
not allow null characters, but supports up to 4
occurances of the current host's IP address, by replacing
%s with the string (inet_ntoa) of that host's IP address.
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