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