A simple tcp port scanner and banner grabber. Logs output as json.

You probably want to be using massscan.

Usage:

      --banner-timeout duration   timeout when fetching banner (default 2s)
      --debug                     sets log level to debug
  -x, --exclude stringSlice       cidr blocks to exclude
      --parallel                  Scan multiple ports on each host in parallel
  -p, --port stringSlice          ports to scan. ex: 80,443,8000-8100
      --pretty                    use pretty logs
      --rate int                  rate in attempts/sec (default 1000)
      --timeout duration          Scan connection timeout (default 2s)

Example:

$ ./bannerscanner -p 22,53 192.168.2.0/28
{"level":"info","state":"open","host":"192.168.2.10","port":22,"banner":"SSH-2.0-nope\n","time":"2018-05-16T16:46:17-04:00","message":"found service"}
{"level":"info","state":"open","host":"192.168.2.11","port":22,"banner":"SSH-2.0-nope\r\nProtocol mismatch.\n","time":"2018-05-16T16:46:17-04:00","message":"found service"}
{"level":"info","state":"open","host":"192.168.2.1","port":22,"banner":"SSH-2.0-nope\r\n","time":"2018-05-16T16:46:17-04:00","message":"found service"}
{"level":"info","state":"open","host":"192.168.2.1","port":53,"banner":"","time":"2018-05-16T16:46:19-04:00","message":"found service"}