### Tool 51: Ping TCP

### Description:

      This tool checks if a host is up. It's done sending a probe packet and
      expecting a reply.
      This tool sends a TCP SYN to a computer. If host permits TCP, it will
      send back a TCP SYN-ACK (if port is open), or a TCP RST (if port is
      closed).
      Parameter --spoofip indicates how to generate link layer for spoofing.
      Values 'best', 'link' or 'raw' are common choices for --spoofip. Here
      is the list of accepted values:
       - 'raw' means to spoof at IP4/IP6 level (it uses system IP stack). If
         a firewall is installed, or on some systems, this might not work.
       - 'linkf' means to spoof at link level (currently, only Ethernet is
         supported). The 'f' means to Fill source Ethernet address.
         However, if source IP address is spoofed, it might be impossible
         to Fill it. So, linkf will not work: use linkb or linkfb instead.
       - 'linkb' means to spoof at link level. The 'b' means to left a Blank
         source Ethernet address (0:0:0:0:0:0, do not try to Fill it).
       - 'linkfb' means to spoof at link level. The 'f' means to try to Fill
         source Ethernet address, but if it is not possible, it is left
         Blank.
       - 'rawlinkf' means to try 'raw', then try 'linkf'
       - 'rawlinkb' means to try 'raw', then try 'linkb'
       - 'rawlinkfb' means to try 'raw', then try 'linkfb'
       - 'linkfraw' means to try 'linkf', then try 'raw'
       - 'linkbraw' means to try 'linkb', then try 'raw'
       - 'linkfbraw' means to try 'linkfb', then try 'raw'
       - 'link' is an alias for 'linkfb'
       - 'rawlink' is an alias for 'rawlinkfb'
       - 'linkraw' is an alias for 'linkfbraw'
       - 'best' is an alias for 'linkraw'. It should work in all cases.

      This tool may need to be run with admin privilege in order to sniff
      and spoof.

### Usage:

netwox 51 -i ip [-p port] [-s spoofip] [-c uint32] [-m uint32] [-b|+b] [-1|+1]

### Parameters:

parameter | description | example
`-i|--dst-ip ip` | destination IP address | 5.6.7.8
`-p|--dst-port port` | destination port number | 80
`-s|--spoofip spoofip` | IP spoof initialization type | best
`-c|--max-count uint32` | max requests | 4294967295
`-m|--max-ms uint32` | max millisecond wait | 1000
`-b|--beep|+b|--no-beep` | beep if reached |
`-1|--display01|+1|--no-display01` | display only 0 or 1 |

### Examples:

netwox 51 -i "5.6.7.8"
netwox 51 --dst-ip "5.6.7.8"