SING, or "Send ICMP Nasty Garbage.", is a tool that sends ICMP packets fully customized from the command line. Its main purpose is to replace and complement the ping command, adding certain enhancements as fragmentation, sending and receiving spoofed packets, sending many ICMP information types (echo as the old ping, address mask, timestamp, and router discovery) and errors (redirect, unreach, and time exceeded); and send monster packets. It also supports loose and strict source routing and record routing.
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