h this cruft -i secs delay interval for lines sent, ports scanned -l listen mode, for inbound connects -L listen harder, re-listen on socket close -n numeric-only IP addresses, no DNS -o file hex dump of traffic -p port local port number -r randomize local and remote ports -s addr local source address -t answer TELNET negotiation -u UDP mode -v verbose (use twice to be more verbose) -w secs timeout for connects and final net reads -z zero-I/O mode (used for scanning) port numbers can be individual or ranges: m-n (inclusive) Connect to a port on a remote host nc remote_host Connect to multiple ports on a remote host nc remote_host. e prog inbound program to exec (dangerous!!) -g gateway source-routing hop point(s), up to 8 -G num source-routing pointer: 4, 8, 12.
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