Shulou(Shulou.com)06/03 Report--

This article will explain in detail how to use netcat for file transfer. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.

First, take a look at the help information.

$nc-hOpenBSD netcat (Debian patchlevel 1.105-7ubuntu1) This is nc from the netcat-openbsd package. An alternative nc is availablein the netcat-traditional package.usage: nc [- 46bCDdhjklnrStUuvZz] [- I length] [- I interval] [- O length] [- P source_port] [- Q seconds] [- s source] [- T toskeyword] [- V rtable] [- w timeout] [- X proxy_protocol] [- x proxy_address [: port]] [destination] [port] Command Summary:- 4 Use IPv4-6 Use IPv6-b Allow broadcast-C Send CRLF as line-ending-D Enable the debug socket option-d Detach from stdin-h This help text-I length TCP receive buffer length-i secs Delay interval for lines sent Ports scanned-j Use jumbo frame-k Keep inbound sockets open for multiple connects-l Listen mode For inbound connects-n Suppress name/port resolutions-O length TCP send buffer length-P proxyuser Username for proxy authentication-p port Specify local port for remote connects-q secs quit after EOF on stdin and delay of secs-r Randomize remote ports-S Enable the TCP MD5 signature option-s addr Local source address-T toskeyword Set IP Type of Service-t Answer TELNET negotiation-U Use UNIX domain socket-u UDP Mode-V rtable Specify alternate routing table-v Verbose-w secs Timeout for connects and final net reads-X proto Proxy protocol: "4" "5" (SOCKS) or "connect"-x addr [: port] Specify proxy address and port-Z DCCP mode-z Zero-I/O mode [used for scanning] Port numbers can be individual or ranges: lo-hi [inclusive]

Port scan:

$nc-z-v-n 127.0.0.1 20-100...Connection to 127.0.0.1 80 port [tcp/*] succeeded.

Simple file transfer:

Client:

$nc-l 192.168.1.11 1234 > passwd.txt &

Server:

$nc 192.168.1.11 1234 < / etc/passwd

Or it could be.

Cat / etc/passwd | nc 192.168.1.11 1234

The server ip is 192.169.1.11 and the port is 1234

In this way, it couldn't be better when two linux machines need to simply transfer files.

This is the end of the article on "how to use netcat for file transfer". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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