Difference between revisions of "Netcat"
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| − | Netcat is the swiss army knife of the hackers. Netcat is used for file (exploit) transfer, finding open ports & remote administration (Bind & Reverse Shells). You can manually connect to any network service like HTTP using netcat. Another utility is to listen on any | + | Netcat is the swiss army knife of the hackers. Netcat is used for file (exploit) transfer, finding open ports & remote administration (Bind & Reverse Shells). You can manually connect to any network service like HTTP using netcat. Another utility is to listen on any [[UDP]]/[[TCP]] ports on your machine for any incoming connections. |
* Windows: <code>[[ncat]].exe</code> | * Windows: <code>[[ncat]].exe</code> | ||
| Line 11: | Line 11: | ||
* <code>echo "text to send" | nc 10.10.10.10 54</code> | * <code>echo "text to send" | nc 10.10.10.10 54</code> | ||
| − | * Forward port: | + | * Forward port (see also <code>[[socat]]</code>): |
:<code>nc -l -p ORIGIN_PORT -c 'nc DESTINATION_IP DESTINATIO_PORT'</code> | :<code>nc -l -p ORIGIN_PORT -c 'nc DESTINATION_IP DESTINATIO_PORT'</code> | ||
:<code>nc -l -p 2222 -c 'nc 10.10.10.4 8888'</code> | :<code>nc -l -p 2222 -c 'nc 10.10.10.4 8888'</code> | ||
| − | :<code> | + | :<code>nc <IPaddress or FQDN> <port number></code> |
| + | |||
| + | |||
| + | [[nc]] -vnzu 5x.253.51.xxx 4501 | ||
| + | Connection to 5x.253.51.xxx 4501 port [udp/*] succeeded! | ||
| + | -u Use UDP | ||
| + | [[nc -v|-v]] verbose | ||
| + | -z specifies that nc should just scan for listening daemons, without sending any data to them | ||
| + | |||
| + | nc -zv google.com 80 | ||
| + | Connection to google.com 80 port [tcp/http] succeeded! | ||
| + | |||
| + | nc -zv google.com 443 | ||
| + | Connection to google.com 443 port [tcp/https] succeeded! | ||
| + | |||
| + | [[UDP]] (-u) | ||
| + | nc -u XXXXX | ||
== Related commands == | == Related commands == | ||
* <code>[[iperf]]</code> | * <code>[[iperf]]</code> | ||
* <code>[[pv]] </[[dev]]/[[zero]] | ssh REMOTE_SERVER 'cat >/dev/[[null]]'</code> | * <code>[[pv]] </[[dev]]/[[zero]] | ssh REMOTE_SERVER 'cat >/dev/[[null]]'</code> | ||
| + | * <code>[[nping]]</code> | ||
| + | * <code>[[netstat]]</code> | ||
== See also == | == See also == | ||
| Line 25: | Line 43: | ||
* {{netcat}} | * {{netcat}} | ||
* {{nmap}} | * {{nmap}} | ||
| − | |||
[[Category:Linux]] | [[Category:Linux]] | ||
Latest revision as of 12:45, 12 December 2023
Netcat is the swiss army knife of the hackers. Netcat is used for file (exploit) transfer, finding open ports & remote administration (Bind & Reverse Shells). You can manually connect to any network service like HTTP using netcat. Another utility is to listen on any UDP/TCP ports on your machine for any incoming connections.
nc examples[edit]
echo "text to send" | nc IP portecho "text to send" | nc 10.10.10.10 54
- Forward port (see also
socat):
nc -l -p ORIGIN_PORT -c 'nc DESTINATION_IP DESTINATIO_PORT'nc -l -p 2222 -c 'nc 10.10.10.4 8888'
nc <IPaddress or FQDN> <port number>
nc -vnzu 5x.253.51.xxx 4501 Connection to 5x.253.51.xxx 4501 port [udp/*] succeeded! -u Use UDP -v verbose -z specifies that nc should just scan for listening daemons, without sending any data to them
nc -zv google.com 80 Connection to google.com 80 port [tcp/http] succeeded!
nc -zv google.com 443 Connection to google.com 443 port [tcp/https] succeeded!
UDP (-u) nc -u XXXXX
Related commands[edit]
See also[edit]
- OpenSSH (changelog):
/etc/ssh/sshd_config|/etc/ssh/ssh_config|~/.ssh/|openSSL | sshd logs|sftp|scp|authorized_keys|ssh-keygen|ssh-keyscan|ssh-add|ssh-agent|ssh|Ssh -O stop|ssh-copy-id|CheckHostIP|UseKeychain, OpenSSF telnet,netcat, nc, nc -l,ncat,socat, ngrok- Security tools: Vulnerability scanner, port scan, Host sweep,
nmap,nping,ncat, nc,psad, Gordon Lyon
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