SSH (22)

Secure Shell.

Protocol Information

SSH (Secure Shell) is a remote administration protocol that offers encryption and is the successor to Telnet. It is generally used for remote access to servers and systems. SSH authentication can be configured in two main ways: user/password, or with key.

Port

22 TCP	SSH

Config File

• Linux: /etc/ssh/sshd_config

• Windows: %ProgramData%\ssh\sshd_config

Interact

If anonymous access is enabled, it's possible log in with username “Anonymous” and password “”.

ssh <USER>@<IP>

ssh -i <KEY> <USER>@<IP>

SSH Key

ssh-keygen

Move the public key in ~/.ssh/authorized_keys target machine (append if it already exists).

cat id_rsa.pub >> authorized_keys

Algorithm	Private Key	Public Key
RSA	id_rsa	id_rsa.pub
DSA (obsolete)	id_dsa	id_dsa.pub
ECDSA	id_ecdsa	id_ecdsa.pub
Ed25519 (recommended)	id_ed25519	id_ed25519.pub

Upload Key on Server SSH

ssh-keygen -f ~/.ssh/id_rsa -N ""
ssh-copy-id -i ~/.ssh/id_rsa.pub <USER>@<IP>

scp

scp [-r] [-O] <USER>@<IP>:/<REMOTE_FILE> /<TO_LOCAL>
scp [-r] [-O] /<LOCAL_FILE> <USER>@<IP>:/<TO_REMOTE>