Reduce SSH brute force attacks by changing your default SSH server (sshd) port from port 22 to a different one. Below is a sshd log example of a brute force attacks. Changing the port You can change the default port by editing the sshd configuration file. sudo nano /etc/ssh/sshd_config Find the line that say #Port. Remove the # symbol and set the port number you prefer. Refer to the image below as reference....
Some Linux servers were security hardened by changing the default SSH port from port 22 to a different port number. To use rsync with a different SSH port, add ‘ssh -p 12345’ in the rsync parameters. Push rsync -azvP -e 'ssh -p 12345' SOURCE USER@HOST:DEST Pull rsync -azvP -e 'ssh -p 12345' USER@HOST:SOURCE DEST
If your SSH connection to your Raspberry Pi is freezing or unstable it could be because of OpenSSH TOS (Type of Service). To fix this, add IPQoS cs0 cs0 in the sshd configuration file. Open your /etc/ssh/sshd_config and add IPQoS cs0 cs0 at the bottom of the file. Please refer to the example configuration file below. # $OpenBSD: sshd_config,v 1.103 2018/04/09 20:41:22 tj Exp $ # This is the sshd server system-wide configuration file....