4/11/2023 0 Comments Quiterss reset to default![]() ![]() shell> firewall-cmd -zone=public -add-port=50150 -permanent Now we will configure Firewall to allow this port.įor Iptables: shell> iptables -A INPUT -p tcp -m tcp -dport 50150 -j ACCEPTįor Firewalld. We will change it to some random Private Port number from 49152 through 65535.Įdit the /etc/ssh/sshd_config file and change this line: To # The default requires explicit activation of protocol 1īy default, SSH listens for connections on Port 22 which is the first port Attackers use to attack. To use SSHv2 we can edit /etc/ssh/sshd_config and change # The default requires explicit activation of protocol 1 SSHv2 has a number of new features like Encryption ciphers and support for public key certificates to provide more security. One of the most important things to do is use the secure version of SSH protocol > SSHv2. Now we can start editing SSH configuration file. shell> cp /etc/ssh/sshd_config /etc/ssh/sshd_config.$(date +%Y-%m-%d) we can edit /etc/ssh/sshd_config file to make it more secure.īefore making any changes to the sshd_config file we will take a backup of this file. The SSH server configuration files are located in /etc/ssh/ directory. shell> yum install openssh-server openssh-clients -y Type the following yum command to install OpenSSH client and server. To install OpenSSH, run these commands with superuser permissions in the terminal.įor Ubuntu/Debian, use: shell> apt-get install openssh-server openssh-client -y Here are a few things we can tweak in order to make OpenSSH server more secure. It’s very secure but we can still do some tweaks to make it more secure. SSH server is widely used for server authentication. We use OpenSSH tools almost daily for various tasks, from logging in to the remote server to transferring data between servers. sshd, ssh-agent and sftp-server for managing services.ssh-add, ssh-keyscan and ssh-keygen for creating and managing keys.ssh, scp and sftp for authentication and transferring data securely.The OpenSSH suite consists of many tools: ![]() Top 10 PHP Security best practices for Linux sys administrators.Configure AIDE-Advanced Intrusion Detection Environment to Secure your Server.Here are some other similar posts on security harden your Server and Applications which you should check. We can also implement SSH port forwarding to provide protection to data which would otherwise be transferred insecurely.įor more details, please read More About OpenSSH. OpenSSH is also known as OpenBSD Secure Shell, released under simplified BSD License, is used to provide secure network communications via encrypting network traffic.Įncrypting all traffic provides extra security from network sniffing and other attacks and it is available for multiple platforms.
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