SSHD

Jan 1, 0001

Definition

SSHD, or Secure Shell Daemon, is a server-side application that enables secure remote login and other secure network services over an unsecured network. It uses the Secure Shell (SSH) protocol to provide encrypted communication sessions, ensuring confidentiality and integrity of data exchanged between clients and servers. SSHD is commonly used for secure system administration, file transfers, and tunneling of network services.

Secure Settings Example

# /etc/ssh/sshd_config

# Disable root login for security
PermitRootLogin no

# Use protocol version 2 only
Protocol 2

# Limit authentication methods to public key
PasswordAuthentication no
PubkeyAuthentication yes

# Specify allowed users
AllowUsers user1 user2

# Enable logging for auditing
LogLevel VERBOSE

Insecure Settings Example

# /etc/ssh/sshd_config

# Allow root login, which can be a security risk
PermitRootLogin yes

# Allow password authentication, which is less secure
PasswordAuthentication yes

# Use default logging level, which may not capture enough detail
LogLevel INFO