Defending your network against attack requires vigilance and education. The following are best practices for securing a network:
Develop a written security policy for the organization.
Shut down unused services and ports.
Use strong passwords and change them often.
Control physical access to devices.
Avoid using standard insecure HTTP websites, especially for login screens; instead use the more secure HTTPS.
Perform backups and test the backed up files on a regular basis.
Educate employees about social engineering attacks, and develop policies to validate identities over the phone, via email, and in person.
Encrypt and password-protect sensitive data.
Implement security hardware and software, such as firewalls.
Keep software up-to-date by installing security patches weekly or daily, if possible.
These methods are only a starting point for security management. Organizations must remain vigilant at all times to defend against continually evolving threats. Use network security tools to measure the vulnerability of the current network.
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