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Learn about ISP security policies, tools for implementation, monitoring procedures, and responsibilities for maintenance and recovery. Explore common security practices such as creating secure passwords, application security, and vulnerability removal. Understand the importance of encryption, access permissions, and user account management. Discover steps to reduce network vulnerability through authentication, authorization, and accounting. Familiarize yourself with security tools like firewalls, IDS, IPS, and wireless security measures. Gain insights into monitoring network performance, in-band management, backup media selection, disaster recovery methods, and effective recovery plan design.
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ISP Responsibility Working at a Small-to-Medium Business or ISP – Chapter 8
Objectives • Describe ISP security policies and procedures. • Describe the tools used in implementing security at the ISP. • Describe the monitoring and managing of the ISP. • Describe the responsibilities of the ISP with regard to maintenance and recovery.
ISP Security Considerations • Helping clients to create secure passwords • Securing applications • Removing vulnerabilities • Configuring firewalls • Performing security scans
ISP Security Considerations Common security practices: • Encrypting data stored on servers • Using permissions to secure access • Implement user accounts • Assign levels of access
ISP Security Considerations Three steps used to reduce network vulnerability: • Authentication • Authorization • Accounting
ISP Security Considerations • Encryption: use the secure version of a protocol whenever confidential data is being exchanged
Security Tools • Access control lists and port filtering protect against DoS and DDoS attacks
Security Tools • Firewalls use ACLs to control which traffic is passed or blocked
Security Tools • Intrusion Detection System (IDS) • Intrusion Prevention System (IPS)
Security Tools Wireless security: • Changing default settings • Enabling authentication • MAC filtering • Encryption
Security Tools • Host-based firewalls control inbound and outbound network traffic
Security Tools Targets of host security: • Known attacks • Exploitable services • Worms and viruses • Back doors and Trojans
Monitoring and Managing the ISP • Typical features of a Service Level Agreement (SLA):
Monitoring and Managing the ISP • Monitoring network link performance
Monitoring and Managing the ISP In-band management: • Telnet Virtual Terminal (VTY) session • Secure Shell (SSH): preferred for security
Monitoring and Managing the ISP • SNMP enables administrators to gather data about the network • Syslog uses syslog clients to generate and forward log messages to syslog servers
Backups and Disaster Recovery Factors in choosing backup media: • Amount of data • Cost of media • Performance • Reliability • Ease of offsite storage
Backups and Disaster Recovery Methods of file backup: • Normal • Differential • Incremental
Backups and Disaster Recovery How to ensure successful backups: • Swap media • Review backup logs • Trial restores • Drive maintenance
Backups and Disaster Recovery • Use TFTP to protect configurations and Cisco IOS software • Restore a Cisco IOS image using TFTP in ROMmon mode
Backups and Disaster Recovery • Steps to designing an effective recovery plan:
Backups and Disaster Recovery • Phases to creating and implementing a disaster recovery plan:
Summary • ISPs provide desktop security services for customers, such as creating passwords, implementing patches and updates, and assigning permissions. • Many protocols offer secure versions utilizing digital encryption, which should be used when the data being exchanged is confidential. • Port filtering and Access Lists use TCP and UDP port features to permit or deny traffic. • Firewalls can utilize hardware or software to define what traffic can come into or go out of parts of a network. • ISPs are responsible for providing efficient and effective backup and disaster recovery methods for their customers.
