1. Working at a Small-to-Medium Business or ISP – Chapter 8
ISP Responsibility
Working at a Small-to-Medium Business or ISP – Chapter 8

2. 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.

3. ISP Security Considerations
Helping clients to create secure passwords
Securing applications
Removing vulnerabilities
Configuring firewalls
Performing security scans

4. ISP Security Considerations
Common security practices:
Encrypting data stored on servers
Using permissions to secure access
Implement user accounts
Assign levels of access

5. ISP Security Considerations
Three steps used to reduce network vulnerability:
Authentication
Authorization
Accounting

6. ISP Security Considerations
Encryption: use the secure version of a protocol whenever confidential data is being exchanged

7. Security Tools
Access control lists and port filtering protect against DoS and DDoS attacks

8. Security Tools
Firewalls use ACLs to control which traffic is passed or blocked

9. Security Tools Intrusion Detection System (IDS)
Intrusion Prevention System (IPS)

10. Security Tools Wireless security: Changing default settings
Enabling authentication
MAC filtering
Encryption

11. Security Tools
Host-based firewalls control inbound and outbound network traffic

12. Security Tools Targets of host security: Known attacks
Exploitable services
Worms and viruses
Back doors and Trojans

13. Monitoring and Managing the ISP
Typical features of a Service Level Agreement (SLA):

14. Monitoring and Managing the ISP
Monitoring network link performance

15. Monitoring and Managing the ISP
In-band management:
Telnet Virtual Terminal (VTY) session
Secure Shell (SSH): preferred for security

16. 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

17. Backups and Disaster Recovery
Factors in choosing backup media:
Amount of data
Cost of media
Performance
Reliability
Ease of offsite storage

18. Backups and Disaster Recovery
Methods of file backup:
Normal
Differential
Incremental

19. Backups and Disaster Recovery
How to ensure successful backups:
Swap media
Review backup logs
Trial restores
Drive maintenance

20. Backups and Disaster Recovery
Use TFTP to protect configurations and Cisco IOS software
Restore a Cisco IOS image using TFTP in ROMmon mode

21. Backups and Disaster Recovery
Steps to designing an effective recovery plan:

22. Backups and Disaster Recovery
Phases to creating and implementing a disaster recovery plan:

23. 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.