How to Secure Your Network with Cisco Routers
- Security passwords configuration
- Passphrases configuration
- Secure administrative access
- Secure Telnet and SSH
- Maintain Router activity logs
Before we look at how to secure Cisco routers, let’s briefly summarise the role routers play in network security
The Role of Routers in Network Security
As you must know, routers are used for forwarding traffic between different networks based on Layer 3 IP addresses and provide access to network segments and subnetworks. So that makes routers the definite targets for network attackers.
When the border router of an organisation’s network is compromised or accessed by an unauthorised user, it poses a potential threat to its sensitive information and other network services and resources.
Routers can be compromised in many ways, (Trust exploitation and MITM attacks) and this exposes the internal network configuration or components to scans and attacks.
In summary, there are two primary roles router plays in a network:
- Advertise networks and filter (permit/deny) who can use them.
- Provide access to network segments and subnetworks.
However, when a network router is breached; firstly, unauthorized access may be granted, enabling malicious individuals or users to infiltrate sensitive information or perpetrate cyber-attacks.
The compromise of a router can prompt the manipulation or interception of data in transit, thereby compromising data integrity and confidentiality.
In addition, a compromised router could be remotely used for redirecting network traffic, leading to potential service disruptions or the diversion of data to malicious destinations.
- Security Passwords and Passphrases Configuration and Encryption
- How To Configure Switch Security
- Administrative Access Security
- Telnet and SSH Security
- Maintain Router Activity Logs
