Contents
What is perimeter routing?
The perimeter router is typically a standard router providing a serial connection to the outside world and a LAN connection to the internal network. The perimeter router should provide any filtering of outside traffic to implement basic security for the dirty DMZ and preliminary filtering for the inside network.
What are the essential security hardening steps of router and switches?
Here are the essentials:
- Physically secure the routers.
- Lock down the router with passwords.
- Apply login mode passwords on Console, AUX, and VTY (telnet/ssh) interfaces.
- Set the correct time and date.
- Enable proper logging.
- Back up router configurations to a central source.
What are the perimeter devices?
A network perimeter includes:
- Border Routers: Routers serve as the traffic signs of networks.
- Firewalls: A firewall is a device that has a set of rules specifying what traffic it will allow or deny to pass through it.
How do you harden ports?
Network hardening: Ensure your firewall is properly configured and that all rules are regularly audited; secure remote access points and users; block any unused or unneeded open network ports; disable and remove unnecessary protocols and services; implement access lists; encrypt network traffic.
What does it mean to harden a Cisco router?
Hardening a router means that the router is secured against attacks as best as possible. This article discusses various means of making sure your routers are set up with maximum security, including manually hardening the router and router hardening with Cisco SDM.
How to harden your router with CCNA SEC?
Remember the following: SNMP version 1 and 2c transfer passwords (called community strings) in clear text—if security is required—consider SNMP version 3. HTTP authentication also sends clear text passwords—when needed, use HTTPS instead. Attackers can respond to broadcast DNS lookups—disable DNS when not in use or configure securely.
How can I disable an unused router interface?
Disable unused router interfaces—that’s right, find ANY interface that is not in use and make sure you issue the shutdown command You also should inspect the network management protocols in use in your network infrastructure. Remember the following:
What does it mean when a router is secured?
It means that the router is secured against attacks as best as possible. From secure, tough-to-crack passwords that are encrypted in the configurations, to the shutting down of unnecessary ports and services, the router has few vulnerabilities for would-be attackers to exploit. For example, the router has built-in web server capabilities.