Viewpoint: vro Security Configuration Guide

While using vrouters, security issues have always been a topic of our relationship. Vro security configuration is also a skill we need to master. So I have studied the detailed knowledge of vro Security Configuration and some simple methods. I will share with you here, I hope it will be useful to you. If it weren't for Cisco's latest Security Warning, many network administrators have not yet realized that their router security configurations can become a hotspot for attacks. The vro operating system is as vulnerable to hacker attacks as the network operating system. The following are ten basic techniques to ensure vro security configuration.

1. Update your vro Operating System: Like a network operating system, the vro operating system also needs to be updated to correct programming errors, software flaws, and cache overflow problems. Always query the current update and operating system version from your vro manufacturer.

2. Modify the default password: According to the Computer Emergency Response Team of Carnegie Mellon University, 80% of security events are caused by weak or default passwords. Avoid using common passwords, and use a mix of uppercase and lowercase letters as stronger password rules.

3. Disable HTTP settings and SNMP (Simple Network Management Protocol): the HTTP settings of your router security configuration are easy for a busy network administrator. However, this is also a security problem for the vro security configuration. If your router security configuration has a command line setting, disable HTTP and use this setting method. If you do not use SNMP in your router security configuration, you do not need to enable this function. The Cisco router security configuration has an SNMP security vulnerability that is vulnerable to GRE tunnel attacks.

4. Blocking ICMP (Internet Control Message Protocol) ping requests: ping and other ICMP functions are very useful tools for network administrators and hackers. Hackers can use the ICMP feature enabled on your vro to find information that can be used to attack your network.

5. Disable telnet commands from the Internet: In most cases, you do not need active telnet sessions from Internet interfaces. If you access your vro from the inside, the security configuration will be safer.

6. Disable IP-targeted broadcast: IP-targeted broadcast allows you to launch denial-of-service attacks on your devices. The memory and CPU of A vro cannot withstand too many requests. This result may cause cache overflow.

7. Disable IP routing and IP redirection: retargeting allows data packets to come in from one interface and then exit from another interface. You do not need to redirect specially designed data packets to a dedicated internal network.

8. packet filtering: packet filtering only transmits the data packets that you are allowed to access your network. Many companies only allow port 80 (HTTP) and Port 110/25 (email ). In addition, you can block and allow IP addresses and ranges.

9. Review security records: by simply taking some time to review your record files, you will see significant attack methods and even security vulnerabilities. You will be surprised when you have experienced so many attacks.

10. Unnecessary Services: Never disable unnecessary services, whether on routers, servers, or workstation. Cisco devices provide small services by default through network operating systems, such as echo, chargen and discard ). These services, especially their UDP services, are rarely used for legal purposes. However, these services can be used to launch denial-of-service attacks and other attacks. Packet filtering can prevent these attacks.