According to CERT/CC at Carnegie Mellon University, 80% of security incidents are caused by weak passwords. Extensive lists of default passwords are available online for most routers, and you can be sure that someone, somewhere knows your birthday. SecurityStats.com maintains a thorough do/don't list for passwords, as well as a password strength test.
Fortifying router security
Step 1: Change the default password!
Step 2: Disable IP directed broadcasts
Step 3: Disable HTTP configuration for the router, if possible
Step 4: Block ICMP ping requests
Step 5: Disable IP source routing
Step 6: Determine your packet filtering needs
Step 7: Establish Ingress and Egress address filtering policies
Step 8: Maintain physical security of the router
Step 9: Take the time to review the security logs
About the author
Chris Cox is a network administrator for the United States Army, based in Fort Irwin, California.
This tip originally appeared on SearchNetworking.com.