But either way, you need to do whatever you can to protect your routers from a dictionary DoS attack, which attackers could use to gain access to your router or simply create a service outage on your network.

 

Thanks to login enhancements in IOS 12.3(4)T and later, you can provide your routers with additional protection. These new login enhancements offer the following benefits:

  • Create delays between successive login attempts.
  • Disallow login if there are too many failed login attempts.
  • Create messages in the system log or send SNMP traps that alert/record additional information about the failed and disallowed logins.
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