I've configured ip ip verify unicast reverse-path on a Cisco 2611 running 12.3(26) code. ip cef is enabled globally but turned off using the no ip route-cache cef command on all interfaces except the WAN facing interface (serial 0/0). !interface Se...

ip verify unicast source reachable-via uses the router's routing table to detect and prevent spoofing. On a border router with very few routes, and a static default route to the ISP's router, would verify unicast source reachable-via be effective? ...

I upgraded memory to 64 megabytes and code to version 12.3(26) on a Cisco 2611 Router, and now NTP will not synchronize. Here are some relevant parts of my configuration and debug commands and output:Router1#show verCisco Internetwork Operating Syst...