The problem that you are having are limitations on your router. The 851 does not support the zone based firewall. This feature is supported with the advanced IP services IOS... which unfortunately is not available for the 851. There is a known bug within SDM that tries to configure the zone based firewall even if the router doesn't support the Zone-based firewall. If you do find this a necessity I would recommend the 871 router that will support the firewall and many other features.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
Im studying the 100-105 book by Odom and am currently on the topic of Port security. I purchased a used 2960 and I'm trying to follow a...
While deploying a number of 18xx/2802/3802 model access points (APs), which run AP-COS as their operating platform. It can be observed on some occasions that while many of their access points were able to join the fabric WLC withou...
I am going to design and build an LAN network under a tunnel underground with long distance between the switches.
I will have 2 Catalyst switches and 8 Industrial IE3000, and they will be connected with fiber.
For now I am planning on use Layer-2 s...