First off, I'm a newbie to Cisco equipment. I'm a software developer by trade, working from home for my own company. I outgrew the router that my DSL provider gave me (SBC/AT&T) with my static service (5 static IPs) as I need to host some servers onsite and wanted a decent firewall. So, I read reviews online and purchased the Cisco 857.
I set this up yesterday using the wizard/installer that came with it. I have not enabled the firewall, and am currently using NAT across one of the external static IPs. Internally my network is 192.168.1.0/24.
When I plug in my old router, everything works fine. When I plug in the 857, I have the issues above. Hopefully somebody has some ideas that can send me in the right direction. I am decent with network equipment, and such. Many years ago I did have experience setting up and managing a Cisco 4000 series, but I've forgotten most of what I knew then. Let me know if you have any ideas on what might be wrong, or how I might be able to figure out what is wrong.