I have a 2621 configured with the serial interface to the outside world, ethernet 0/0 to DMZ2, ethernet 0/1 to DMZ1, and using ios firewall. When I am connected to DMZ2 I can make FTP communications to the outside world uploading and downloading. W...

Theory has it that a private network connected to the internet should have an outside firewall with a DMZ between that firewall and a secondary firewall. Something like this, a Cisco router connected on the ext interface to the internet, the interna...