Do you mean Time Capsule.. as you really cannot port forward time machine.
What ports do the Insteon system use.. sorry never heard of it or even know what it is?
Is the TC the main and only router in the network? If not you will not get it working.
Yes, sorry, it is a Time Capsule. The Insteon is a a network for controlling home devices and is controlled by a Smartlinc network controller (http://www.smarthome.com/2412N/SmartLinc-INSTEON-Central-Controller/p.aspx). The documentation does not mention specific ports - only the usual IP and MAC addresses which worked originally with my Linksys Router. Now that I have an MiniMac and the Time Capsule, the setting are more complex.
Port Forwarding is not required and not useful at all within a LAN.. It is only for crossing the NAT.
This is probably one of those Apple Networking things.. the Insteon cannot work because your naming of the network is not SMB compliant.
Reset the TC to factory.
Give the TC and wireless SMB compliant names.. short, no spaces, no apostophe indeed no non-alphanumeric characters at all.
Eg.. name of the TC.. TCPete
Wireless name.. TC24ghz and TC5ghz (use separate names for the two bands)
Security password and passkey can be 8-12 characters.. but still need straight alphanumeric mix of numbers and letters.
Make sure the IP of the Insteon unit is set to dhcp or if you set statically is in the same IP subnet as the TC.
Make sure you can ping the device on the network from any computer.. if you can, ping from the device back to the network.
Tell me if that gets you anywhere.
Renamed the TC and the Network (could only find one of them - all mine are G class) as TimeCapsule and AppleNetwork - no joy.
Also retried adding the IPv6 firewell address to the Smartlinc's IP/MAC as well - still no joy.