I'm sorry but I understand nothing about what you describe compared to what you told us already.
There is no more cable modem in your description
vanished ?
It also looks like you defined internal Zentyal interface as external while external (ISP side) is not defined as external
Well, I'm totally lost...
Therefore I'll make some assumptions:
- you do not mention your cable modem because you successfully disabled "router" feature
- you decided
not to operate E2400 as a router, meaning you want devices attached to E2400 to access directly Zentyal internal interface (meaning on same network)
If above is correct, then you should have something like this:
ISP <-> cable modem <-> eth0 (DHCP 69.14.151.60), External WAN
checked) <-> Zentyal <-> eth1 (static 192.168.1.1, External WAN
UNchecked,
DHCP service configured for this interface) <-> Cisco E4200 Wireless Router (DHCP Turned Off) connected to Zentyal via LAN port.
If my assumptions were not correct, then you could set ip up like this:
ISP <-> (static 69.14.151.60) cable modem (static 192.168.100.1)<-> eth0 (DHCP 192.168.100.x), External WAN
checked) <-> Zentyal <-> eth1 (static 192.168.1.1, External WAN
UNchecked,
DHCP service configured for this interface) <-> Cisco E4200 Wireless Router (DHCP Turned Off) connected to Zentyal via LAN port.
then other designs exist for E2400: either connecting to LAN ports (DHCP turned off) or connected to WAN port, in such case, you can enable DHCP...