The MX100 has a dedicated management interface to access the local web page, but I think you can also access the local webpage when you have L3 access to the LAN IP of the MX. For that you'll have to set "
Remote device status pages" to "Enabled" in Network-Wide > General.
The docs specify the following:
You can toggle the LAN2 port between LAN and Internet, through Uplink configuration under the Local status tab.
Source:
https://documentation.meraki.com/MX/Installation_Guides/MX100_Installation_Guide
So only LAN Port 2.