Setup a FOSCAM WiFi camera directly connected to a Mac via Ethernet

I have two FOSCAM WiFi IP cameras set up in my house (in addition to an outdoor Arlo I use for security purposes), and generally all three of these cameras give a reliable connection and work without much intervention.

Recently, however, one of the FOSCAM cameras decided to stop connecting to the wireless network. I needed to get access to the camera via the wired interface, but I didn't want to have to bring the camera all the way to where my wired networking drops were located, because it's in a bit of an inconvenient area of the basement in the midst of some cleanup we're doing.

So I plugged the FOSCAM directly into my Mac's USB 3.0 ethernet adapter, and got blinky lights... but couldn't connect to the camera because it's wired connection is configured to use DHCP by default, and there's no Bonjour/zeroconf configuration.

To get around this and directly connect to the camera, I did the following:

Setting a Static IP address with Raspbian Jessie Lite on the Raspberry Pi

In the midst of my work upgrading the Raspberry Pi Dramble to Raspbian Jessie Lite, I noticed one of the basic components of the architecture—static IP addresses for all the Raspberry Pis—was not working correctly anymore. My Ansible playbooks configured the /etc/network/interfaces file correctly, so it would define a static IP address for the eth0 interface (the built-in Ethernet port on the Pi):

auto lo

iface lo inet loopback

iface eth0 inet static

allow-hotplug wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
iface default inet dhcp

In the past, with Raspbian Wheezy, everything worked fine, and the Pi would (after a reboot) use the static IP address

AirPort Express - Flashing Yellow Light, Not Getting DHCP Address from Cable Modem

I spent the greater part of this afternoon trying to get my AirPort Express to connect to the Internet and share an IP address using a Motorola SB5101 Cable modem (with Charter Internet)... and since the solution was so simple and annoyingly stupid, I thought I'd post it here, for my reference and for anyone else spending an afternoon thinking his AirPort Express is dead.

As it turns out, the cable modem (this one, and likely many others) will only remember the MAC address of the first device it recognized when you last power cycled the modem.

When the Internet went down at my condo yesterday, I turned off my cable modem, plugged my Mac straight into it, turned the modem on, and use the internet via this direct connection for a while. When I plugged the AirPort Express back into the SB5101, I just got a flashing yellow (amber) light, and in the Airport Utility, a notice that the 'Internet Connection wasn't working'.

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