3
4. Authentication
The RC-4A is securely accessed using the Digest Authentication procedure. There are two levels of access,
each requiring the entry of a username and password. The Guest level allows operation of the relays but not
programming of their default closure times or changes to username and password or network settings. The
Administrator level allows both relay operation and programming (see Programming sections A and B. The
default usernames andpasswords are listed below:
Guest username: guest Admin username: admin
Guest password: password Admin password: viking
There is one guest username and password available, and one admin username and password. It is
recommended that these be changed to unique values for better security. If you forget your username and
password, see C. DIP Switch Programming, Switch 3 to return to the original factory settings and reprogram
the usernames and passwords. Note: If secure login is not required, the RC-4A can be programmed to skip
authentication. See Operation Without Authentication on page 8.
B. Setting Up the RC-4A on the Network
1. Dynamic IP Address
The easiest way to get the RC-4A running on your local area network is to make use of the network’s ability
to automatically assign an IP address to the unit through a process referred to as DHCP. First, go to
https://www.vikingelectronics.info/downloadx/_install/RC-4A_Discoverer.zip and download the Viking RC-4A
Discoverer. Next, connect the RC-4A to the network using a network cable and power it up. The Status LED
will fast-flash for a few seconds while the unit initializes. When the Status LED is lit steady, start the discoverer
by double-clicking on the icon. The discoverer displays any RC-4’s or RC-4A’s it finds on the network. If more
than one is shown on the discoverer’s display, you can distinguish between them by comparing the MAC
address shown in the display with the MAC address printed on the unit’s network jack, or by looking at the
device name.
Important: If more than one RC-4A will be installed on the network, each unit must be assigned its own unique
device name to avoid unintentionally connecting with the wrong unit. See Settings section C. Network
Settings for more information.
To connect with the RC-4A, just click on the line corresponding to the unit you want to connect to and the
authentication page appears. See section 4. Authentication.
An Android version of the RC-4 Discoverer is available for free from the Google Play store.
https://play.google.com/store/apps/details?id=com.vikingelectronics.rc4discoverer
2. Device Name (Windows only)
An alternative way to access the RC-4A is to use its device name. When the RC-4A is connected to a network,
there is a device name associated with it. Most networks allow the user to address the unit using this device
name, which is a sort of nickname that can be used instead of typing in the full four-byte IP address of the unit.
The default device name of the RC-4A is MYVIKING. Type this into the address bar of your browser and press
enter or click on the arrow, then proceed to section 4. Authentication.
Important: If more than one RC-4A will be installed on the network, each unit must be assigned its own unique
device name to avoid unintentionally connecting with the wrong unit. See Settings section C. Network
Settings for more information.
3. Static IP Address
For applications that require a static IP address, first arrange with your network administrator for an address
on the server to be configured as a static IP address. Then use one of the above two methods to connect to
the RC-4A. Click on Settings at the bottom left of the main page, and at the bottom of the Settings page,
click on Network Settings. Find the Enable DHCP checkbox near the middle and uncheck it. When this is
done, the textboxes below the checkbox are no longer greyed out. In the IP Address box, enter the static IP
address you want to use. The Gateway, Subnet Mask, and Primary and Secondary DNS can be left
unchanged.
