Configuring a Static IP Address for Dermi Atlas Professional

Why a Static IP Address

Devices open Dermi Atlas Professional at the host computer's IP address. Most networks hand out addresses automatically (DHCP), so the address can change, for example after a router restart. When it changes:

• Bookmarks and installed apps on every device point to the old address and stop working until they are replaced.
• Devices that use HTTPS show a certificate warning. Atlas creates a new certificate that includes the new address the next time it starts from Dermi Atlas Manager, and that certificate has to be installed on every device again.

A static IP address avoids both. It is set either on the router (recommended) or on the host computer.

Reserving an Address on the Router

A DHCP reservation makes the router give the host computer the same address every time.

1. Find the host computer's MAC address:
   • Windows: run ipconfig /all in Command Prompt and note the Physical Address of the active connection.
   • macOS: open System Settings => Network, select the connection, then Details => Hardware.
   • Linux: run ip link and note the link/ether value of the active connection.
2. Sign in to the router: open its address in a browser, for example 192.168.1.1.
3. Open the DHCP settings: look for "DHCP Reservation", "Address Reservation", or "Static DHCP".
4. Add the reservation: enter the MAC address and the address to keep, for example 192.168.1.100.
5. Save, then restart the host computer so that it picks up the reserved address.

Setting the Address on the Host Computer

The address can also be set in the operating system. Use an address outside the router's automatic range.

Windows

1. Open Settings => Network & Internet and select the Ethernet or Wi-Fi connection.
2. Next to IP assignment, select Edit and choose Manual.
3. Turn on IPv4 and enter the IP address, subnet mask (usually 255.255.255.0), gateway (the router address), and DNS server.
4. Select Save.

macOS

1. Open System Settings => Network, select the connection, then Details => TCP/IP.
2. Set Configure IPv4 to Manually.
3. Enter the IP address, subnet mask, and router address.
4. Select OK.

Ubuntu (GNOME)

1. Open Settings => Network and select the gear icon next to the connection.
2. On the IPv4 tab, set the method to Manual.
3. Enter the address, netmask, and gateway.
4. Select Apply.

After the Address Changes

1. Open Dermi Atlas Manager on the host computer and select Restart on the Atlas Control card, so that Atlas starts on the new address and creates a certificate that includes it. Atlas starting again on its own after a computer restart does not create the certificate.
2. Check that the Atlas Access card shows the new address.
3. Update bookmarks and reinstall installed apps on each device from the new address.
4. For HTTPS, download the new certificate and install it on each device, as described in SSL Certificate Setup for HTTPS Access.