I figured out what the problem was. I didn’t realize that at the bottom of my settings.py file ALLOWED_HOSTS was being overwritten when the IP addresses are looked up at runtime. Sooo, ALLOWED_HOSTS appears near the beginning of the file which contains the list of your supplied ip addresses and/or domain names and another one at the very end of the file which is set as follows:

Find out what the IP addresses are at run time

This is necessary because otherwise Gunicorn will reject the connections

def ipaddresses():
iplist = []
for interface in netifaces.interfaces():
addrs = netifaces.ifaddresses(interface)
for x in (netifaces.AF_INET, netifaces.AFINET6):
if x in addrs:
iplist.append(addrs[x][0][‘addr’])
return ip_list

Discover our IP address

ALLOWED_HOSTS = ip_addresses()

I had to change ALLOWED_HOSTS = ip_addresses() to ALLOWED_HOSTS += ip_addresses() so that my entries near the beginning of the file weren’t overwritten.