Python: Check if an IP matches or in a valid range

While implementing a certain feature, we wanted to restrict it's functionality to a range of IP's only available in the office.

To do that, you first need to download netaddr from github.

import netaddr

def cache_purge_allowed(request):
client_ip = request.META.get('HTTP_X_FORWARDED_FOR', request.META.get('REMOTE_ADDR', None))

if client_ip is None:
return False

ip = netaddr.IPAddress(client_ip)
return (ip in netaddr.IPNetwork('203.34.46.0/23')) or (ip in netaddr.IPNetwork('192.168.0.0/16')) or (ip in netaddr.IPNetwork('119.225.10.1'))

The example searches through 2 IP ranges and then compares to an exact IP match.

Sources

• https://github.com/drkjam/netaddr
• checking an IP range