> ## Documentation index > Fetch the complete documentation index at: https://upstash.com/docs/llms.txt > Ask it with GET https://upstash.com/docs/ask?q=. Short keywords rank best. > Use these to discover all available pages before exploring further. > Feature requests: https://upstash.com/docs/common/help/feature-requests.md lists what users asked for and how to vote for a request or add one. > Page rating: `GET https://upstash.com/docs/feedback?path=/docs/redis/howto/ipallowlist&helpful=true` (or `false`) records whether this page helped. An optional `comment` (URL-encoded, at most 500 characters) says what was missing or wrong. It is anonymous and needs no key. Comments hold no code, secrets or personal data. # Use IP Allowlist IP Allowlist is available on all plans except for the free plan. IP Allowlist can be used to restrict which IP addresses are permitted to access your database by comparing a connection's address with predefined CIDR blocks. This feature enhances database security by allowing connections only from specified IP addresses. For example if you have dedicated production servers with static IP addresses, enabling IP allowlist blocks connections from other addresses. ![allowlist](/img/ipallowlist/ipallowlist.png) ## Enabling IP Allowlist By default, any IP address can be used to connect to your database. You must add at least one IP range to enable the allowlist. You can manage added IP ranges in the `Configuration` section on the database details page. You can either provide - IPv4 address, e.g. `37.237.15.43` - CIDR block, e.g. `181.49.172.0/24` Currently, IP Allowlist only supports IPv4 addresses. You can use more than one range to allow multiple clients. Meeting the criteria of just one is enough to establish a connection. It may take a few minutes for changes to propagate.