How an IP ban works
A website, CDN or web application firewall can compare each request’s source IP with deny rules before the application handles it. A rule may cover one IPv4 or IPv6 address, a subnet or a broader network range. Bans may expire after a set period or remain until the owner removes them.
There is no standard ban response. The server may return 403 Forbidden, show a custom block page or CAPTCHA, reset the connection or silently drop the request. A 429 Too Many Requests response usually indicates a current rate limit rather than a confirmed ban. When users share one public address through NAT, CGNAT or a shared proxy, one person’s traffic can affect everyone on that address.
Common triggers
- High request volume. Too many requests from one address can exceed the site’s limits.
- Disallowed automation. A crawler may ignore robots.txt, terms or endpoint restrictions.
- Security events. Repeated failed logins, spam or malicious requests can trigger a block.
- Poor IP reputation. The address may appear on an internal or external IP blacklist. The site may also correlate it with cookies, accounts or browser fingerprints tied to earlier unwanted traffic.
IP ban vs rate limiting
Rate limiting controls how often a client can make requests. An IP ban refuses traffic from the address or range.
| IP ban | Rate limit | |
|---|---|---|
| Target | IP address or network range | IP, account or API key |
| Typical signal | 403, block page or dropped connection | 429, often with Retry-After |
| End condition | Expiry or manual removal | Time window resets |
An account ban targets a user account regardless of its IP. Changing addresses won’t restore a banned account.
How to respond
- Inspect the response. Record the status, headers, body and time. A 403 alone doesn’t prove an IP ban.
- Pause retries. Repeated requests can extend a temporary restriction or create more blocked addresses.
- Correct the cause. Lower request rate and concurrency, honor
Retry-After, cache reusable responses and follow the site’s robots.txt and terms. - Request a review. Contact the site operator if authorized traffic was blocked by mistake. If you manage a proxy pool, remove the affected exit from use while checking its logs and reputation.
FAQ
How do I know if my IP is banned?
Look for consistent failures from one public IP while the site remains available elsewhere. A block page naming your IP is stronger evidence than a generic 403 or connection error.
How long does an IP ban last?
It depends on the site’s rules. Temporary bans may last minutes or days, while indefinite bans require the site owner to remove the address or range.
Can a proxy get around an IP ban?
A different exit IP may work if only the original address is blocked, but it doesn’t remove the ban. Don’t rotate around an intentional restriction; correct the traffic pattern and request access or review.