How APIs Can Block Suspicious Internet Guests Primarily based on IP Handle


We do not wish to permit signups from VPNs or proxies. Guests could possibly be utilizing a VPN to masks their actual location and bypass location restrictions. A customer utilizing TOR, which hides their actual location and identification, could be attempting to carry out malicious exercise in your website. So how can we block these customers?

Most IP lookup companies have some form of risk database. These companies permit us to examine whether or not an IP is nameless (utilizing a TOR, a VPN, or a proxy), or a risk, resembling a recognized spammer or hacker. We are able to use one among these companies to detect malicious customers and block them from signing up.

At ipdata, now we have a database of 600 million malicious IPs which is up to date each 15 minutes. Maxmind present a GeoIP2 Nameless IP Database which might detect nameless IPs, but it surely does not at the moment detect malicious IPs. AWS WAF has IP fame lists which can be utilized to dam nameless customers and IPs which have been flagged by Amazon’s inner risk intelligence.

Detecting threats with ipdata

The ipdata risk API can be utilized by making a easy GET request with the person’s IP deal with, resembling a look at. It responds with an object containing all the knowledge we have to decide in regards to the person. Are they a recognized attacker or abuser? They are a risk! Are they utilizing TOR or a proxy? They’re nameless.

There’s one other discipline in there too – is_bogon. This means that the IP has not been allotted or delegated by IANA or any RIRs, and is sort of actually from an attacker. Bogon IPs additionally embody reserved non-public addresses, resembling

Blocking signal ups

Now that we all know tips on how to detect VPNs, proxies, and threats, let’s really block these IPs from signing up utilizing a small Node.js software that includes the Specific.js. and Axios frameworks (each simply put in through NPM).

This is a simplified signup type in HTML, which ought to be saved to your internet set up (or different HTML supply listing) as signup.html.

Now, we will construct our Node software to serve the signup type and deal with new signups.

const categorical = require(“categorical”);
const app = categorical();
const axios = require(“axios”);

// Get an ipdata API Key from right here:
const IPDATA_API_KEY = “take a look at”;
const getIpData = async (ip) =>
const response = await axios.get(
return response.knowledge;

// Serve the signup web page
app.get(“/signup”, (req, res) =>
res.sendFile(“./signup.html”, root: __dirname )

// Deal with a signup request
app.put up(“/signup”, async (req, res) =>
const ip = req.connection.remoteAddress;
const ipdata = await getIpData(ip);
const is_threat, is_anonymous = ipdata;
if (is_threat)
if (is_anonymous)

// Success! create the person…

); attention(8000);

When a POST request is obtained by our server, we name the ipdata API to get further metadata for the person’s IP. Utilizing that, we block any IPs that are deemed to be a risk, together with nameless IPs.

When testing all of it collectively, it really works like this:


Do you actually need to?

Blocking nameless visitors to your website is more likely to catch out some real customers. There are various legitimate causes to make use of a VPN – some customers might have privateness considerations, or they may have restricted Web entry attributable to their authorities, ISP, or work. Blocking nameless visitors ought to be a final resort and is normally solely vital if there are some authorized restrictions, resembling media streaming rights or promoting. For these causes, nameless blocking will typically be mixed with blocking customers from sure international locations.

Blocking threats, nonetheless, is a transparent and simple technique to cut back fraudulent exercise in your web site. Do not simply block malicious IPs from signing up – cease them from accessing your website all collectively. Your actual customers should not discover in any respect, however the safety of their accounts will likely be strengthened.


Blocking customers from signing up utilizing a VPN or proxy is straightforward, and there are many choices. If you wish to cease all visitors from any VPN, contemplate blocking the requests utilizing a firewall, like AWS WAF. While blocking threats is a quick-win in your safety, blocking nameless visitors may influence reputable customers – doubtlessly leading to misplaced orders or pissed off customers – so use it with warning and solely the place wanted.



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