Effective Use of Proxies in Web Scraping: What You Need to Know

Internet servers have limited bandwidth and physically cannot handle an infinite number of requests per second, so website owners set limits on the frequency of requests from a single IP address. For automated data collection, these limits are naturally insufficient.

Why web scraping requires a well-planned network approach

Data collection requires thousands or tens of thousands of requests, and if all of them come from a single address, the site registers an anomaly. Security systems analyze request frequency, intervals between them, and even the order of resource loading. If they see something suspicious, they immediately block access. This is exactly why proxies are needed.

Why are proxies needed for web scraping at all

• Stable operation with a large number of requests. If you need, for example, 1000 requests per minute, you will need at least 100 addresses. Proxies provide exactly these addresses.
• Reducing the load on a single connection source. When requests are distributed across an address pool, each works in a gentle mode, which is the optimal way to avoid raising suspicion on the site.
• Increasing data collection stability. If one proxy stops working, the scraper switches to the next one, and the process does not stop.
• Scalability. A proxy pool allows you to increase capacity without stopping.

Key parameters for effective use of proxies

IP rotation

Rotation is the scheduled change of IP addresses. There are two types of rotation.

Rotating proxies change IP after each request or at a set interval. They minimize the risk of detection but may interrupt sessions.

Rotation is more effective for collecting public data, while static proxies are better for working with authenticated accounts.

Rotation frequency

If the site has strong protections, try to change IP after each request. If things are calm, changing once every 20–30 requests is sufficient. The optimal values, in any case, are selected individually.

Proxy geography

An IP address is tied to a specific region. For marketing research, price monitoring, and search result analysis, the proxy's geography must match the target audience's region. IP addresses from different countries allow you to collect data as local users see it.

Connection speed and stability

A proxy adds a link to the data transmission chain, so for correct operation it is important to monitor several indicators.

• Response time (ping) should not exceed 200-300 ms.
• Stability is measured by uptime — the percentage of time the proxy is available. The norm is 99% or higher.

Common mistakes when working with proxies

Using one proxy for all tasks

It is best to use one address for one task. You cannot run everything through a single proxy at once, otherwise the load accumulates, and a ban will come faster.

Lack of rotation

Even if the site does not ban you immediately, it accumulates statistics, and at some point you may get blocked.

Ignoring proxy quality

Free proxies are almost always either already banned or work so slowly that scraping becomes a chore.

Lack of monitoring and analytics

You do not know which proxies are working, which have failed, or which are close to being banned. As a result, problems are solved reactively, after the entire process has already stopped.

Scaling web scraping with proxies

Moving from small tasks to large projects requires a review of the proxy infrastructure.

• From 10 to 100 requests per minute. 5–10 high-quality proxies with manual rotation are sufficient. Suitable for price monitoring and collecting data from open catalogs.
• From 100 to 1000 requests per minute. A pool of 50–100 addresses and automatic rotation are needed. It is advisable to use residential proxies. Suitable for parsing marketplaces, social networks, and aggregators.
• More than 1000 requests per minute. A pool of 500 or more proxies, distributed architecture, multiple servers. Datacenter proxies for non-sensitive sites, residential proxies for more complex processes and tasks. Full automation of rotation and monitoring.

When scaling, it is important to monitor load distribution. You cannot load one proxy more than others, otherwise it will be the first to fail. It is better to keep a reserve of addresses 20–30% above the estimated need.

Conclusion

Belurk provides proxies for web scraping with different types of IPs and support for HTTP/HTTPS and SOCKS5 protocols. All addresses are checked for cleanliness before sale. Technical support helps select a pool for a specific task and configure the connection.

Data export is available in a ready-made format supported by most scrapers, so you can scale your scraping from small projects to industrial-level collection without changing providers or rebuilding your infrastructure.