If your proxy connection starts dropping or getting rejected — it's most likely related to the connection limit. Nothing to worry about, here's where it comes from and how to fix it quickly.
Why this happens
To keep the network fast and stable for all customers, we limit the number of concurrent connections (threads) to a single IP — this is part of the Fair Usage Policy for ISP and IPv4 proxy types.
Rest assured: the vast majority of customers never run into this. The limit only kicks in under abnormally high load on an individual IP — so if you're reading this, your script or software is most likely opening more connections than usual.
How the limit works
Each IP has 100 concurrent connections available by default. This is counted separately per address — so if the limit is exceeded on one IP, it has no effect on your other proxies, which keep working as normal.
Once the limit is exceeded, new connections beyond it are temporarily rejected. This isn't a block or an outage — the limit lifts automatically as soon as the load returns to normal.
What you can do
Usually a small adjustment to your load is enough:
limit the number of threads/workers in your script to 90-95, leaving a small buffer below the limit;
use connection pooling / keep-alive instead of opening a new connection for every request;
if the load is consistently high, distribute requests across multiple IPs (e.g. round-robin); you can also purchase additional proxies if needed.
You might be tempted to replace the proxy, but a new IP would simply meet the same limit under the same load — so easing the load is the more reliable path.
If the limit persists even after reducing the load
This can sometimes happen if your credentials became known to a third party and someone else is using the proxy alongside you. In this case, changing your proxy login and password will help — you can do this yourself in your personal account.
If the issue still persists — reach out to us in chat, we'll sort it out together.
Legal basis
Full terms are available in clause 4.9 of our Public Offer.