# Limitations

This page lists all active restrictions on our products.

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## Blocking individual websites

Not available through the proxy:

* Banking websites (online banking, bank personal accounts)
* Government portals and websites
* Payment processors: <mark style="color:purple;">Stripe</mark>, <mark style="color:purple;">PayPal</mark>

This is a regulatory requirement aimed at limiting fraudulent activity. The blocking **does not apply** to crypto services and payment systems such as exchanges.

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Applies to all products, **except** [Mobile proxy](https://docs.proxyshard.com/eng/our-products/mobile-proxies).
{% endhint %}

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## UDP on residential proxies (US)

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UDP does not work on [Residential proxies](https://docs.proxyshard.com/eng/our-products/residential-proxies) in the location **US** :flag\_us:
{% endhint %}

This is not our restriction. At the beginning of 2026, providers in the US banned incoming UDP connections without prior initiation from inside the network. Because of this, UDP Associate on proxies stopped working in this region.

In all other locations, UDP works without issues.

***

## Changing p0f on mobile proxies

Device fingerprint spoofing (p0f) is unavailable in some countries and with some operators:

| Country                   | Operator      |
| ------------------------- | ------------- |
| Germany :flag\_de:        | All operators |
| France :flag\_fr:         | All operators |
| Indonesia :flag\_id:      | All operators |
| Poland :flag\_pl:         | Orange        |
| Ukraine :flag\_ua:        | Lifecell      |
| United Kingdom :flag\_gb: | All operators |

In all other locations and with all other operators, p0f spoofing works as usual.

***

## Closed ports

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Applies to all products.
{% endhint %}

Through the proxy, connections to service ports that are often used for attacks on third-party services are blocked:

| Port | Protocol |
| ---- | -------- |
| 21   | FTP      |
| 22   | SSH      |
| 23   | Telnet   |
| 25   | SMTP     |
| ...  | ...      |

***

## Restrictions on Unlimited residential proxies

* The basic connection limit = 5000. It can be increased; we can explain in more detail in [Support](https://docs.proxyshard.com/eng/contact-us)
* Maximum speed per order = 75 **MB/s**