# Limitations

This page lists all current restrictions for our products.

***

## Blocking of specific websites

The following are unavailable through proxies:

* 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 block **does not apply** to crypto services and payment systems such as exchanges.

{% hint style="warning" %}
Applies to all products **except** [Mobile proxy](/eng/our-products/mobile-proxies.md).

Stripe and PayPal are available on Datacenter and ISP proxies.

Stripe is available on Premium Residential proxies.
{% endhint %}

***

## UDP on Residential proxies (US)

{% hint style="danger" %}
UDP does not work on [Residential proxies](/eng/our-products/residential-proxies.md) (**including Unlimited**) in the **US** location :flag\_us:
{% endhint %}

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

UDP works without issues in all other locations.

***

## p0f switching on Mobile proxies

Device fingerprint spoofing (p0f) is unavailable in some countries and 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 operators, p0f switching works normally.

***

## Closed ports

{% hint style="info" %}
Applies to all products. IMAP (993) is available on DC\ISP proxies.
{% endhint %}

Connections through proxies 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

* Basic connection limit = 5000. It can be increased; more details are available from [Support](/eng/contact-us.md).
* Maximum speed per order = 75 **MB/s**


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.proxyshard.com/eng/our-products/restrictions.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.