> ## Documentation Index
> Fetch the complete documentation index at: https://docs.packets-decreaser.net/llms.txt
> Use this file to discover all available pages before exploring further.

# KVM vServer

> kl

## Default network restrictions

To protect the platform from spam and abuse, we blocks several outbound SMTP source ports on all KVM vServer plans by default.

<Warning>
  Attempting to send email through these ports will fail until you request access. If your application depends on email delivery, make sure to request the ports you need before going live.
</Warning>

The following source ports are blocked by default on all KVM vServer instances:

| Port | Protocol | Service           |
| ---- | -------- | ----------------- |
| 25   | TCP      | SMTP              |
| 465  | TCP      | SMTP (SSL)        |
| 587  | TCP      | SMTP (submission) |
| 2525 | TCP      | SMTP (alternate)  |

## Requesting port access

You can request any of the blocked SMTP ports to be unlocked on your account.

<Steps>
  <Step title="Open a support ticket">
    Log in to the Packets Decreaser client area and open a new support ticket. Specify which port or ports you need unblocked and provide a brief description of your intended use case (for example, sending transactional email through a third-party SMTP relay).
  </Step>

  <Step title="Wait for review">
    The support team will review your request. Port unlock requests are typically processed within one business day.
  </Step>

  <Step title="Confirm access">
    Once approved, test your connection to confirm the port is reachable from your vServer.
  </Step>
</Steps>

<Note>
  Port unlock requests are evaluated on a case-by-case basis. Providing clear context about your use case speeds up the review process.
</Note>