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What Ports Are Blocked?

Published on: Mon, Sep 22, 2014 at 11:25 am EST
FAQ

We block several ports that are commonly abused for DDOS attacks:

  • TCP & UDP port 17
  • TCP & UDP port 19
  • TCP & UDP port 1900
  • UDP port 53413
  • UDP port 11211

These blocks are permanent, and cannot be removed.

The following ports may be blocked, depending on your account:

  • TCP port 25 (SMTP)
  • TCP & UDP port 137
  • TCP & UDP port 138
  • TCP & UDP port 139
  • TCP & UDP port 445

You may request these blocks be removed by opening a support ticket.

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