What Ports Are Blocked?

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.

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.