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Outbound RDP connections don't work

Last updated on Aug 24, 2025

Onidel applies various default security settings, such as blocking outbound RDP (TCP port 3389) connections. This helps prevent malware-infected servers from being used in brute-force or DDoS attacks targeting other Windows systems on the internet.

If you have a legitimate need for outbound RDP traffic, you can easily disable the block:

  1. Go to your VM Management page

  2. Click the Security tab

  3. Locate the option "Block Outgoing RDP"

  4. Toggle the switch to disable the block

Once this setting is updated, your server will be able to initiate RDP connections to external systems.