> For the complete documentation index, see [llms.txt](https://docs.solanavibestation.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.solanavibestation.com/services/vps-hosting/restricted-ports.md).

# Restricted Ports

We reserve the right to add/remove ports to this list without warning as we come across new knowledge.

<table><thead><tr><th>Port</th><th>Direction</th><th>Service</th><th data-hidden>Description</th></tr></thead><tbody><tr><td>23</td><td>Both</td><td>Telnet</td><td>L</td></tr><tr><td>25</td><td>Out</td><td>SMTP</td><td></td></tr><tr><td>135, 137-139, 445</td><td>Both</td><td>MS SMB/Net-BIOS</td><td></td></tr><tr><td>19, 69, 123, 161-162, 1900, 11211</td><td>In</td><td>Commonly abused services for DDoS attacks</td><td></td></tr></tbody></table>