> For the complete documentation index, see [llms.txt](https://docs.4dsky.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.4dsky.com/most-common-issues/what-ports-does-the-red-box-use.md).

# What ports does the red box use?

*  TCP: 80, 443, 1337 for the UI and admin things, don't let outside users on them. 
* UDP: 1352, 30066 - that's where streams are served from. You normaly do not need to open  or forward these ports explicitly but should not block them. 
* There is a case where a data buyer is on a restricted newtork (symmetric NAT)  which you will not be able to serve if he's on a restricted network too.  

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[Advanced Security](/setup-instructions/advanced-security.md)
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