# Question about reserved addresses limit and public udp tunnelling

**URL:** <https://openziti.discourse.group/t/question-about-reserved-addresses-limit-and-public-udp-tunnelling/5366>\
**Category:** zrok\
**Created:** [November 24, 2025, 1:30pm UTC](https://openziti.discourse.group/t/question-about-reserved-addresses-limit-and-public-udp-tunnelling/5366 "2025-11-24T13:30:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![virgula](https://avatars.discourse-cdn.com/v4/letter/v/f08c70/32.png) [@virgula](https://openziti.discourse.group/u/virgula)\
**Post date:** [November 24, 2025, 1:30pm UTC](https://openziti.discourse.group/t/question-about-reserved-addresses-limit-and-public-udp-tunnelling/5366/1 "2025-11-24T13:30:10Z")

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Hello and thanks for your work on this amazing project.

I’d like to ask if there is a limit on creating zrok reserved addresses.  
Currently I’m sharing 2 services already:

`zrok reserve public 80 --unique-name "test"`  
`zrok reserve private 1234 --unique-name "test2" –-backend-mode tcpTunnel`

I’d like to share another one

`zrok reserve private --unique-name "test3" --backend-mode udpTunnel 0.0.0.0:7777`

But on this last one I’m getting:

`[ERROR]: unable to create share (unable to create share: [POST /share][401] shareUnauthorized)`

Already tried `disabling/enabling back` the environment, but still getting this problem so my question is if there is a limit on unique name shares.

I have also another question:

I tried to share via public mode an `udpTunnel` connection but it says:

`invalid sharing mode for a public share: udpTunnel`

Will public shares on udp be added in the future?

Thank you very much.

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**Author:** ![michael.quigley](https://yyz2.discourse-cdn.com/free1/user_avatar/openziti.discourse.group/michael.quigley/32/1123_2.png) [@michael.quigley](https://openziti.discourse.group/u/michael.quigley)\
**Post date:** [November 24, 2025, 3:47pm UTC](https://openziti.discourse.group/t/question-about-reserved-addresses-limit-and-public-udp-tunnelling/5366/2 "2025-11-24T15:47:35Z")

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Hello!

Yes, the free account on [zrok.io](http://zrok.io) only supports using 2 reserved shares. The $7/mo account gives you access to 10 reserved shares.

Public sharing for TCP and UDP is something we’ve discussed but is not on our near-term roadmap, so we don’t yet have any sort of projection when/if it might become available.

You _could_ acquire a very inexpensive Linux VPS somewhere and run your `zrok access private` on a public IP address, which would expose your private share to the internet. If your public Linux VPS had IP address 1.2.3.4, you could `zrok access private --bind 1.2.3.4:<port> <shareToken>` and then your private share would be exposed to the internet on `1.2.3.4:<port>`.