# Is TCP port 1883 "reserved" on iHost?

**URL:** <https://forum.ewelink.cc/t/is-tcp-port-1883-reserved-on-ihost/29715>\
**Category:** eWeLink CUBE\
**Tags:** ihost\
**Created:** [March 20, 2024, 10:36am UTC](https://forum.ewelink.cc/t/is-tcp-port-1883-reserved-on-ihost/29715 "2024-03-20T10:36:23Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![cubilon](https://avatars.discourse-cdn.com/v4/letter/c/13edae/32.png) [@cubilon](https://forum.ewelink.cc/u/cubilon)\
**Post date:** [March 20, 2024, 10:36am UTC](https://forum.ewelink.cc/t/is-tcp-port-1883-reserved-on-ihost/29715/1 "2024-03-20T10:36:23Z")

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Hi,  
just trying to execute mosquitto container with Docker@iHost, but port 1883 seems to be not assignable. Checked: it seems not open, but the container starts only using different ports.

Someone can confirm 1883 TCP port can’t be used on iHost? Is it reserved?

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**Author:** ![Alexie](https://dub1.discourse-cdn.com/flex005/user_avatar/forum.ewelink.cc/alexie/32/1593_2.png) [@Alexie](https://forum.ewelink.cc/u/Alexie)\
**Post date:** [March 20, 2024, 12:44pm UTC](https://forum.ewelink.cc/t/is-tcp-port-1883-reserved-on-ihost/29715/2 "2024-03-20T12:44:48Z")

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> [@【Add-on Guide】MQTT2CUBE-Tasmota: sync your Tasmota devices to CUBE](https://forum.ewelink.cc/t/add-on-guide-mqtt2cube-tasmota-sync-your-tasmota-devices-to-cube/19413):
>
> MQTT2CUBE-Tasmota add-on allows you to sync your Tasmota devices to iHost (CUBE) for control. Make sure you’ve updated your iHost (CUBE) to V1.8 If you have a working MQTT broker and you want to keep using it, skip to step 6 If you want to run a MQTT broker in iHost and connect your Tasmota device, follow the step 1-6 Step 1 Create a volume, name it like mosquittoConfig Step 2 Run the Filebrowser add-on, select the volume created in step1 Step 3 Open the page of fileb…

this post show you how to install and config mosquitto

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<div class="post-metadata">

**Author:** ![cubilon](https://avatars.discourse-cdn.com/v4/letter/c/13edae/32.png) [@cubilon](https://forum.ewelink.cc/u/cubilon)\
**Post date:** [March 20, 2024, 1:07pm UTC](https://forum.ewelink.cc/t/is-tcp-port-1883-reserved-on-ihost/29715/3 "2024-03-20T13:07:46Z")

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this is not the answer I was searching for 🙂 I know how to solve: changing tcp port. The point is another one.

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**Author:** ![SuiKa](https://dub1.discourse-cdn.com/flex005/user_avatar/forum.ewelink.cc/suika/32/8656_2.png) [@SuiKa](https://forum.ewelink.cc/u/SuiKa)\
**Post date:** [March 21, 2024, 7:11am UTC](https://forum.ewelink.cc/t/is-tcp-port-1883-reserved-on-ihost/29715/4 "2024-03-21T07:11:04Z")

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The 1883 port of iHost is reserved.  
It’s not recommended to use it.

If you are trying to run a mosquitto container.  
Try run it with bridge network mode and map the 1883 port of container to a custom port.

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<div class="post-metadata">

**Author:** ![cubilon](https://avatars.discourse-cdn.com/v4/letter/c/13edae/32.png) [@cubilon](https://forum.ewelink.cc/u/cubilon)\
**Post date:** [March 21, 2024, 7:28am UTC](https://forum.ewelink.cc/t/is-tcp-port-1883-reserved-on-ihost/29715/5 "2024-03-21T07:28:11Z")

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ok, this is the answer I was searching for: 1883 can’t be used.  
Thanks