# cannot connect to the server at 192.168.178.21:2100.
**URL:** https://community.umbrel.com/t/cannot-connect-to-the-server-at-192-168-178-21-2100/15745
**Category:** Support and Troubleshooting
**Created:** [March 22, 2024, 12:06am UTC](https://community.umbrel.com/t/cannot-connect-to-the-server-at-192-168-178-21-2100/15745 "2024-03-22T00:06:34Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@Bingo](https://community.umbrel.com/u/Bingo)
#### Post date: [March 22, 2024, 12:06am UTC](https://community.umbrel.com/t/cannot-connect-to-the-server-at-192-168-178-21-2100/15745/1 "2024-03-22T00:06:35Z")
Hello, I come from Germany and have the following problem. I have updated to OS 1.0. I completely reinstalled the software and used a formatted SSD. Umbrel is running very well so far except for the following problem. When I start the installed Bitcoin Node app, a new browser page opens as usual but I get the following error message: “Error: Connection failed Firefox cannot connect to the server at 192.168.178.21:2100.” Does anyone have any tips on what I could do? I have already started the router and all other devices several times. Thanks
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### Author:  [@smolgrrr](https://community.umbrel.com/u/smolgrrr)
#### Post date: [March 22, 2024, 5:18am UTC](https://community.umbrel.com/t/cannot-connect-to-the-server-at-192-168-178-21-2100/15745/2 "2024-03-22T05:18:17Z")
Hi @Bingo Sorry to hear about your issue here, can you please navigate to the settings dashboard on umbrel.local, select START under troubleshooting and share the resultant logs here.
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### Author:  [@Bingo](https://community.umbrel.com/u/Bingo)
#### Post date: [March 22, 2024, 7:28am UTC](https://community.umbrel.com/t/cannot-connect-to-the-server-at-192-168-178-21-2100/15745/3 "2024-03-22T07:28:29Z")
Unfortunately I cannot upload the log file. “Sorry, new users can’t upload attachments.”
Copy&Paste as text is also not completely possible. “An error occurred: Body is limited to 32000 characters; you entered 139041.”
> **[umbrel\_umbrel\_2024-03-22\_08-20.log](https://drive.google.com/file/d/1UFIznKODatXhJDQCGUPC6Unqg4-3oA_S/view?usp=sharing)**
>
> Google Drive file.
> **[umbrel\_system\_2024-03-22\_08-30.log](https://drive.google.com/file/d/1LKOmca8HA5z2dHjANR0nQr84e6XKKC-Q/view?usp=sharing)**
>
> Google Drive file.
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### Author:  [@Achim](https://community.umbrel.com/u/Achim)
#### Post date: [March 22, 2024, 3:39pm UTC](https://community.umbrel.com/t/cannot-connect-to-the-server-at-192-168-178-21-2100/15745/4 "2024-03-22T15:39:53Z")
@smolgrrr That seems to be a similar problem that I have with the Jam App which does not open because the browser is not able to connect to 192.168.0.XXX:5002 (or umbrel.local:5002)
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### Author:  [@Redin](https://community.umbrel.com/u/Redin)
#### Post date: [March 23, 2024, 10:55pm UTC](https://community.umbrel.com/t/cannot-connect-to-the-server-at-192-168-178-21-2100/15745/5 "2024-03-23T22:55:34Z")
As you have traveled to another location, your ip has changed and you will have to check. Otherwise try accessing your node via umbrel.local
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### Author:  [@caymanmclaren1](https://community.umbrel.com/u/caymanmclaren1)
#### Post date: [April 25, 2025, 11:34pm UTC](https://community.umbrel.com/t/cannot-connect-to-the-server-at-192-168-178-21-2100/15745/6 "2025-04-25T23:34:12Z")
Seems to be a common issue with no solid solutions.
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### Author:  [@caymanmclaren1](https://community.umbrel.com/u/caymanmclaren1)
#### Post date: [April 26, 2025, 11:50pm UTC](https://community.umbrel.com/t/cannot-connect-to-the-server-at-192-168-178-21-2100/15745/7 "2025-04-26T23:50:09Z")
Factory reset fixed this issue…