# JuliaBox: unable to connect to Julia

**URL:** <https://discourse.julialang.org/t/juliabox-unable-to-connect-to-julia/2053>\
**Category:** New to Julia\
**Tags:** juliabox\
**Created:** [February 12, 2017, 2:33am UTC](https://discourse.julialang.org/t/juliabox-unable-to-connect-to-julia/2053 "2017-02-12T02:33:33Z")\
**Posts on this page:** 14\
**Page:** 1

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**Author:** ![creative.user.name](https://avatars.discourse-cdn.com/v4/letter/c/e68b1a/32.png) [@creative.user.name](https://discourse.julialang.org/u/creative.user.name)\
**Post date:** [February 12, 2017, 2:33am UTC](https://discourse.julialang.org/t/juliabox-unable-to-connect-to-julia/2053/1 "2017-02-12T02:33:33Z")

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Hi,  
I’m trying to use JuliaBox, and I’m getting this error:

A connection to the notebook server could not be established. The notebook will continue trying to reconnect, but until it does, you will NOT be able to run code. Check your network connection or notebook server configuration.

Please do let me know if I’m missing something.

Thanks.

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**Author:** ![stevengj](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/stevengj/32/71_2.png) [@stevengj](https://discourse.julialang.org/u/stevengj)\
**Post date:** [February 12, 2017, 2:54am UTC](https://discourse.julialang.org/t/juliabox-unable-to-connect-to-julia/2053/2 "2017-02-12T02:54:43Z")

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Maybe a temporary network or server problem? [juliabox.com](http://juliabox.com) works for me right now.

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**Author:** ![creative.user.name](https://avatars.discourse-cdn.com/v4/letter/c/e68b1a/32.png) [@creative.user.name](https://discourse.julialang.org/u/creative.user.name)\
**Post date:** [February 12, 2017, 3:10am UTC](https://discourse.julialang.org/t/juliabox-unable-to-connect-to-julia/2053/3 "2017-02-12T03:10:11Z")

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Hey Steven,

It still says unable to connect to a kernel. I’ve tried all the choices of kernels (Julia 0.3 to 0.6 )- and yet it says Connection failed.

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**Author:** ![mbaz](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mbaz/32/17295_2.png) [@mbaz](https://discourse.julialang.org/u/mbaz)\
**Post date:** [February 12, 2017, 3:38am UTC](https://discourse.julialang.org/t/juliabox-unable-to-connect-to-julia/2053/4 "2017-02-12T03:38:07Z")

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Under “settings” there is a “network connectivity test” that may provide further information. BTW, I get the same error when I’m behind a firewall.

– mb

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**Author:** ![creative.user.name](https://avatars.discourse-cdn.com/v4/letter/c/e68b1a/32.png) [@creative.user.name](https://discourse.julialang.org/u/creative.user.name)\
**Post date:** [February 12, 2017, 3:51am UTC](https://discourse.julialang.org/t/juliabox-unable-to-connect-to-julia/2053/5 "2017-02-12T03:51:13Z")

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The network connectivity test says:

Testing secure websocket (port 443) connectivity…

```
connecting...

connected...

sent message...

received response. test successful

disconnected.

```

All tests passed.

I’ve disabled the Windows firewall, but no luck either.

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**Author:** ![dfdx](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/dfdx/32/120_2.png) [@dfdx](https://discourse.julialang.org/u/dfdx)\
**Post date:** [February 12, 2017, 1:43pm UTC](https://discourse.julialang.org/t/juliabox-unable-to-connect-to-julia/2053/6 "2017-02-12T13:43:51Z")

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You might want to try a different browser and/or network provider. If it still doesn’t work, you can always simply download Julia and run examples from notebooks right in the REPL.

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**Author:** ![tkelman](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/tkelman/32/692_2.png) [@tkelman](https://discourse.julialang.org/u/tkelman)\
**Post date:** [February 12, 2017, 2:35pm UTC](https://discourse.julialang.org/t/juliabox-unable-to-connect-to-julia/2053/7 "2017-02-12T14:35:17Z")

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Are you trying to use the Edge browser? I don’t think JuliaBox works correctly in Edge right now. That should ideally be reported and fixed if possible.

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**Author:** ![creative.user.name](https://avatars.discourse-cdn.com/v4/letter/c/e68b1a/32.png) [@creative.user.name](https://discourse.julialang.org/u/creative.user.name)\
**Post date:** [February 12, 2017, 3:59pm UTC](https://discourse.julialang.org/t/juliabox-unable-to-connect-to-julia/2053/8 "2017-02-12T15:59:20Z")

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I’m using Firefox and Chrome - both have the same error.  
Maybe its an antivirus thing - not sure.  
Yeah, I already have Julia installed, just wanted to use this to show JuliaBox in a classroom setting.  
I’ll show them the downloaded version I guess.

Thanks anyway!

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**Author:** ![j.l.anonymous](https://avatars.discourse-cdn.com/v4/letter/j/8c91f0/32.png) [@j.l.anonymous](https://discourse.julialang.org/u/j.l.anonymous)\
**Post date:** [April 16, 2017, 8:55pm UTC](https://discourse.julialang.org/t/juliabox-unable-to-connect-to-julia/2053/9 "2017-04-16T20:55:29Z")

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@creative.user.name This is an old post, but I have the same issue. Checking in to see whether you ended up finding a solution to this…

Thanks,  
J.L

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**Author:** ![creative.user.name](https://avatars.discourse-cdn.com/v4/letter/c/e68b1a/32.png) [@creative.user.name](https://discourse.julialang.org/u/creative.user.name)\
**Post date:** [April 16, 2017, 10:33pm UTC](https://discourse.julialang.org/t/juliabox-unable-to-connect-to-julia/2053/10 "2017-04-16T22:33:50Z")

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No, I couldn’t find a solution. I used the local version of Julia.

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**Author:** ![anon61610682](https://avatars.discourse-cdn.com/v4/letter/a/ad7895/32.png) [@anon61610682](https://discourse.julialang.org/u/anon61610682)\
**Post date:** [May 27, 2017, 12:04pm UTC](https://discourse.julialang.org/t/juliabox-unable-to-connect-to-julia/2053/11 "2017-05-27T12:04:05Z")

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Are you using any kind of adblockers? If so, please relax your settings and/or turn off filtering for [juliabox.com](http://juliabox.com).

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**Author:** ![alirezamecheng](https://avatars.discourse-cdn.com/v4/letter/a/e95f7d/32.png) [@alirezamecheng](https://discourse.julialang.org/u/alirezamecheng)\
**Post date:** [August 2, 2017, 1:59pm UTC](https://discourse.julialang.org/t/juliabox-unable-to-connect-to-julia/2053/12 "2017-08-02T13:59:32Z")

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When I get this error I simply start another julia box without closing the old ones.  
It works and I can save my works etc…  
Give that a try maybe it works.

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**Author:** ![yingyot\_infahsaeng](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/yingyot_infahsaeng/32/2157_2.png) [@yingyot\_infahsaeng](https://discourse.julialang.org/u/yingyot_infahsaeng)\
**Post date:** [October 11, 2017, 5:05am UTC](https://discourse.julialang.org/t/juliabox-unable-to-connect-to-julia/2053/13 "2017-10-11T05:05:55Z")

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Hi, I have the same problem. I got a message  
“A connection to the notebook server could not be established. The notebook will continue trying to reconnect. Check your network connection or notebook server configuration”

I used window 10 64 bit, Chrome, also I have bitdefender antivirus.

Any solutions or suggestions?

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**Author:** ![Paul\_Soderlind](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/paul_soderlind/32/1753_2.png) [@Paul\_Soderlind](https://discourse.julialang.org/u/Paul_Soderlind)\
**Post date:** [October 11, 2017, 11:39am UTC](https://discourse.julialang.org/t/juliabox-unable-to-connect-to-julia/2053/14 "2017-10-11T11:39:33Z")

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It’s probably Bitdefender’s fault. I had the same problem (a few months back), replaced Bitdefender with something else - and JuliaBox started to work. Alternatively, you could try to tweak the firewall settings. (No, I don’t know how.)

/Paul S