#  Why can't I use julia addprocs?(ECONNREFUSED)

**URL:** <https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477>\
**Category:** Julia at Scale\
**Created:** [December 2, 2021, 5:15pm UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477 "2021-12-02T17:15:36Z")\
**Posts on this page:** 20\
**Page:** 1

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**Author:** ![GalloLuigi](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/galloluigi/32/31349_2.png) [@GalloLuigi](https://discourse.julialang.org/u/GalloLuigi)\
**Post date:** [December 2, 2021, 5:15pm UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/1 "2021-12-02T17:15:36Z")

</div>

I’m writing a program that should connect to remote virtual machines and then do distributed execution.

I have this warning: “Warning: Identity file /home/luigal/.ssh/id\_rsa not accessible: No such file or directory.”.(Even if the file exists and the path is correct)

The program crashes when I try to do :

worker=[(“myuser@ip:port”,1)]

addprocs(worker;sshflags=“-i /home/luigal/.ssh/id\_rsa”,exename=“/usr/local/bin/julia”, tunnel=true,dir=“/home/luigal/HGEpidemics-main/”)

This is the project I am working on: [GitHub - GalloLuigi/HGEpidemics: Ottimizzazione di HGEpidemics.jl, un framework che consente di effettuare simulazioni di diffusione epidemica basate ad agenti.](https://github.com/GalloLuigi/HGEpidemics-main)

I need to do this work on: [https://github.com/GalloLuigi/HGEpidemics-main/blob/main/src/experiments/spreading/spreading\_experiment\_d.jl](https://github.com/GalloLuigi/HGEpidemics-main/blob/main/src/experiments/spreading/spreading_experiment_d.jl)

> <https://github.com/GalloLuigi/HGEpidemics/blob/main/src/experiments/spreading_parallel/spreading_experiment_d.jl>

Someone can help me?

The console says:

 ![](https://global.discourse-cdn.com/julialang/original/3X/6/4/6481610b03410ff8a52f323075b8fa026a8d455d.png)  
 ![](https://global.discourse-cdn.com/julialang/original/3X/f/b/fbef4b3c7ed9e70ac31213755c956fba2bfa4587.png)

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<div class="post-metadata">

**Author:** ![lawless-m](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/lawless-m/32/30869_2.png) [@lawless-m](https://discourse.julialang.org/u/lawless-m)\
**Post date:** [December 3, 2021, 1:04pm UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/2 "2021-12-03T13:04:57Z")

</div>

It looks like you are running

`addprocs(worker;sshflags="-i /home/luigal/.ssh/id_rsa",exename="/usr/local/bin/julia", tunnel=true,dir="/home/luigal/HGEpidemics-main/")`

On a Windows machine, and that machine cannot access “/home/luigal/.ssh/id\_rsa” which is on the machine _you are trying to log into_

it should be something like `C:\\Users\\Tesi\\.ssh\\id_rsa` pointing to wherever it is on the Windows machine

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<div class="post-metadata">

**Author:** ![GalloLuigi](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/galloluigi/32/31349_2.png) [@GalloLuigi](https://discourse.julialang.org/u/GalloLuigi)\
**Post date:** [December 3, 2021, 3:27pm UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/3 "2021-12-03T15:27:47Z")

</div>

Hi, thanks for the clarification.

I have this message: “load pubkey “C:\Users\luigi/.ssh/id\_rsa”: invalid format”.

I have my local machine (Windows) and some remote virtual machines (Linux).  
Should I create the shh keys on the remote machines and then move them to the window machine( as sshflags input) ?

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<div class="post-metadata">

**Author:** ![lawless-m](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/lawless-m/32/30869_2.png) [@lawless-m](https://discourse.julialang.org/u/lawless-m)\
**Post date:** [December 3, 2021, 3:29pm UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/4 "2021-12-03T15:29:59Z")

</div>

in that case try C:\Users\luigi\.ssh\id\_rsa.pub

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<div class="post-metadata">

**Author:** ![lawless-m](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/lawless-m/32/30869_2.png) [@lawless-m](https://discourse.julialang.org/u/lawless-m)\
**Post date:** [December 3, 2021, 3:31pm UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/5 "2021-12-03T15:31:31Z")

</div>

it matters not where you generate the keys, just so long as they are distributed

You’ll need id\_rsa.pub to be included in /home/luigal/.ssh/authorized\_keys

try to get it working in a standalone ssh client

ssh -i C:\Users\luigi.ssh\id\_rsa.pub REMOTE\_HOST

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<div class="post-metadata">

**Author:** ![GalloLuigi](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/galloluigi/32/31349_2.png) [@GalloLuigi](https://discourse.julialang.org/u/GalloLuigi)\
**Post date:** [December 3, 2021, 4:33pm UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/6 "2021-12-03T16:33:39Z")

</div>

I downloaded id\_rsa and id\_rsa.pub from virtual machines and put them in "C:\Users\luigi.ssh".  
I have create a folder /home/luigal/.ssh/authorized\_keys and then i copied id\_rsa.pub into it.

Finally I tried to connect with ssh but this is the result:

 ![pscambiochiavi](https://global.discourse-cdn.com/julialang/original/3X/b/5/b5ac97522085445152dc0d2d50bdccad06c9f0ce.png)

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<div class="post-metadata">

**Author:** ![lawless-m](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/lawless-m/32/30869_2.png) [@lawless-m](https://discourse.julialang.org/u/lawless-m)\
**Post date:** [December 4, 2021, 9:15am UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/7 "2021-12-04T09:15:52Z")

</div>

[https://unix.stackexchange.com/questions/340844/how-to-enable-diffie-hellman-group1-sha1-key-exchange-on-debian-8-0](https://unix.stackexchange.com/questions/340844/how-to-enable-diffie-hellman-group1-sha1-key-exchange-on-debian-8-0)

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<div class="post-metadata">

**Author:** ![GalloLuigi](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/galloluigi/32/31349_2.png) [@GalloLuigi](https://discourse.julialang.org/u/GalloLuigi)\
**Post date:** [December 4, 2021, 10:47am UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/8 "2021-12-04T10:47:43Z")

</div>

I definitely think it’s a key format problem.  
I named id\_rsa/id\_rsa.pub the pair of keys generated by windows (local machine)and id\_rsa\_l/id\_rsa\_l.pub the pair of keys generated by linux(remote machine).

When i try to use ssh on the terminal this happens:

 ![nuovalog - Copia](https://global.discourse-cdn.com/julialang/original/3X/4/a/4ae2f00d566b7fcfa296034404924cb5b99fb8e0.png)

The same format error happens when I use Julia code:

Warning: Identity file C:\Users\luigi.ssh\id\_rsa.pub not accessible: No such file or directory.  
load pubkey “C:\Users\luigi/.ssh/id\_rsa”: invalid format

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<div class="post-metadata">

**Author:** ![lawless-m](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/lawless-m/32/30869_2.png) [@lawless-m](https://discourse.julialang.org/u/lawless-m)\
**Post date:** [December 4, 2021, 12:12pm UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/9 "2021-12-04T12:12:01Z")

</div>

Oh, I thought you had got over that. I gave you bad advice yesterday

it should be ssh -i c:\users\luigi.ssh\id\_rsa (without the .pub)

In fact, you can probably skip all the options and just go with

ssh 193… or ssh luigal@193… - hiding the domain name wasn’t so successful 🙂

and in addprocs

addprocs(worker; exename=“/usr/local/bin/julia”, tunnel=true,dir=“/home/luigal/HGEpidemics-main/”)

---

<div class="post-metadata">

**Author:** ![GalloLuigi](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/galloluigi/32/31349_2.png) [@GalloLuigi](https://discourse.julialang.org/u/GalloLuigi)\
**Post date:** [December 4, 2021, 6:01pm UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/10 "2021-12-04T18:01:01Z")

</div>

The program now does not give me any errors on the key but still the “ECONNREFUSED” error.

The ssh connection gives me this:

![newerror](https://global.discourse-cdn.com/julialang/original/3X/d/9/d9c246c089fc1ccb56d7f83835617db2baf56434.png)

(The credentials are correct)

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<div class="post-metadata">

**Author:** ![lawless-m](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/lawless-m/32/30869_2.png) [@lawless-m](https://discourse.julialang.org/u/lawless-m)\
**Post date:** [December 4, 2021, 8:13pm UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/12 "2021-12-04T20:13:24Z")

</div>

You can output diagnostic messages in ssh by adding -v -vv & -vvv

ssh -vvv -oKex…(all the other stuff)

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<div class="post-metadata">

**Author:** ![GalloLuigi](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/galloluigi/32/31349_2.png) [@GalloLuigi](https://discourse.julialang.org/u/GalloLuigi)\
**Post date:** [December 5, 2021, 9:17am UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/13 "2021-12-05T09:17:37Z")

</div>

Here is the result:

C:\Users\luigi\>ssh -vvv -oKexAlgorithms=+diffie-hellman-group1-sha1 193.205.161.5

OpenSSH\_for\_Windows\_8.1p1, LibreSSL 3.0.2

debug1: Reading configuration data C:\Users\luigi/.ssh/config

debug3: Failed to open file:C:/ProgramData/ssh/ssh\_config error:2

debug2: resolve\_canonicalize: hostname 193.205.161.5 is address

debug2: ssh\_connect\_direct

debug1: Connecting to 193.205.161.5 [193.205.161.5] port 22.

debug1: Connection established.

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_rsa error:2

debug1: identity file C:\Users\luigi/.ssh/id\_rsa type 0

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_rsa-cert error:2

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_rsa-cert.pub error:2

debug1: identity file C:\Users\luigi/.ssh/id\_rsa-cert type -1

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_dsa error:2

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_dsa.pub error:2

debug1: identity file C:\Users\luigi/.ssh/id\_dsa type -1

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_dsa-cert error:2

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_dsa-cert.pub error:2

debug1: identity file C:\Users\luigi/.ssh/id\_dsa-cert type -1

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_ecdsa error:2

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_ecdsa.pub error:2

debug1: identity file C:\Users\luigi/.ssh/id\_ecdsa type -1

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_ecdsa-cert error:2

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_ecdsa-cert.pub error:2

debug1: identity file C:\Users\luigi/.ssh/id\_ecdsa-cert type -1

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_ed25519 error:2

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_ed25519.pub error:2

debug1: identity file C:\Users\luigi/.ssh/id\_ed25519 type -1

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_ed25519-cert error:2

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_ed25519-cert.pub error:2

debug1: identity file C:\Users\luigi/.ssh/id\_ed25519-cert type -1

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_xmss error:2

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_xmss.pub error:2

debug1: identity file C:\Users\luigi/.ssh/id\_xmss type -1

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_xmss-cert error:2

debug3: Failed to open file:C:/Users/luigi/.ssh/id\_xmss-cert.pub error:2

debug1: identity file C:\Users\luigi/.ssh/id\_xmss-cert type -1

debug1: Local version string SSH-2.0-OpenSSH\_for\_Windows\_8.1

debug1: Remote protocol version 2.0, remote software version dropbear\_0.52

debug1: no match: dropbear\_0.52

debug2: fd 3 setting O\_NONBLOCK

debug1: Authenticating to 193.205.161.5:22 as ‘luigi’

debug3: hostkeys\_foreach: reading file “C:\Users\luigi/.ssh/known\_hosts”

debug3: record\_hostkey: found key type RSA in file C:\Users\luigi/.ssh/known\_hosts:4

debug3: load\_hostkeys: loaded 1 keys from 193.205.161.5

debug3: Failed to open file:C:/Users/luigi/.ssh/known\_hosts2 error:2

debug3: Failed to open file:C:/ProgramData/ssh/ssh\_known\_hosts error:2

debug3: Failed to open file:C:/ProgramData/ssh/ssh\_known\_hosts2 error:2

debug3: order\_hostkeyalgs: prefer hostkeyalgs: rsa-sha2-512-cert-v01 @openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,rsa-sha2-512,rsa-sha2-256,ssh-rsa

debug3: send packet: type 20

debug1: SSH2\_MSG\_KEXINIT sent

debug3: receive packet: type 20

debug1: SSH2\_MSG\_KEXINIT received

debug2: local client KEXINIT proposal

debug2: KEX algorithms: curve25519-sha256,curve25519-sha256 @libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1,ext-info-c

debug2: host key algorithms: rsa-sha2-512-cert-v01 @openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519

debug2: ciphers ctos: chacha20-poly1305 @openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com

debug2: ciphers stoc: chacha20-poly1305 @openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com

debug2: MACs ctos: umac-64-etm @openssh.com,umac-128-etm @openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1

debug2: MACs stoc: umac-64-etm @openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1

debug2: compression ctos: none,zlib @openssh.com,zlib

debug2: compression stoc: none,zlib @openssh.com,zlib

debug2: languages ctos:

debug2: languages stoc:

debug2: first\_kex\_follows 0

debug2: reserved 0

debug2: peer server KEXINIT proposal

debug2: KEX algorithms: diffie-hellman-group1-sha1

debug2: host key algorithms: ssh-rsa,ssh-dss

debug2: ciphers ctos: aes128-ctr,3des-ctr,aes256-ctr,aes128-cbc,3des-cbc,aes256-cbc,twofish256-cbc,twofish-cbc,twofish128-cbc,blowfish-cbc

debug2: ciphers stoc: aes128-ctr,3des-ctr,aes256-ctr,aes128-cbc,3des-cbc,aes256-cbc,twofish256-cbc,twofish-cbc,twofish128-cbc,blowfish-cbc

debug2: MACs ctos: hmac-sha1-96,hmac-sha1,hmac-md5

debug2: MACs stoc: hmac-sha1-96,hmac-sha1,hmac-md5

debug2: compression ctos: zlib,zlib @ openssh .com,none

debug2: compression stoc: zlib,zlib @openssh.com,none

debug2: languages ctos:

debug2: languages stoc:

debug2: first\_kex\_follows 0

debug2: reserved 0

debug1: kex: algorithm: diffie-hellman-group1-sha1

debug1: kex: host key algorithm: ssh-rsa

debug1: kex: server-\>client cipher: aes128-ctr MAC: hmac-sha1 compression: none

debug1: kex: client-\>server cipher: aes128-ctr MAC: hmac-sha1 compression: none

debug2: bits set: 530/1024

debug3: send packet: type 30

debug1: expecting SSH2\_MSG\_KEX\_ECDH\_REPLY

debug3: receive packet: type 31

debug1: Server host key: ssh-rsa SHA256:y1/7G8kP+ao4JsOQuIPNOMJk2TEWk+Q/RpGgZwPzG88

debug3: hostkeys\_foreach: reading file “C:\Users\luigi/.ssh/known\_hosts”

debug3: record\_hostkey: found key type RSA in file C:\Users\luigi/.ssh/known\_hosts:4

debug3: load\_hostkeys: loaded 1 keys from 193.205.161.5

debug3: Failed to open file:C:/Users/luigi/.ssh/known\_hosts2 error:2

debug3: Failed to open file:C:/ProgramData/ssh/ssh\_known\_hosts error:2

debug3: Failed to open file:C:/ProgramData/ssh/ssh\_known\_hosts2 error:2

debug1: Host ‘193.205.161.5’ is known and matches the RSA host key.

debug1: Found key in C:\Users\luigi/.ssh/known\_hosts:4

debug2: bits set: 516/1024

debug3: send packet: type 21

debug2: set\_newkeys: mode 1

debug1: rekey out after 4294967296 blocks

debug1: SSH2\_MSG\_NEWKEYS sent

debug1: expecting SSH2\_MSG\_NEWKEYS

debug3: receive packet: type 21

debug1: SSH2\_MSG\_NEWKEYS received

debug2: set\_newkeys: mode 0

debug1: rekey in after 4294967296 blocks

debug3: unable to connect to pipe \\.\pipe\openssh-ssh-agent, error: 2

debug1: pubkey\_prepare: ssh\_get\_authentication\_socket: No such file or directory

debug1: Will attempt key: C:\Users\luigi/.ssh/id\_rsa RSA SHA256:FJyfIFwNR7GRNwp0jMR/8ekgEogxgLa79EdtIKnGRwQ

debug1: Will attempt key: C:\Users\luigi/.ssh/id\_dsa

debug1: Will attempt key: C:\Users\luigi/.ssh/id\_ecdsa

debug1: Will attempt key: C:\Users\luigi/.ssh/id\_ed25519

debug1: Will attempt key: C:\Users\luigi/.ssh/id\_xmss

debug2: pubkey\_prepare: done

debug3: send packet: type 5

debug3: receive packet: type 6

debug2: service\_accept: ssh-userauth

debug1: SSH2\_MSG\_SERVICE\_ACCEPT received

debug3: send packet: type 50

debug3: receive packet: type 53

debug3: input\_userauth\_banner

DD-WRT v24-sp2 std (c) 2011 NewMedia-NET GmbH

Release: 06/14/11 (SVN revision: 17201M)

debug3: receive packet: type 51

debug1: Authentications that can continue: publickey,password

debug3: start over, passed a different list publickey,password

debug3: preferred publickey,keyboard-interactive,password

debug3: authmethod\_lookup publickey

debug3: remaining preferred: keyboard-interactive,password

debug3: authmethod\_is\_enabled publickey

debug1: Next authentication method: publickey

debug1: Offering public key: C:\Users\luigi/.ssh/id\_rsa RSA SHA256:FJyfIFwNR7GRNwp0jMR/8ekgEogxgLa79EdtIKnGRwQ

debug3: send packet: type 50

debug2: we sent a publickey packet, wait for reply

debug3: receive packet: type 51

debug1: Authentications that can continue: publickey,password

debug1: Trying private key: C:\Users\luigi/.ssh/id\_dsa

debug3: no such identity: C:\Users\luigi/.ssh/id\_dsa: No such file or directory

debug1: Trying private key: C:\Users\luigi/.ssh/id\_ecdsa

debug3: no such identity: C:\Users\luigi/.ssh/id\_ecdsa: No such file or directory

debug1: Trying private key: C:\Users\luigi/.ssh/id\_ed25519

debug3: no such identity: C:\Users\luigi/.ssh/id\_ed25519: No such file or directory

debug1: Trying private key: C:\Users\luigi/.ssh/id\_xmss

debug3: no such identity: C:\Users\luigi/.ssh/id\_xmss: No such file or directory

debug2: we did not send a packet, disable method

debug3: authmethod\_lookup password

debug3: remaining preferred: ,password

debug3: authmethod\_is\_enabled password

debug1: Next authentication method: password

debug3: failed to open file:C:/dev/tty error:3

debug1: read\_passphrase: can’t open /dev/tty: No such file or directory

Should I also send the -v -vv -vvv version?  
(they look the same)

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<div class="post-metadata">

**Author:** ![lawless-m](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/lawless-m/32/30869_2.png) [@lawless-m](https://discourse.julialang.org/u/lawless-m)\
**Post date:** [December 5, 2021, 3:07pm UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/14 "2021-12-05T15:07:07Z")

</div>

> [@GalloLuigi](#):
>
> DD-WRT v24-sp2 std (c) 2011 NewMedia-NET GmbH

Is it correct that you are trying to log into your DD-WRT ?

Or are you trying to connect to a machine on the other side of the firewall ?

If so, I suspect you don’t have NAT port forwarding enabled to forward it to the machine inside the firewall.

If you’re not familiar with that, here are some articles.

[https://forum.dd-wrt.com/wiki/index.php/Port\_Forwarding](https://forum.dd-wrt.com/wiki/index.php/Port_Forwarding)

> **[How Do I Set Up Port Forwarding on a DD-WRT Router?](https://blog.flashrouters.com/2022/01/13/how-to-use-port-forwarding-with-dd-wrt-routers-dd-wrt-tutorial/)**
>
> Discover the simple steps to using Port Fowarding to your advantage when using a DD-WRT router and make your network work again.

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<div class="post-metadata">

**Author:** ![GalloLuigi](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/galloluigi/32/31349_2.png) [@GalloLuigi](https://discourse.julialang.org/u/GalloLuigi)\
**Post date:** [December 5, 2021, 4:36pm UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/15 "2021-12-05T16:36:16Z")

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I am trying to connect to the machines on the other firewall side.

The situation is strange, I can connect with ssh to the machines via the visual studio extension but I cannot via julia programs or windows terminal.

This is my VSCode extension:

 ![vs_ext](https://global.discourse-cdn.com/julialang/original/3X/7/8/785a2953978d91d0c172e8e94ef110d11a5b0388.png)

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<div class="post-metadata">

**Author:** ![lawless-m](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/lawless-m/32/30869_2.png) [@lawless-m](https://discourse.julialang.org/u/lawless-m)\
**Post date:** [December 5, 2021, 4:57pm UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/16 "2021-12-05T16:57:11Z")

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Do you get a terminal window in VSCode

Do you control the machine (i.e. have root) on the ssh host?

It could be that the University only gives you scp/sftp access and not a terminal account.

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<div class="post-metadata">

**Author:** ![GalloLuigi](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/galloluigi/32/31349_2.png) [@GalloLuigi](https://discourse.julialang.org/u/GalloLuigi)\
**Post date:** [December 5, 2021, 6:51pm UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/17 "2021-12-05T18:51:20Z")

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I have a non-root account.  
I created the ssh keys with this account.  
I can run julia programs, create files etc

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<div class="post-metadata">

**Author:** ![lawless-m](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/lawless-m/32/30869_2.png) [@lawless-m](https://discourse.julialang.org/u/lawless-m)\
**Post date:** [December 5, 2021, 7:00pm UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/18 "2021-12-05T19:00:25Z")

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hmm, it is quite the mystery

I too have struggled with getting a Windows 10 machine to connect over the public internet with no answers

I have PMd you a message with a shell account you can try

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<div class="post-metadata">

**Author:** ![GalloLuigi](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/galloluigi/32/31349_2.png) [@GalloLuigi](https://discourse.julialang.org/u/GalloLuigi)\
**Post date:** [December 5, 2021, 7:58pm UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/19 "2021-12-05T19:58:02Z")

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With your machine I can connect via terminal in ssh without problems.  
The problem probably is my virtual machines.  
In these days I will be doing further tests with Julia.  
How can I upload my project from github?  
Thank you very much for everything ,you have been very kind!

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<div class="post-metadata">

**Author:** ![lawless-m](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/lawless-m/32/30869_2.png) [@lawless-m](https://discourse.julialang.org/u/lawless-m)\
**Post date:** [December 5, 2021, 8:37pm UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/20 "2021-12-05T20:37:33Z")

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Dec 5 20:35:26 pox sshd[2619]: Unable to negotiate with YOUR-IP port 59046: no matching key exchange method found. Their offer: diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1 [preauth]

No need for -o KEx…

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<div class="post-metadata">

**Author:** ![lawless-m](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/lawless-m/32/30869_2.png) [@lawless-m](https://discourse.julialang.org/u/lawless-m)\
**Post date:** [December 5, 2021, 8:51pm UTC](https://discourse.julialang.org/t/why-cant-i-use-julia-addprocs-econnrefused/72477/21 "2021-12-05T20:51:09Z")

</div>

If your files are laid out in the correct way in Git you can add direct from Julia package prompt, like this one of mine

julia\> ]  
`(@v1.7) pkg> add https://github.com/lawless-m/DFUtil.jl`

Making packages is a lot easier than it sounds

[https://pkgdocs.julialang.org/v1/creating-packages/](https://pkgdocs.julialang.org/v1/creating-packages/)

> **[Make your Julia package in 10 minutes · Zlatan's Journal](https://zlatanvasovic.github.io/blog/2020/06/make-your-julia-package/)**
>
> Making a package can be a hassle, but in Julia it doesn't have to be so. — An exploratory journey into interdisciplinary research. Created by Zlatan Vasović.

Or you can just copy the files into the file system and use “include”

`julia> include("/path/to/julia/file.jl")`

or tell julia where to look for module files

`push!(LOAD_PATH,"/path/to/packages/")`

which you can put in `~/.julia/config/startup.jl`

along with anything else you might want at startup

such as some useful packages for develeopment `using Revise` and `using OhMyREPL`