SSH Only works as a guest [SOLVED]

Clyde

@chaska04 Try to use ssh with the -v option (= verbose) to get a more detailed output.

ssh -v pi@retropies_network_address

You can expand the output even further with -vvand -vvv. If you post the output here, please use a code block, but make sure to anonymize any compromising information in the text.

edit: This command is meant to be entered on the system that tries to connect to the pi, not on the pi itself. You'll have to change "retropies_network_address" to, you guessed it, your Retropie's network address. ;)

ChasKa04

@clyde
I typed in your command on my windows pc and the output was a failure

'ssh' is not recognized as an internal or external command,
operable program or batch file.

mitu

@chaska04 Windows does not have SSH built it, you need to download a SSH client for windows - Putty is the most used and it's open source.

ChasKa04

@mitu
How do I type in the command that @Clyde send me on PuTTY?

mitu

@chaska04 https://www.ssh.com/ssh/putty/putty-manuals/0.68/Chapter3.html#using-cmdline

ChasKa04

@mitu Could I just run the command on a Mac?

mitu

@chaska04 said in SSH Only works as a guest:

Could I just run the command on a Mac ?

Sure, macOS has ssh built it, just run the command @Clyde suggested from a terminal window.

ChasKa04

@mitu My SUCCESSFUL output was:

OpenSSH_7.6p1, LibreSSL 2.6.2
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 48: Applying options for *
debug1: Connecting to <MyIp> port 22.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file /Users/Steve/.ssh/id_rsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/Steve/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/Steve/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/Steve/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/Steve/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/Steve/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/Steve/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/Steve/.ssh/id_ed25519-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.6
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.7p1 Raspbian-5+deb8u3
debug1: match: OpenSSH_6.7p1 Raspbian-5+deb8u3 pat OpenSSH* compat 0x04000000
debug1: Authenticating to <MyIp>:22 as 'pi'
debug1: SSH2_MSG_KEXINIT sent
Connection closed by <MyIp> port 22
``

Clyde

@chaska04 With successful you don't mean a working connection, I presume? Because the connection seems to have been closed right after the start of the key exchange. Normally the debug1: SSH2_MSG_KEXINIT sent is followed by a debug1: SSH2_MSG_KEXINIT received and more messages about the key exchange.

Can you read the log file /var/log/auth.log from Retropie and show us the lines with timestamps that correspond with your connection attempt?

Does ssh show more than

debug1: SSH2_MSG_KEXINIT sent
Connection closed by <MyIp> port 22

if used with -vv or -vvv?

By the way, I'm not an expert in ssh or networking, I'm just trying to collect more information for people who are. So if anyone here with more knowledge wants to step in, be welcome. :)

ChasKa04

When I meant successful I was referencing to when it didn't work on my PC. Because Termin Doesn't have SSH built in!

Clyde

@chaska04 I thought as much, but it's better to know for sure. You can display the contents of /var/log/auth.log with this command on the Retropie terminal console:

cat /var/log/auth.log

ChasKa04

@clyde When I run this command it displays a long output which is impossible to manually copy. Is there a certain part I should Copy.

ChasKa04

@chaska04 Ohhh, you want me to copy the time that I ran the first command on the mac.

ChasKa04

Jan 28 10:38:39 retropie sshd(990]: error: key_load_public: invalid format 
Jan 28 10:38:39 retropie sshd[990]: error: Could not load host key: /etc/ssh/ssh_host_rsa_key
Jan 28 10:38:39 retropie sshd[990]: error: key_load_public: invalid format 
Jan 28 10:38:39 retropie sshd(990]: error: Could not load host key: /etr_zsshzssh_host_dsa_key
Jan 28 10:38:39 retropie sshd[990]: error: key_load_public: invalid format 
Jan 28 10:38:39 retropie sshd[990]: error: Could not load host key: /etc/ssh/ssh_host_ecdsa_key
Jan 28 10:38:39 retropie sshd(990]: error: key_load_public: invalid format
Jan 28 10:38:39 retropie sshd[990]: error: Could not load host key: /etc/ssh/ssh_host_ed25519_key
Jan 28 10:38:39 retropie sshd[990]: fatal: Mo supported key exchange algorithms Epreauth]
Jan 28 11:17:01 retropie CRON[1051] : pan_unix(cron:session): session opened for user root by (uid=0)
Jan 28 11:17:01 retropie CRON[1051] : pan_unix(cron:session): session closed for user root

I used an OCR so The spelling may be a bit "iffy".

iffy
full of uncertainty; doubtful.
"the prospect for classes resuming next Wednesday seems iffy"
synonyms: tentative, undecided, unsettled, unsure, unreliable, unresolved, in doubt, in the balance; informalup in the air
"that date is a bit iffy"

mitu

@chaska04 You ssh server on the retropie is broken - how did you install the system ?
Try reinstalling ssh on the retropie:

sudo apt-get install --reinstall openssh-server

ChasKa04

@mitu I installed it with an image from retropie website. In late 2017. Trying the command now.

ChasKa04

@chaska04 Sorry, No Luck. I ran the command and re-installed then rebooted.

mitu

@chaska04 Then try a complete uninstall then install again

dpkg -P openssh-server
apt-get install -y openssh-server

ChasKa04

@mitu Ok

ChasKa04

@mitu It says the operation requires SuperUser Privilege.