I'm trying to install my SSH Server and nothing works. I think i've seen every SSH Stackoverflow site and i'm still too dumb :C

What kind of a server is it?

@inaba arch

@Bitwise I have a firewall and no i didn't do anything with ip tables. It says key_load_private: invalid format

When in doubt arch wiki:
https://wiki.archlinux.org/index.ph...

Hmm maybe something went wrong with generating keys.

Could you show us how you generated them?

@rootshell ssh-keygen -t rsa -f path/to/the/keys

@rootshell when i give the path to the private key it works but connecting to the server won't work

@nobes have you checked out the copy-ssh-id command? I'm lazy. 😄

@nobes
Checklist:
- ssh daemon is running
- ip:port is correct
- username is correct
- sshd supports rsa
- rsa file looks okay in text editor
- rsa key copied in correct file
- rights set correctly on file

@rootshell Thanks. I'll check that

@Bitwise I connect from localhost and then it says Host key verification failed

@Bitwise now when i run sshd -t to verify that everything is ok it says:
Could not load host key: /etc/ssh/ssh_host_rsa_key and the ecdsa key and the ed25519 key

@Bitwise No! Can i login with password with the normal ssh command?

@Bitwise but it says it's listening to port 22 and it responds but it can't verify

@bitwise the output from systemctl status sshd:

sshd.service - OpenSSH Daemon

Loaded: loaded (/usr/lib/systemd/system/sshd.service; disabled; vendor preset: disab>

Active: active (running) since Tue 2018-05-29 18:52:02 CEST; 12s ago

Main PID: 1382 (sshd)

Tasks: 1 (limit: 4393)

Memory: 828.0K

CGroup: /system.slice/sshd.service

└─1382 /usr/bin/sshd -D

Mai 29 18:52:02 jonas-server systemd[1]: Started OpenSSH Daemon.

Mai 29 18:52:02 jonas-server sshd[1382]: Server listening on 0.0.0.0 port 22.

Mai 29 18:52:02 jonas-server sshd[1382]: Server listening on :: port 22.

[jonas@jonas-server ssh]$ ssh jonas@localhost -p 22

The authenticity of host 'localhost (::1)' can't be established.

ECDSA key fingerprint is SHA256:roAn...

Are you sure you want to continue connecting (yes/no)?

Host key verification failed.

@Bitwise ssh -o StrictHostKeyChecking=no user@localhost asked me for a password but which password?

@Bitwise That doesn't work :/

@Bitwise thanks now it works! Forgot to change "user@localhost" to "jonas@localhost"

@Bitwise It still says "Host key verification failed."

@bitwise now there is just one line "jonas@localhost: Permission denied (publickey).

"

@Bitwise thanks i thought the authorized keys is a folder... Now it works with the key! Thank you!!

@bitwise ok thanks

@Bitwise how can i access the ssh server from the local network? Do i need to change something in the iptables or hosts.allow or in the sshd_config?

Everything checked and restarted the server but I can't access from the local network. I also can't telnet the server on port 22

@Bitwise when i check the port with nmap it says that the port is filtered, that means it doesn't get an answer from the ssh server 🤔

@Bitwise With ipv6 too..

@Bitwise Everything fine i was sleeping too. Didn't knew that linux has a firewall which blocks all ports. That was the Problem! Thank you very much!