I try to run an SSH Server with openSSH and configure a passwordless user for ssh tunneling
root@kali:~/myssh# ssh -V
OpenSSH_8.3p1 Debian-1, OpenSSL 1.1.1g 21 Apr 2020
I already testing SSH Server on raspberry and CENTOS VPS and I got an error like below
[email protected]: Permission denied (publickey).
my ssh server has a user ' tunnel ' without a password and I generate RSA keys ( without the passphrase ) with ssh-keygen for this user and also an HostKey File
ssh-keygen -t rsa -f ~/myssh/tunnel/id_rsa -P ""
ssh-keygen -t ed25519 -f ~/myssh/ssh_host_ed25519_key
and Here is my custon_config.conf ( ~/myssh/custon_config.conf )
Protocol 2
ListenAddress 192.168.1.99
HostKey /root/myssh/ssh_host_ed25519_key
Port 2222
Ciphers [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
KexAlgorithms curve25519-sha256,[email protected],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
MACs [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
PermitRootLogin no
AuthorizedKeysFile /root/myssh/tunnel/id_rsa
PubkeyAuthentication yes
PasswordAuthentication no
ChallengeResponseAuthentication no
I run my ssh server using this command
/usr/sbin/sshd -f /root/myssh/tunnel_ssh.conf && while true;do sleep 30; done;
and try to connect it on my pc like this
ssh [email protected] -p 2222 -i /mykeys/id_rsa
the id_rsa file is the tunnel user RSA key that generated on Server
Now I don't know what's wrong with my keys and permissions also I try the .pub key and it didn't work. I'll appreciate that if somebody helps me to fix this
UPDATE
I try to regenerate the keys for tunnel user and try to connect with -vvv
I try to run an SSH Server with openSSH and configure a passwordless user for ssh tunneling
root@kali:~/myssh# ssh -V
OpenSSH_8.3p1 Debian-1, OpenSSL 1.1.1g 21 Apr 2020
I already testing SSH Server on raspberry and CENTOS VPS and I got an error like below
[email protected]: Permission denied (publickey).
my ssh server has a user ' tunnel ' without a password and I generate RSA keys ( without the passphrase ) with ssh-keygen for this user and also an HostKey File
ssh-keygen -t rsa -f ~/myssh/tunnel/id_rsa -P ""
ssh-keygen -t ed25519 -f ~/myssh/ssh_host_ed25519_key
and Here is my custon_config.conf ( ~/myssh/custon_config.conf )
Protocol 2
ListenAddress 192.168.1.99
HostKey /root/myssh/ssh_host_ed25519_key
Port 2222
Ciphers [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
KexAlgorithms curve25519-sha256,[email protected],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
MACs [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
PermitRootLogin no
AuthorizedKeysFile /root/myssh/tunnel/id_rsa
PubkeyAuthentication yes
PasswordAuthentication no
ChallengeResponseAuthentication no
I run my ssh server using this command
/usr/sbin/sshd -f /root/myssh/tunnel_ssh.conf && while true;do sleep 30; done;
and try to connect it on my pc like this
ssh [email protected] -p 2222 -i /mykeys/id_rsa
the id_rsa file is the tunnel user RSA key that generated on Server
Now I don't know what's wrong with my keys and permissions also I try the .pub key and it didn't work. I'll appreciate that if somebody helps me to fix this
UPDATE
I try to regenerate the keys for tunnel user and try to connect with -vvv ( this run on Termux )
OpenSSH_8.4p1, OpenSSL 1.1.1h 22 Sep 2020
debug1: Reading configuration data /data/data/com.termux/files/usr/etc/ssh/ssh_config
debug2: resolve_canonicalize: hostname 192.168.1.99 is address
debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts' -> '/data/data/com.termux/files/home/.ssh/known_hosts'
debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts2' -> '/data/data/com.termux/files/home/.ssh/known_hosts2'
debug1: Authenticator provider $SSH_SK_PROVIDER did not resolve; disabling
debug2: ssh_connect_direct
debug1: Connecting to 192.168.1.99 [192.168.1.99] port 2222.
debug1: Connection established.
debug1: identity file /data/data/com.termux/files/home/myssh/id_rsa.pub type 0
debug1: identity file /data/data/com.termux/files/home/myssh/id_rsa.pub-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.4
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.3p1 Debian-1
debug1: match: OpenSSH_8.3p1 Debian-1 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 192.168.1.99:2222 as 'tunnel'
debug3: put_host_port: [192.168.1.99]:2222
debug3: hostkeys_foreach: reading file "/data/data/com.termux/files/home/.ssh/known_hosts"
debug3: record_hostkey: found key type ED25519 in file /data/data/com.termux/files/home/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from [192.168.1.99]:2222
debug3: order_hostkeyalgs: prefer hostkeyalgs: [email protected],ssh-ed25519
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,[email protected],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,ext-info-c
debug2: host key algorithms: [email protected],ssh-ed25519,[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected],rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected],zlib
debug2: compression stoc: none,[email protected],zlib
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256,[email protected],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
debug2: host key algorithms: ssh-ed25519
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected]
debug2: compression stoc: none,[email protected]
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ssh-ed25519
debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none
debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: Server host key: ssh-ed25519 SHA256:EyzYn+F+Awaoke1PPJfMECvyopckZG/s9S9hjsDn8hw
debug3: put_host_port: [192.168.1.99]:2222
debug3: put_host_port: [192.168.1.99]:2222
debug3: hostkeys_foreach: reading file "/data/data/com.termux/files/home/.ssh/known_hosts"
debug3: record_hostkey: found key type ED25519 in file /data/data/com.termux/files/home/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from [192.168.1.99]:2222
debug3: hostkeys_foreach: reading file "/data/data/com.termux/files/home/.ssh/known_hosts"
debug3: record_hostkey: found key type ED25519 in file /data/data/com.termux/files/home/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from [192.168.1.99]:2222
debug1: Host '[192.168.1.99]:2222' is known and matches the ED25519 host key.
debug1: Found key in /data/data/com.termux/files/home/.ssh/known_hosts:1
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey out after 134217728 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 134217728 blocks
debug1: Will attempt key: /data/data/com.termux/files/home/myssh/id_rsa.pub RSA SHA256:cbuXmcG8RZ6OVZJ757b1e9gbR8rLijiw/4FzJGSKvZw explicit
debug2: pubkey_prepare: done
debug3: send packet: type 5
debug3: receive packet: type 7
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,[email protected],ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected]>
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 51
debug1: Authentications that can continue: publickey
debug3: start over, passed a different list publickey
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: /data/data/com.termux/files/home/myssh/id_rsa.pub RSA SHA256:cbuXmcG8RZ6OVZJ757b1e9gbR8rLijiw/4FzJGSKvZw explicit
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
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.
[email protected]: Permission denied (publickey).