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ssh-copy-id checklist for why it does not work
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25-09-2022 7:55pm#1
Having previously worked for me, I cant quite get passwordless to work on our machines. Assuming that it is a server side issue as i can ssh-copy-id to a seperate server in a seperate location
Here is my output
$ ssh -vvv root@server.us.company.com
OpenSSH_9.0p1, OpenSSL 1.1.1q 5 Jul 2022
debug1: Reading configuration data /c/Users/myself/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts' -> '/c/Users/myself/.ssh/known_hosts'
debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts2' -> '/c/Users/myself/.ssh/known_hosts2'
debug2: resolving "site14bast.us.company.com" port 22
debug3: resolve_host: lookup site14bast.us.company.com:22
debug3: ssh_connect_direct: entering
debug1: Connecting to site14bast.us.company.com [10.80.79.9] port 22.
debug3: set_sock_tos: set socket 4 IP_TOS 0x48
debug1: Connection established.
debug1: identity file /c/Users/myself/.ssh/id_rsa type 0
debug1: identity file /c/Users/myself/.ssh/id_rsa-cert type -1
debug1: identity file /c/Users/myself/.ssh/id_ecdsa type -1
debug1: identity file /c/Users/myself/.ssh/id_ecdsa-cert type -1
debug1: identity file /c/Users/myself/.ssh/id_ecdsa_sk type -1
debug1: identity file /c/Users/myself/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /c/Users/myself/.ssh/id_ed25519 type -1
debug1: identity file /c/Users/myself/.ssh/id_ed25519-cert type -1
debug1: identity file /c/Users/myself/.ssh/id_ed25519_sk type -1
debug1: identity file /c/Users/myself/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /c/Users/myself/.ssh/id_xmss type -1
debug1: identity file /c/Users/myself/.ssh/id_xmss-cert type -1
debug1: identity file /c/Users/myself/.ssh/id_dsa type 1
debug1: identity file /c/Users/myself/.ssh/id_dsa-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_9.0
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1
debug1: compat_banner: match: OpenSSH_6.6.1 pat OpenSSH_6.6.1* compat 0x04000002
debug2: fd 4 setting O_NONBLOCK
debug1: Authenticating to site14bast.us.company.com:22 as 'root'
debug3: record_hostkey: found key type ED25519 in file /c/Users/myself/.ssh/known_hosts:4
debug3: load_hostkeys_file: loaded 1 keys from site14bast.us.company.com
debug1: load_hostkeys: fopen /c/Users/myself/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory
debug3: order_hostkeyalgs: have matching best-preference key type ssh-ed25519-cert-v01@openssh.com, using HostkeyAlgorithms verbatim
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: sntrup761x25519-sha512@openssh.com,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,ext-info-c
debug2: host key algorithms: ssh-ed25519-cert-v01@openssh.com,ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,sk-ssh-ed25519-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ssh-ed25519@openssh.com,sk-ecdsa-sha2-nistp256@openssh.com,rsa-sha2-512,rsa-sha2-256
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: curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: host key algorithms: ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: ciphers stoc: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: MACs ctos: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: MACs stoc: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: compression ctos: none,zlib@openssh.com
debug2: compression stoc: none,zlib@openssh.com
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: curve25519-sha256@libssh.org
debug1: kex: host key algorithm: ssh-ed25519
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: SSH2_MSG_KEX_ECDH_REPLY received
debug1: Server host key: ssh-ed25519 SHA256:r3gmzLEuQcaC4IR6vVxFeE/7x5T2jWBOxJBKs1HXyCc
debug3: record_hostkey: found key type ED25519 in file /c/Users/myself/.ssh/known_hosts:4
debug3: load_hostkeys_file: loaded 1 keys from site14bast.us.company.com
debug1: load_hostkeys: fopen /c/Users/myself/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory
debug1: Host 'site14bast.us.company.com' is known and matches the ED25519 host key.
debug1: Found key in /c/Users/myself/.ssh/known_hosts:4
debug3: send packet: type 21
debug2: ssh_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: ssh_set_newkeys: mode 0
debug1: rekey in after 134217728 blocks
debug1: Skipping ssh-dss key /c/Users/myself/.ssh/id_dsa - corresponding algo not in PubkeyAcceptedAlgorithms
debug1: Will attempt key: /c/Users/myself/.ssh/id_rsa RSA SHA256:OT7Njjnp3KTxy56MwygFSyPr/Eo5u/0DI6xyPrEP3Zc
debug1: Will attempt key: /c/Users/myself/.ssh/id_ecdsa
debug1: Will attempt key: /c/Users/myself/.ssh/id_ecdsa_sk
debug1: Will attempt key: /c/Users/myself/.ssh/id_ed25519
debug1: Will attempt key: /c/Users/myself/.ssh/id_ed25519_sk
debug1: Will attempt key: /c/Users/myself/.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 51
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
debug3: start over, passed a different list publickey,gssapi-keyex,gssapi-with-mic,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/myself/.ssh/id_rsa RSA SHA256:OT7Njjnp3KTxy56MwygFSyPr/Eo5u/0DI6xyPrEP3Zc
debug1: send_pubkey_test: no mutual signature algorithm
debug1: Trying private key: /c/Users/myself/.ssh/id_ecdsa
debug3: no such identity: /c/Users/myself/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: /c/Users/myself/.ssh/id_ecdsa_sk
debug3: no such identity: /c/Users/myself/.ssh/id_ecdsa_sk: No such file or directory
debug1: Trying private key: /c/Users/myself/.ssh/id_ed25519
debug3: no such identity: /c/Users/myself/.ssh/id_ed25519: No such file or directory
debug1: Trying private key: /c/Users/myself/.ssh/id_ed25519_sk
debug3: no such identity: /c/Users/myself/.ssh/id_ed25519_sk: No such file or directory
debug1: Trying private key: /c/Users/myself/.ssh/id_xmss
debug3: no such identity: /c/Users/myself/.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
root@site14bast.us.company.com's password:
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Comments
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debug3: no such identity: /c/Users/myself/.ssh/id_xmss: No such file or directory
Permissions?
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You're running openssh 9.0 which has disabled SHA-1 signatures for RSA keys and a few other less secure settings as well as turning off DSA by default.
The server is running OpenSSH_6.6.1 so you'll need to find something they can both agree on.
Your end on 9.0 is denying the use of the DSA key, not the remote server end.
debug1: Skipping ssh-dss key /c/Users/myself/.ssh/id_dsa - corresponding algo not in PubkeyAcceptedAlgorithms
You should create a new key just for this connection - maybe try an ecdsa one to make both sides happy.
ssh-keygen -t ecdsa
You can even use it just for this connection by setting a stanza in ~/.ssh/.config like below.
Once that's in place (and the permissions are right) you can connect by typing just ssh server
=============================================
Host server
HostName server.us.company.com
IdentityFile ~/.ssh/id_ecdsa
Port 22
User root
============================================
If ecdsa doesn't work, try re-enabling DSA as an offered option on your end if you're in a hurry.
Otherwise try various keytypes from man ssh-keygen until you find something mutually agreeable.
PS: This should also get you thinking about why the other end isn't updated to something more recent and why you're logging in as 'root'!
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