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  • userauth_pubkey: key type ssh-rsa not in PubkeyAcceptedKeyTypes [preauth]

    Posted on

    I am trying to setup SSH key for rhel8 and I seem to be unable to get it working. I have done the same steps on rhel 7.8 setup and it works fine. Any help would be appreciated.

    I keep getting the following error and then it prompts me for my password.

    Jul 27 20:09:34 host-192-168-10-50 sshd[2407]: userauth_pubkey: key type ssh-rsa not in PubkeyAcceptedKeyTypes [preauth]

    Here is my sshd config.

    [root@host-192-168-10-50 ssh]# sshd -T
    port 22
    addressfamily any
    listenaddress [::]:22
    listenaddress 0.0.0.0:22
    usepam yes
    logingracetime 120
    x11displayoffset 10
    x11maxdisplays 1000
    maxauthtries 6
    maxsessions 10
    clientaliveinterval 300
    clientalivecountmax 0
    streamlocalbindmask 0177
    permitrootlogin no
    ignorerhosts yes
    ignoreuserknownhosts no
    hostbasedauthentication no
    hostbasedusesnamefrompacketonly no
    pubkeyauthentication yes
    kerberosauthentication no
    kerberosorlocalpasswd yes
    kerberosticketcleanup yes
    kerberosuniqueccache no
    kerberosusekuserok yes
    gssapienablek5users no
    gssapiauthentication yes
    gssapicleanupcredentials no
    gssapikeyexchange no
    gssapistrictacceptorcheck yes
    gssapistorecredentialsonrekey no
    gssapikexalgorithms gss-gex-sha1-,gss-group14-sha1-
    passwordauthentication yes
    kbdinteractiveauthentication no
    challengeresponseauthentication no
    printmotd yes
    printlastlog yes
    x11forwarding yes
    x11uselocalhost yes
    permittty yes
    permituserrc yes
    strictmodes yes
    tcpkeepalive yes
    permitemptypasswords no
    compression yes
    gatewayports no
    usedns no
    allowtcpforwarding yes
    allowagentforwarding yes
    disableforwarding no
    allowstreamlocalforwarding yes
    streamlocalbindunlink no
    fingerprinthash SHA256
    exposeauthinfo no
    pidfile /var/run/sshd.pid
    xauthlocation /usr/bin/xauth
    ciphers aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc,aes192-cbc,aes256-cbc
    macs hmac-sha2-512,hmac-sha2-256,hmac-sha1,hmac-sha1-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com
    banner /etc/issue
    forcecommand none
    chrootdirectory none
    trustedusercakeys none
    revokedkeys none
    authorizedprincipalsfile none
    versionaddendum none
    authorizedkeyscommand none
    authorizedkeyscommanduser none
    authorizedprincipalscommand none
    authorizedprincipalscommanduser none
    hostkeyagent none
    kexalgorithms 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
    casignaturealgorithms ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
    hostbasedacceptedkeytypes 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,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
    hostkeyalgorithms 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,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
    pubkeyacceptedkeytypes ssh-ed25519,ssh-rsa,rsa-sha2-256,rsa-sha2-512
    rdomain none
    loglevel INFO
    syslogfacility AUTHPRIV
    authorizedkeysfile .ssh/authorized_keys
    hostkey /etc/ssh/ssh_host_rsa_key
    hostkey /etc/ssh/ssh_host_ecdsa_key
    hostkey /etc/ssh/ssh_host_ed25519_key
    acceptenv LANG
    acceptenv LC_CTYPE
    acceptenv LC_NUMERIC
    acceptenv LC_TIME
    acceptenv LC_COLLATE
    acceptenv LC_MONETARY
    acceptenv LC_MESSAGES
    acceptenv LC_PAPER
    acceptenv LC_NAME
    acceptenv LC_ADDRESS
    acceptenv LC_TELEPHONE
    acceptenv LC_MEASUREMENT
    acceptenv LC_IDENTIFICATION
    acceptenv LC_ALL
    acceptenv LANGUAGE
    acceptenv XMODIFIERS
    authenticationmethods any
    subsystem sftp /usr/libexec/openssh/sftp-server
    maxstartups 10:30:100
    permittunnel no
    ipqos af21 cs1
    rekeylimit 0 0
    permitopen any
    permitlisten any
    permituserenvironment no

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