Date: Tue, 22 Nov 2016 16:37:22 +0900 From: KIRIYAMA Kazuhiko <kiri@kx.openedu.org> To: freebsd-current <freebsd-current@freebsd.org> Cc: kiri@kx.openedu.org Subject: fatal: Fssh_packet_write_poll: Connection from xxx.xxx.xx.xx port yyyyy: Permission denied Message-ID: <201611220737.uAM7bMSY072062@kx.openedu.org>
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Hi, all I've updated to HEAD(r308871) at 2 days ago, and also ports too(r426562). Then all stuffs including applications have been updated and tried to slogin to this host,but can't connect with the message `userauth_pubkey: key type ssh-dss not in PubkeyAcceptedKeyTypes [preauth]' in /var/log/auth.log. I found new OpenSSH-7.* has not been supported DSA and to connect from client with old ssh(lower than OpenSSH-7.0),set `ssh-dss' or some values set to relevant variables in /etc/ssh/sshd_config. According to [1] and [2] I've set these variables as below: PubkeyAcceptedKeyTypes=+ssh-dss HostKeyAlgorithms=+ssh-dss KexAlgorithms=+diffie-hellman-group-exchange-sha256 and successfully slogined: kiri@kazu:~[998]% slogin -v tfc OpenSSH_6.2p2, OpenSSL 0.9.8y 5 Feb 2013 debug1: Reading configuration data /home/kiri/.ssh/config debug1: /home/kiri/.ssh/config line 13: Applying options for tfc debug1: Reading configuration data /etc/ssh/ssh_config debug1: Connecting to xx.xxxxxx.xxx [yyy.yyy.yy.yy] port zzzzz. debug1: Connection established. debug1: identity file /home/kiri/.ssh/id_rsa type -1 debug1: identity file /home/kiri/.ssh/id_rsa-cert type -1 debug1: identity file /home/kiri/.ssh/id_dsa type 2 debug1: identity file /home/kiri/.ssh/id_dsa-cert type -1 debug1: identity file /home/kiri/.ssh/id_ecdsa type -1 debug1: identity file /home/kiri/.ssh/id_ecdsa-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_6.2_hpn13v11 FreeBSD-20130515 debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2 FreeBSD-20160310 debug1: match: OpenSSH_7.2 FreeBSD-20160310 pat OpenSSH* debug1: Remote is not HPN-aware debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-ctr hmac-sha1-etm@openssh.com none debug1: kex: client->server aes128-ctr hmac-sha1-etm@openssh.com none debug1: sending SSH2_MSG_KEX_ECDH_INIT debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ECDSA 41:61:5e:8c:03:c7:70:c4:e7:d8:52:56:2a:36:86:21 debug1: Host '[xx.xxxxxx.xxx]:zzzzz' is known and matches the ECDSA host key. debug1: Found key in /home/kiri/.ssh/known_hosts:172 debug1: ssh_ecdsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: Roaming not allowed by server debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey,keyboard-interactive debug1: Next authentication method: publickey debug1: Trying private key: /home/kiri/.ssh/id_rsa debug1: Offering DSA public key: /home/kiri/.ssh/id_dsa debug1: Server accepts key: pkalg ssh-dss blen 434 debug1: read PEM private key done: type DSA debug1: Authentication succeeded (publickey). Authenticated to xx.xxxxxx.xxx ([yyy.yyy.yy.yy]:zzzzz). debug1: HPN to Non-HPN Connection debug1: Final hpn_buffer_size = 2097152 debug1: HPN Disabled: 0, HPN Buffer Size: 2097152 debug1: channel 0: new [client-session] debug1: Enabled Dynamic Window Scaling debug1: Requesting no-more-sessions@openssh.com debug1: Entering interactive session. debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0 Last login: Tue Nov 22 16:21:34 2016 from flets-sg1027.kamome.or.jp FreeBSD 12.0-CURRENT (XIJ) #13 r308871M: Sun Nov 20 15:51:21 JST 2016 Welcome to FreeBSD! Release Notes, Errata: https://www.FreeBSD.org/releases/ Security Advisories: https://www.FreeBSD.org/security/ FreeBSD Handbook: https://www.FreeBSD.org/handbook/ FreeBSD FAQ: https://www.FreeBSD.org/faq/ Questions List: https://lists.FreeBSD.org/mailman/listinfo/freebsd-questions/ FreeBSD Forums: https://forums.FreeBSD.org/ Documents installed with the system are in the /usr/local/share/doc/freebsd/ directory, or can be installed later with: pkg install en-freebsd-doc For other languages, replace "en" with a language code like de or fr. Show the version of FreeBSD installed: freebsd-version ; uname -a Please include that output and any error messages when posting questions. Introduction to manual pages: man man FreeBSD directory layout: man hier Edit /etc/motd to change this login announcement. To see the output from when your computer started, run dmesg(8). If it has been replaced with other messages, look at /var/run/dmesg.boot. -- Francisco Reyes <lists@natserv.com> admin@kx:~ % And so try to scp files from this host,then failed as below: kiri@kazu:~[1028]% scp -vvv tfc:/jails/desktop/commonjail/home/kiri/projects/xemacs/xemacs-packages/sdoc-mode-1.10-pkg.tar.gz ~/projects/xemacs/xemacs-packages/sdoc-mode-1.10-pkg.tar.gz Executing: program /usr/bin/ssh host tfc, user (unspecified), command scp -v -f /jails/desktop/commonjail/home/kiri/projects/xemacs/xemacs-packages/sdoc-mode-1.10-pkg.tar.gz OpenSSH_6.2p2, OpenSSL 0.9.8y 5 Feb 2013 debug1: Reading configuration data /home/kiri/.ssh/config debug1: /home/kiri/.ssh/config line 13: Applying options for tfc debug1: Reading configuration data /etc/ssh/ssh_config debug2: ssh_connect: needpriv 0 debug1: Connecting to xx.xxxxxx.xxx [yyy.yyy.yy.yy] port zzzzz. debug1: Connection established. debug1: identity file /home/kiri/.ssh/id_rsa type -1 debug1: identity file /home/kiri/.ssh/id_rsa-cert type -1 debug3: Incorrect RSA1 identifier debug3: Could not load "/home/kiri/.ssh/id_dsa" as a RSA1 public key debug1: identity file /home/kiri/.ssh/id_dsa type 2 debug1: identity file /home/kiri/.ssh/id_dsa-cert type -1 debug1: identity file /home/kiri/.ssh/id_ecdsa type -1 debug1: identity file /home/kiri/.ssh/id_ecdsa-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_6.2_hpn13v11 FreeBSD-20130515 debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2 FreeBSD-20160310 debug1: match: OpenSSH_7.2 FreeBSD-20160310 pat OpenSSH* debug1: Remote is not HPN-aware debug2: fd 3 setting O_NONBLOCK debug3: put_host_port: [xx.xxxxxx.xxx]:zzzzz debug3: ssh_load_hostkeys: loading entries for host "[xx.xxxxxx.xxx]:zzzzz" from file "/home/kiri/.ssh/known_hosts" debug3: ssh_load_hostkeys: found key type ECDSA in file /home/kiri/.ssh/known_hosts:172 debug3: ssh_load_hostkeys: loaded 1 keys debug3: order_hostkeyalgs: prefer hostkeyalgs: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: 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: kex_parse_kexinit: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-rsa-cert-v01@openssh.com,ssh-dss-cert-v01@openssh.com,ssh-rsa-cert-v00@openssh.com,ssh-dss-cert-v00@openssh.com,ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se debug2: kex_parse_kexinit: 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: kex_parse_kexinit: 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: kex_parse_kexinit: none,zlib@openssh.com,zlib debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: kex_parse_kexinit: curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1 debug2: kex_parse_kexinit: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519 debug2: kex_parse_kexinit: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc debug2: kex_parse_kexinit: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc debug2: kex_parse_kexinit: 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: kex_parse_kexinit: 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: kex_parse_kexinit: none,zlib@openssh.com debug2: kex_parse_kexinit: none,zlib@openssh.com debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: mac_setup: found hmac-sha1-etm@openssh.com debug1: kex: server->client aes128-ctr hmac-sha1-etm@openssh.com none debug2: mac_setup: found hmac-sha1-etm@openssh.com debug1: kex: client->server aes128-ctr hmac-sha1-etm@openssh.com none debug1: sending SSH2_MSG_KEX_ECDH_INIT debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ECDSA 41:61:5e:8c:03:c7:70:c4:e7:d8:52:56:2a:36:86:21 debug3: put_host_port: [yyy.yyy.yy.yy]:zzzzz debug3: put_host_port: [xx.xxxxxx.xxx]:zzzzz debug3: ssh_load_hostkeys: loading entries for host "[xx.xxxxxx.xxx]:zzzzz" from file "/home/kiri/.ssh/known_hosts" debug3: ssh_load_hostkeys: found key type ECDSA in file /home/kiri/.ssh/known_hosts:172 debug3: ssh_load_hostkeys: loaded 1 keys debug1: Host '[xx.xxxxxx.xxx]:zzzzz' is known and matches the ECDSA host key. debug1: Found key in /home/kiri/.ssh/known_hosts:172 debug1: ssh_ecdsa_verify: signature correct debug2: kex_derive_keys debug2: set_newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug2: set_newkeys: mode 0 debug1: SSH2_MSG_NEWKEYS received debug1: Roaming not allowed by server debug1: SSH2_MSG_SERVICE_REQUEST sent debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /home/kiri/.ssh/id_rsa (0x0), debug2: key: /home/kiri/.ssh/id_dsa (0x8028540d0), debug2: key: /home/kiri/.ssh/id_ecdsa (0x0), debug1: Authentications that can continue: publickey,keyboard-interactive debug3: start over, passed a different list publickey,keyboard-interactive 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: Trying private key: /home/kiri/.ssh/id_rsa debug3: no such identity: /home/kiri/.ssh/id_rsa: No such file or directory debug1: Offering DSA public key: /home/kiri/.ssh/id_dsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug1: Server accepts key: pkalg ssh-dss blen 434 debug2: input_userauth_pk_ok: fp a6:95:cd:c1:9f:46:9b:8d:de:2a:30:bf:bd:f7:12:0a debug3: sign_and_send_pubkey: DSA a6:95:cd:c1:9f:46:9b:8d:de:2a:30:bf:bd:f7:12:0a debug1: read PEM private key done: type DSA debug1: Authentication succeeded (publickey). Authenticated to xx.xxxxxx.xxx ([yyy.yyy.yy.yy]:zzzzz). debug2: fd 4 setting O_NONBLOCK debug2: fd 5 setting O_NONBLOCK debug1: HPN to Non-HPN Connection debug1: Final hpn_buffer_size = 2097152 debug1: HPN Disabled: 0, HPN Buffer Size: 2097152 debug1: channel 0: new [client-session] debug1: Enabled Dynamic Window Scaling debug3: ssh_session2_open: channel_new: 0 debug2: channel 0: send open debug1: Requesting no-more-sessions@openssh.com debug1: Entering interactive session. debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0 debug2: callback start debug2: fd 3 setting TCP_NODELAY debug3: packet_set_tos: set IP_TOS 0x08 debug2: client_session2_setup: id 0 debug1: Sending command: scp -v -f /jails/desktop/commonjail/home/kiri/projects/xemacs/xemacs-packages/sdoc-mode-1.10-pkg.tar.gz debug2: channel 0: request exec confirm 1 debug2: callback done debug2: channel 0: open confirm rwindow 0 rmax 32768 debug2: tcpwinsz: 65894 for connection: 3 debug2: tcpwinsz: 65894 for connection: 3 debug2: channel 0: rcvd adjust 2097152 debug2: channel_input_status_confirm: type 99 id 0 debug2: exec request accepted on channel 0 debug2: tcpwinsz: 65894 for connection: 3 debug2: tcpwinsz: 65894 for connection: 3 debug2: tcpwinsz: 65894 for connection: 3 debug2: channel 0: rcvd ext data 58 debug2: tcpwinsz: 65894 for connection: 3 Sending file modes: C0644 16580 sdoc-mode-1.10-pkg.tar.gz debug2: channel 0: written 58 to efd 6 debug2: tcpwinsz: 65894 for connection: 3 Sink: C0644 16580 sdoc-mode-1.10-pkg.tar.gz debug2: tcpwinsz: 65894 for connection: 3 debug2: tcpwinsz: 65894 for connection: 3 sdoc-mode-1.10-pkg.tar.gz 0% 0 0.0KB/s --:-- ETAdebug2: tcpwinsz: 65894 for connection: 3 debug2: tcpwinsz: 65894 for connection: 3 debug2: tcpwinsz: 65894 for connection: 3 debug2: tcpwinsz: 65894 for connection: 3 debug2: tcpwinsz: 65894 for connection: 3 sdoc-mode-1.10-pkg.tar.gz 0% 0 0.0KB/s --:-- ETAdebug2: tcpwinsz: 65894 for connection: 3 debug2: tcpwinsz: 65894 for connection: 3 debug2: tcpwinsz: 65894 for connection: 3 debug2: tcpwinsz: 65894 for connection: 3 debug2: tcpwinsz: 65894 for connection: 3 debug2: tcpwinsz: 65894 for connection: 3 debug2: tcpwinsz: 65894 for connection: 3 debug2: tcpwinsz: 65894 for connection: 3 sdoc-mode-1.10-pkg.tar.gz 0% 0 0.0KB/s --:-- ETAdebug2: tcpwinsz: 65894 for connection: 3 debug2: tcpwinsz: 65894 for connection: 3 debug2: tcpwinsz: 65894 for connection: 3 debug2: tcpwinsz: 65894 for connection: 3 debug1: channel 0: free: client-session, nchannels 1 debug3: channel 0: status: The following connections are open: #0 client-session (t4 r0 i0/0 o0/0 fd 4/5 cc -1) debug1: fd 0 clearing O_NONBLOCK debug1: fd 1 clearing O_NONBLOCK Connection to xx.xxxxxx.xxx closed by remote host. Transferred: sent 3392, received 19492 bytes, in 2.6 seconds Bytes per second: sent 1308.6, received 7520.0 debug1: Exit status -1 lost connection kiri@kazu:~[1029]% And with the message `fatal: Fssh_packet_write_poll: Connection from xxx.xxx.xx.xx port yyyyy: Permission denied' in /var/log/auth.log: Nov 22 16:07:51 kx sshd[73878]: Accepted publickey for admin from xxx.xxx.xx.xx port 64147 ssh2: DSA SHA256:6uPsONRWeNkYjlj9BU4GZYUUeH60ZbUCB25jolvrvj8 Nov 22 16:07:51 kx sshd[73880]: fatal: Fssh_packet_write_poll: Connection from xxx.xxx.xx.xx port 64147: Permission denied Is there any suggesions? My environments are as follows: - Server: admin@kx:~ % uname -a FreeBSD kx.truefc.org 12.0-CURRENT FreeBSD 12.0-CURRENT #13 r308871M: Sun Nov 20 15:51:21 JST 2016 admin@kx.truefc.org:/usr/obj/usr/src/sys/XIJ amd64 admin@kx:~ % ssh -V OpenSSH_7.2p2, OpenSSL 1.0.2j-freebsd 26 Sep 2016 admin@kx:~ % - Client: kiri@kazu:~[995]% uname -a FreeBSD kazu.pis 9.2-STABLE FreeBSD 9.2-STABLE #5 r259404M: Mon Dec 16 00:12:52 JST 2013 admin@kazu.pis:/usr/obj/usr/src/sys/GENERIC amd64 kiri@kazu:~[996]% ssh -V OpenSSH_6.2p2, OpenSSL 0.9.8y 5 Feb 2013 kiri@kazu:~[997]% Best regards. [1] https://www.gentoo.org/support/news-items/2015-08-13-openssh-weak-keys.html [2] https://lists.freebsd.org/pipermail/freebsd-current/2016-August/062853.html --- KIRIYAMA Kazuhiko
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