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-...@openssh.com none
debug1: kex: client->server aes128-ctr hmac-sha1-...@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-sessi...@openssh.com
debug1: Entering interactive session.
debug1: client_input_global_request: rtype hostkeys...@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

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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 <li...@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-...@openssh.com,ecdsa-sha2-nistp384-cert-...@openssh.com,ecdsa-sha2-nistp521-cert-...@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-...@openssh.com,ecdsa-sha2-nistp384-cert-...@openssh.com,ecdsa-sha2-nistp521-cert-...@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-rsa-cert-...@openssh.com,ssh-dss-cert-...@openssh.com,ssh-rsa-cert-...@openssh.com,ssh-dss-cert-...@openssh.com,ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: 
aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-...@openssh.com,aes256-...@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-...@lysator.liu.se
debug2: kex_parse_kexinit: 
aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-...@openssh.com,aes256-...@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-...@lysator.liu.se
debug2: kex_parse_kexinit: 
hmac-md5-...@openssh.com,hmac-sha1-...@openssh.com,umac-64-...@openssh.com,umac-128-...@openssh.com,hmac-sha2-256-...@openssh.com,hmac-sha2-512-...@openssh.com,hmac-ripemd160-...@openssh.com,hmac-sha1-96-...@openssh.com,hmac-md5-96-...@openssh.com,hmac-md5,hmac-sha1,umac...@openssh.com,umac-...@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd...@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: 
hmac-md5-...@openssh.com,hmac-sha1-...@openssh.com,umac-64-...@openssh.com,umac-128-...@openssh.com,hmac-sha2-256-...@openssh.com,hmac-sha2-512-...@openssh.com,hmac-ripemd160-...@openssh.com,hmac-sha1-96-...@openssh.com,hmac-md5-96-...@openssh.com,hmac-md5,hmac-sha1,umac...@openssh.com,umac-...@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd...@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,z...@openssh.com,zlib
debug2: kex_parse_kexinit: none,z...@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-sha...@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-poly1...@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-...@openssh.com,aes256-...@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc
debug2: kex_parse_kexinit: 
chacha20-poly1...@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-...@openssh.com,aes256-...@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc
debug2: kex_parse_kexinit: 
umac-64-...@openssh.com,umac-128-...@openssh.com,hmac-sha2-256-...@openssh.com,hmac-sha2-512-...@openssh.com,hmac-sha1-...@openssh.com,umac...@openssh.com,umac-...@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: kex_parse_kexinit: 
umac-64-...@openssh.com,umac-128-...@openssh.com,hmac-sha2-256-...@openssh.com,hmac-sha2-512-...@openssh.com,hmac-sha1-...@openssh.com,umac...@openssh.com,umac-...@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: kex_parse_kexinit: none,z...@openssh.com
debug2: kex_parse_kexinit: none,z...@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-...@openssh.com
debug1: kex: server->client aes128-ctr hmac-sha1-...@openssh.com none
debug2: mac_setup: found hmac-sha1-...@openssh.com
debug1: kex: client->server aes128-ctr hmac-sha1-...@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-sessi...@openssh.com
debug1: Entering interactive session.
debug1: client_input_global_request: rtype hostkeys...@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     ad...@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     ad...@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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