After upgrading yesterday (VERSION="20200803"), I can no longer ssh into
a local machine. I'm assured that the problem is not with the remote
machine: not only have I not changed anything on it, but also I can
still ssh into it from a third machine as I always have. Here's an
attempt from the newly updatetd machine:
$ ssh -vv hostd
OpenSSH_8.3p1, OpenSSL 1.1.1g 21 Apr 2020
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 20: Applying options for *
debug2: resolving "hostd" port 22
debug2: ssh_connect_direct
debug1: Connecting to hostd [192.168.0.26] port 22.
debug1: Connection established.
debug1: identity file /home/zl1/.ssh/id_rsa type 0
debug1: identity file /home/zl1/.ssh/id_rsa-cert type -1
debug1: identity file /home/zl1/.ssh/id_dsa type -1
debug1: identity file /home/zl1/.ssh/id_dsa-cert type -1
debug1: identity file /home/zl1/.ssh/id_ecdsa type -1
debug1: identity file /home/zl1/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/zl1/.ssh/id_ecdsa_sk type -1
debug1: identity file /home/zl1/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /home/zl1/.ssh/id_ed25519 type -1
debug1: identity file /home/zl1/.ssh/id_ed25519-cert type -1
debug1: identity file /home/zl1/.ssh/id_ed25519_sk type -1
debug1: identity file /home/zl1/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /home/zl1/.ssh/id_xmss type -1
debug1: identity file /home/zl1/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.3
debug1: Remote protocol version 2.0, remote software version OpenSSH_4.3
debug1: match: OpenSSH_4.3 pat OpenSSH_2*,OpenSSH_3*,OpenSSH_4* compat
0x00000002
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to hostd:22 as 'zl1'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: local client KEXINIT proposal
debug2: KEX algorithms:
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:
ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,sk-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,sk-ecdsa-sha2-nistp256@openssh.com,ssh-ed25519,sk-ssh-ed25519@openssh.com,rsa-sha2-512,rsa-sha2-256,ssh-rsa
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(a)openssh.com,zlib
debug2: compression stoc: none,zlib(a)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:
diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: host key algorithms: ssh-rsa,ssh-dss
debug2: ciphers ctos:
aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc(a)lysator.liu.se
debug2: ciphers stoc:
aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc(a)lysator.liu.se
debug2: MACs ctos:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160(a)openssh.com,hmac-sha1-96,hmac-md5-96
debug2: MACs stoc:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160(a)openssh.com,hmac-sha1-96,hmac-md5-96
debug2: compression ctos: none,zlib(a)openssh.com
debug2: compression stoc: none,zlib(a)openssh.com
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: (no match)
Unable to negotiate with 192.168.1.44 port 22: no matching key exchange
method found. Their offer:
diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
Running "zypper up ssh" said "Nothing to do".
I also renamed my ~/.ssh directory on the upgraded machine and replaced
it with a copy of the entire ~/.ssh directory from the third (working)
machine on my lan. Still no joy. Can anyone tell me what's going on?
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