Am 19.04.2020 um 14:31 schrieb Sharuzzaman Ahmat Raslan via Cygwin:
Hi.
New OpenSSH client will not connect to server that use SHA1.
Please refer to this: https://www.openssh.com/legacy.html
You should configure your old server to use more modern cipher
This isn't always a feasible approach. I access a WD MybookLive NAS
storage via ssh. It still works with current openssh (8.2) but I
wouldn't know how to find out the methods supported by my server and
wouldn't like to risk the adventure to upgrade such a device. Therefore
I'd suggest to configure in "legacy" methods in the cygwin openssh
package as mentioned under the link above, to avoid such trouble.
Thomas
Thank you
On Sun, 19 Apr 2020, 8:13 pm David Balažic via Cygwin, <cygwin@cygwin.com>
wrote:
Hi!
I tried to backup some files from my server with scp and failed:
$ scp -v root@the.server:/root/a.file .
Executing: program /usr/bin/ssh host the.server, user root, command
scp -v -f /root/a.file
OpenSSH_8.2p1, OpenSSL 1.1.1f 31 Mar 2020
debug1: Connecting to the.server [192.168.1.11] port 22.
debug1: Connection established.
debug1: identity file /home/stein/.ssh/id_rsa type -1
debug1: identity file /home/stein/.ssh/id_rsa-cert type -1
debug1: identity file /home/stein/.ssh/id_dsa type -1
debug1: identity file /home/stein/.ssh/id_dsa-cert type -1
debug1: identity file /home/stein/.ssh/id_ecdsa type -1
debug1: identity file /home/stein/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/stein/.ssh/id_ecdsa_sk type -1
debug1: identity file /home/stein/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /home/stein/.ssh/id_ed25519 type -1
debug1: identity file /home/stein/.ssh/id_ed25519-cert type -1
debug1: identity file /home/stein/.ssh/id_ed25519_sk type -1
debug1: identity file /home/stein/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /home/stein/.ssh/id_xmss type -1
debug1: identity file /home/stein/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.2
debug1: Remote protocol version 2.0, remote software version
dropbear_2011.54
debug1: no match: dropbear_2011.54
debug1: Authenticating to the.server:22 as 'root'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: (no match)
Unable to negotiate with 192.168.1.11 port 22: no matching key
exchange method found. Their offer:
diffie-hellman-group1-sha1,diffie-hellman-group14-sha1
I tried OpenSSH_8.0p1-2 which is still available in the cygwin
setup-x86_64.exe wizard and that version works fine.
(the version above is 8.2.p1-1 in the setup wizard)
Regards,
David
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