It's not a bug !
** Changed in: openssh (Ubuntu)
Status: Incomplete => Invalid
** Converted to question:
https://answers.launchpad.net/ubuntu/+source/openssh/+question/669164
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https://bugs.launchpad.net/bugs/1771359
Title:
No matching cipher found even if client and server have matching
cipher
Status in openssh package in Ubuntu:
Invalid
Bug description:
Since Bionic upgrade (from Artful) I encounter problem to call HP
switch with SSH.
After the upgrade, trying to ssh some switch give me this message :
$ ssh 192.168.0.1
Unable to negotiate with 192.168.0.1 port 22: no matching cipher found. Their
offer: aes128-cbc,3des-cbc,des-cbc
So, I look for supported cipher :
$ ssh -Q cipher
3des-cbc
aes128-cbc
aes192-cbc
aes256-cbc
rijndael-...@lysator.liu.se
aes128-ctr
aes192-ctr
aes256-ctr
aes128-...@openssh.com
aes256-...@openssh.com
chacha20-poly1...@openssh.com
I see that aes128-cbc seem both supported. So I try... :
$ ssh -c aes128-cbc 192.168.0.1
...and It's work !
Workaround :
I've added “ciphers aes128-cbc” to ~/.ssh/config file for each switch
I manage.
The ssh-client should detect automatically the good cipher ? No ?
Thank you for your attention.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: openssh-client 1:7.6p1-4
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: GNOME
Date: Tue May 15 15:39:00 2018
EcryptfsInUse: Yes
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=fr_FR.UTF-8
SHELL=/bin/bash
RelatedPackageVersions:
ssh-askpass N/A
libpam-ssh N/A
keychain N/A
ssh-askpass-gnome 1:7.6p1-4
SSHClientVersion: OpenSSH_7.6p1 Ubuntu-4, OpenSSL 1.0.2n 7 Dec 2017
SourcePackage: openssh
UpgradeStatus: Upgraded to bionic on 2018-04-24 (21 days ago)
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