All Questions
29
questions
1
vote
0
answers
2k
views
Can we install OpenSSH 8.4 on ubuntu 16.04 or does it cause compatibility issues? CVE-2020-14145 CVE-2020-15778
We received OpenSSH Information Disclosure Vulnerability CVE-2020-14145 CVE-2020-15778 on some of our ubuntu 16.04 and ubuntu 18.04 Servers and the fix recommended is to upgrade to OpenSSH 8.4/8.4P1
...
- 21
1
vote
0
answers
134
views
Ubuntu - Moduli file upgrade story
SSH uses /etc/ssh/moduli file for DH exchange key alogithm. Only root has write permissions to modify the /etc/ssh/moduli file.
Assume that we modify the /etc/ssh/moduli file for some reason (Ex - ...
- 11
1
vote
1
answer
945
views
SSH - Permission denied (publickey) with Password Authentication
I'm not able to log into my remote machine and get the Permission denied (publickey). even through I manually specify the options to use password authentication ssh -o PubkeyAuthentication=no -o ...
- 111
1
vote
1
answer
692
views
Unable to install openssh-server on ubuntu 16.04 in Docker
I have a Docker container with a brand new install of Ubuntu 16.04, I'm unable to install openssh-server successfully. I'm able to install openssh-client successfully but when attempting apt-get ...
- 111
1
vote
0
answers
25
views
SSH working locally but not remotely [duplicate]
I have already opened a SSH session on my PC and it worked perfectly with my laptop when connected to the same network. But now, when I'm at a different location, I can't connect.
I've already tried ...
- 11
0
votes
0
answers
825
views
SSH connects successfully then disconnects when typing any key
When I connect from my laptop I am able to connect successfully and if I do not type anything the connection stays open. However, any keystroke results in the connection being broken with the message ...
- 223
-1
votes
1
answer
2k
views
Does Ubuntu 16.04.4 LTS include an SSH server by default? [duplicate]
According to this answer, SSH is disabled by default. However, looking around at tutorials, there were plenty of examples of installing an SSH server (e.g. sudo apt install openssh-server), which I ...
- 178
1
vote
1
answer
3k
views
Ubuntu 16.04 Server Permission denied(publickey,password). via ssh connection
Can I not connect ssh connection my server ,i searched all question and tried, but not working.
I re-establish the openssh-server, change sshd_config file and change my root password.
...
- 21
12
votes
1
answer
45k
views
Enabling and disabling sshd at boot via systemd
I have openssh-server installed but I'd like to sometimes leave the sshd service off by default at boot, and only start it from the terminal as needed.
Based on the the advice of many other questions,...
- 656
7
votes
2
answers
5k
views
What's the easiest way to install OpenSSH 7.4 on Ubuntu 16.04?
On Ubuntu 16.04 (Xenial) box, what is the easiest way to install OpenSSH (openssh-client) that is higher than 7.2?
I am aware that I could compile from source, but I was wondering if there's a way to ...
- 171
2
votes
1
answer
34k
views
error while loading shared libraries: libssl.so.1.1 (and libcrypto.so.1.1)
As you can see I'm missing libcrypto and libssl files. I locked out myself from my server after running apt-update and apt-upgrade, I'm running this from web console, because ssh nor any other program ...
- 227
1
vote
1
answer
708
views
Limiting access per SSH to specific accounts to LAN/specifc IPs? [duplicate]
in my quest to create a public user with almost no rights and an administrator user that can only accessed by me, I'd like to know if it is possible to limit SSH access to said administrator user to ...
1
vote
1
answer
446
views
SSH connection using key works only with -i command line
I'm trying to use the .ssh/config file to use identityFile I'm sure the syntax of the file is 100% correct as it only contain two lines.
host *
IdentityFile /path/to/private/key
I tried -vvv and I ...
- 163
1
vote
0
answers
1k
views
Connecting via Putty to Ubuntu Server 16.04
I have Windows 8.1 on my PC and I try to connect via Putty to Ubuntu Server 16.04 set on VMware. I can ping each other and both got Internet connection but I still cannot connect to my Ubuntu by ssh ...
- 13
3
votes
0
answers
3k
views
Cannot SSH locally from Mac to Ubuntu 16.04 Server (running as Hyper-v guest on Server 2012R2)
I've looked just about everywhere for a solution but I have yet to find one.
Here's my problem:
I try and connect to my Ubuntu Server via SSH from my Macbook Pro within my LAN with:
ssh nextcloud@192....
- 31
32
votes
4
answers
181k
views
Start SSH automatically on boot
Completely brand new to linux and Ubnuntu. Setting up a machine to do deep learning/neural networks. So far it is going well. Got everything installed and running. I want to be able to ssh from my Mac ...
- 455
5
votes
2
answers
30k
views
Algorithm Negotiation failed when trying to connect to server
I installed openssh-server in Ubuntu server 16.04 and in /etc/ssh/ssh_config I added:
MaxAuthTries 3
PasswordAuthentication YES
and then restarted the ssh server. When I try to connect from a a ...
- 731
5
votes
0
answers
741
views
Ubuntu 16.04 slow ssh character feedback
I am seeing veeeeeerry slow feedback on remote ssh terminals to a new install of Ubuntu 16.04. E.g., after typing a character it may take 20-30 seconds before it is displayed in the terminal. ...
- 51
2
votes
2
answers
2k
views
SSH key-based auth asks for password on first login [duplicate]
I have a fresh Ubuntu 16.04.1 LTS system and have noticed that key-based SSH authentication asks for the account's password the first time I login to the machine and subsequent SSH attempts work ...
- 401
2
votes
1
answer
654
views
Ubuntu 16.04 SSH RSA Keys work but only if password authentication is enabled (Putty)
I have keys setup on my Linux headless server and Putty on my Windows Desktop.
I can connect and authenticate successfully with Putty and authentication is via RSA Keys.
However, if I disable ...
1
vote
2
answers
792
views
Second ssh instance won't start after upgrade to Xenial Xerus - Permission denied
I've configured a second instance of my ssh-server.
"ssh" will listen to port 22 but only allows private/public key login (via phabricator).
"ssh2" will listen to port 266 with default sshd_config ...
- 21
-1
votes
1
answer
2k
views
I can SSH to my Ubuntu 16.04 server from a wired connection, but not from WiFi on the same network
I am working of a fresh install and new hard drive of Ubuntu Server 16.04. Everything has gone well and after setting a static IP, i installed SSH Server. It is up and running and I can SSH from my ...
0
votes
1
answer
2k
views
diffie-hellman-group-exchange-sha256 not work with all software after upgrating to 16.04 - OpenSSH_7.2p2
I have upgraded 2 computer with Ubuntu 14.04LTS to 16.04LTS and I have a problem with openssh.
With software like Putty 0.64 and less for example I can't establiseh a conexion with diffie-hellman-...
- 26
14
votes
7
answers
76k
views
libcrypto.so.1.0.0: no version information available (required by ssh)
I get the following error:
jalal@klein:~$ ssh -i "hyunwoo_key.pem" [email protected]
ssh: /home/jalal/computer_vision/MCR/v901/bin/glnxa64/libcrypto.so.1.0.0: no version ...
- 4,605
1
vote
0
answers
97
views
Issues with permissions when using ssh
I have been having some issues connecting via ssh between two computers. Let us call them Desktop and Laptop. Both are running Ubuntu 16.04 with a fresh install and with all updates applied. When ...
- 1,582
1
vote
2
answers
7k
views
How to use rsync when root priviledges are needed on remote host?
Since root passwords and logins are not allowed on Ubuntu, how does one use ssh and rsync to move folders and files from a local host to a remote host when root privileges are needed on the remote?
- 11
1
vote
1
answer
388
views
Does ssh service stop on reboot?
When I reboot a VM (Ubuntu 16.04) of mine, I'm no longer able to ssh to it. From what I understand, 'apt-get install openssh' gives you sshservice on startup by default so I'm guessing this isn't the ...
- 111
3
votes
0
answers
3k
views
SSH Connection to Ubuntu Server fails with Connection closed <ip> [preauth]
Newly installed Ubuntu Server 16.04, have done the update and upgrades.
Running sudo service ssh status says it is up and running. I marked OpenSSH-server during the installation.
But I cannot ...
- 226
1
vote
2
answers
5k
views
OpenSSH : Putty won't work with Ubuntu server 16.04
We use Putty to access our Linux servers from our windows workstations...
Today we created new servers with Ubuntu server 16.04 and installed openssh with tasksel (as allways).
When we try to ...
- 91