Questions tagged [ssh]

Question 1

I'm unable to connect to one of my servers using ssh over IPv6. sshd is configured to listen on tcp/922. I found this in my server log: 2025-12-09T13:44:14.917279-05:00 myserver kernel: ip6tables ...

Question 2

I am currently configuring SSSD to authenticate Ubuntu 24.04 servers against Google Secure LDAP. I want users to be able to log in using SSH Keys for convenience. However, if I suspend/disable a user ...

Question 3

I am having an issue establishing a ssh connection to my docker container when the docker host is connected to a vpn (nordvpn). Here is what I have done : On my router : i have port forwarded an ssh ...

Question 4

On my server I have user ruslan and I manually created user git. I added to this user's .ssh/authorized_keys my public key. And I can connect via public key to user ruslan but can't to user git. ...

Question 5

We have a shared user account for administrative stuff. I want to use an env var to hold the initiant of the ssh session, so that the .bashrc can do user-dependent execution. I have tried -o SendEnv. ...

Question 6

I installed Debian 13 and lastlog2 to see when someone last logged in. Unfortunately, changes in Debian 13 mean that, unlike before, sftp logins are also included in the lastlog database. My goal is ...

Question 7

I’ve been running into a frustrating issue with SSH connections lately and could use some advice or insight. When I SSH into a few of our servers, the connection drops with an error like: ...

Question 8

I have a ssh server running (OpenSSH_9.9p2, OpenSSL 3.0.16 from freebsd, UseDNS set to no), but I sometimes randomly have issues logging in. As in, ssh doesn't even get to the auth state. What could ...

Question 9

I'm running smokeping on my gateway. For direct pings (started from the gateway itself) all graphs work fine. They contain data. Yet if I use the RemoteFPing probe, the graphs stay empty (I waited a ...

Question 10

I have a server with sshd running behind NAT(port forwarded via iptables through another server). All ssh connections from outside shown as connection from forwarding server IP. So fail2ban won't ...

Question 11

I have an issue with sshd and connection drops. I can successfully ssh from my laptop to my cloud server once. After disconnecting and reconnecting my ssh logins are dropped. The only way to make it ...

Question 12

I am trying to connect to a Windows Server using SSH in a python script. I am able to connect with my username and password, but connecting with an SSH key fails with: Check username, key file path, ...

Question 13

I have several Linux servers. Most are configured to only accept logins with SSH keys, but for some servers, I need to be able to log in with both key and user/pass. The problem is that users who use ...

Question 14

When using ChallengeResponseAuthentication, it is important to understand how it interacts with the Pluggable Authentication Modules (PAM) system and related configuration files. When ...

Question 15

I want to set up a local docker dev environment for ansible (semaphore ui container) and a dev docker container for testing tasks. To avoid storing the ssh key somewhere I thought I create a ...

Question 16

I have to to ssh connections (connected via ssh to two seperate servers) bind with option -D to port 1080 and 1081 on localhost. Now I want to make a chain so that the traffic first routes to port ...

Question 17

After enabling the STIGs, SSH keys have stopped working. You present the key and it still asks for a password. Things I've tried: Confirmed I'm using RSA with SHA2 which is accepted Confirmed that ...

Question 18

I have a user data script that changes the SSH port on an EC2 machine to 9000 to make way for a podman bastion container on port 22. This worked fine for several months, until today when it didn't. ...

Question 19

Just starting to work with ansible. I have a private ssh key on my local system, and a public ssh key in ~/.ssh/authorized_keys on the remote host. For test purposes, I have set the following ...

Question 20

ASCII representation of the workflow [Local Machine] | | SSH ProxyJump / ProxyCommand v ----------------- | Jump Host | <- Private key here | xxx | ------...

Question 21

I am developing an sftp client using blocking calls of libssh library. With libssh, there is an option to set connection timeout using SSH_OPTIONS_TIMEOUT. But documentations has no reference on how ...

Question 22

I have set up an EC2 instance and use SSH on port 22 with SSH key. And I'd like to know how this is done in a "professional" way. Is this the preferred way of gaining shell access to a ...

Question 23

I’m configuring a Linux server with OpenSSH and pam_google_authenticator.so for TOTP-based 2FA. I want to enforce different authentication paths based on the login method: If a user logs in using ...

Question 24

PyCharm supports remote development through ssh, which comes in very handy for me (training LLMs on GPU clusters). I've been using the feature for a long time, but now I need to use a Redhat server, ...

Question 25

I have a site on an older version of Debian (update pending for various reasons). To log in to the server on the command-line I needed to add rsa key options to my SSH "config" file: Host ...

Question 26

I am starting ssh/sftp in a container. sftp after getting authenticated is disconnecting. It stater only working when I pass --priveleged=true. podman run --privileged=true -dit -p 3333:3333 ...

Question 27

sftp client closing client after authentication . debug2: channel_input_open_confirmation: channel 0: callback done debug2: channel 0: open confirm rwindow 0 rmax 32768 debug3: send packet: type 1 ...

Question 28

How do I use rsnapshot to backup my local system to a network machine to which I can ssh via ssh me@backupmachine? I edited /etc/rsnapshot.conf but no luck: I tried to set snapshot_root me@...

Question 29

Zabbix 7.2 OS Oracle Linux 9.6 I have a legacy switch that is monitored by a Zabbix Proxy and has SSH items configured. However, the SSH items are unable to reach the host due to a mismatch in Kex ...

Question 30

I ssh into a running Docker container. This container has mounted home directory (/home/username) to an NFS partition, shared between several users of other similar containers. All these containers ...

Question 31

When SSH sessions are started, I need to log information that is in the environment passed to SSH, so I cannot do the logging during PAM. My basic script does not show PAM output (eg MOTD) which is ...

Question 32

I'm connecting from Windows 11 to Amazon Linux 2023 using SSH. I'm getting intermitted disconnections. I tried adding the following to the sshd_config: ClientAliveInterval 300 ClientAliveCountMax 3 ...

Question 33

I am trying to learn ansible locally by recreating server-node scenario using podman containers on basis of this article: https://naveenkumarjains.medium.com/ansible-setup-on-containers-4d3b3efc13ea ...

Question 34

I'm planning for a transfer over 3TB and I can't work my way with rsync rsync -av -e 'ssh -p 2222' [email protected]:/volume1/video/ ./ [email protected]'s password: Permission denied, please try again....

Question 35

I have a primary pfsense (192.168.139.1) and a second pfsense (192.168.139.90 on this interface) that has a LAN network behind it (192.168.100.1 on the other interface). My machines on the secondary ...

Question 36

(base) haohao@zhangjunhaodebijixingdiannao .ssh % sudo ssh [email protected] -v OpenSSH_9.9p1, LibreSSL 3.3.6 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: ...

Question 37

Question After installing SELinux on an AWS instance what should I set to allow SSH login? Version Ubuntu 24.04 LTS. Background I had a brand new, working AWS instance but after I installed SELinux ...

Question 38

I'm using the asterisk and sshd jails in jail.local. The asterisk-related banning works fine, but when I added the sshd jail, it seems to be having issues: it recognizes the ssh failures, and "...

Question 39

I am using an Ubuntu 24.04 server with OpenSSH. The /etc/ssh/sshd_config uses the following options: PermitRootLogin no PubkeyAuthentication yes PasswordAuthentication no KbdInteractiveAuthentication ...

Question 40

I'm facing a strange issue with sshd on my server. I have a custom SSH service running (custom-sshd.service) on a non-standard port. Every time I reboot or manually restart the service using: sudo ...

Question 41

on my Debian server, I noticed that I have this up-to-date process that takes a lot of memory, and I don't know what it does. So using top command I get this processes top - 10:45:46 up 4 days, 20:26, ...

Question 42

I have migrated an old Amazon Linux server running OpenSSH_7.4p1, OpenSSL 1.0.2k-fips to a new Ubuntu 24 LTS box running OpenSSH_9.6p1 Ubuntu-3ubuntu13.11, OpenSSL 3.0.13. As part of the migration I ...

Question 43

Summary of the issue I am experiencing a very long delay (~20–40 seconds) when opening a new SSH session or using sudo for the first time in a terminal on my Debian 11 system. Subsequent sudo commands ...

Question 44

Using Rocky 9.4, OpenSSH 8.7p1, I have an RSA keypair which is not accepted unless sshd is in debug mode. (Thankfully I have an old pair that works). I have unset SSH_AUTH_SOCK and verified that no ...

Question 45

I'm using the following command to test network speed to my.remote.server, from my workstation: dd if=/dev/random | pv | ssh my.remote.server "dd of=/dev/null" When I set en0 to 10Gb, ...

Question 46

I am on an Ubuntu 24.04.2 LTS client, and tried connecting to both a Debian 13 server and Linux Mint 22 server. I am using OpenSSH_9.6p1 Ubuntu-3ubuntu13.9, OpenSSL 3.0.13 30 Jan 2024 If I SSH with -...

Question 47

The situation: Debian12 host, apache2 httpd serving git CGI (located in /repos/git) for cloning repos. Repos are stored in /repos directory, and are owned by git user to enable ssh access to them (e.g....

Question 48

I have a server running haproxy for ssh with server lo-01 lo-01:22 check inter 10s fall 2 rise 1 and then on lo-01 every 10s I get the following auth.log entries: Apr 2 17:04:55 lo-01 sshd[...

Question 49

I want to use google authentication and have a special secret path in the PAM module for user groups. I'm probably missing something like: If the user is in groupx, use alternative OTP file path. I ...

Question 50

I am working on a project involving Microstack (OpenStack) where I am testing it on Oracle VM. I successfully created an instance, but I am encountering an issue: the instance prompts me for a ...