SSH / Telnet Software

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Telnet is an application layer protocol used on the Internet or local area networks to provide a bidirectional interactive text-oriented communication facility using a virtual terminal connection. SSH was designed as a replacement for Telnet and for unsecured remote shell protocols. The term telnet is also used to refer to the software that implements the client part of the protocol. SSH provides a secure channel over an unsecured network in a client-server architecture, connecting an SSH client application with an SSH server.

Open SSHD issue

I am running a Centos 7 linux server, i am runnin open ssh server, and client. I did a recent test to see if the ssh is working correctly, and what i found out was i could only using my internal IP address to access my server from my workstation. I tried to use the public static ip and i get a timed out error. I checked my ports 21,22, to make sure they are open through port forwarding through my wireless router. They check out to be open, I am using firewalld as a firewall, and i did notice that my selinux gave me an message basically asking me do i want the sshd server access to a particular file. I am not sure if selinux is the issue. But i want to find out if it is a permission problem, or selinux issue. The actual sshd server when checked on staus shows it is running fine. Please help
error2.PNG

4 Comments

We have a Linux server and after it was scanned for any security vulnerabilities, we got one about "SSH Weak Algorithms Supported". I tried to make a change to the ssh_config file under /etc/ssh/ to remove the support for any "arcfour" algorithm, but after another scan, it is still showing that this vulnerability exists. Can anyone tell me exactly what I need to change? This is my line in the ssh_config file:

Ciphers aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc

Thanks in advance!
- Christian

9 Comments

Question by

burnedfaceless

2018-06-08Solved

Changing SSH Keys

I removed the public SSH key from a server I was managing. THen I generated a new key and overwrote the old one on my laptop. THen I added the key to the server. it added two keys.

I thought it would be best practice to remove the old key and put the new one in. It seems like my old key is still being added to the server. Am I overthinking this?

Does it really not matter and should you not bother with changing SSH keys? I was going to change them by the business quarter.

4 Comments

LVL 1

Question by

Yashy

2018-06-07Solved

How to set up an SFTP server?

Hi guys

I'm trying to set up an SFTP server for our company to use. I have a Windows 2012 server and have started to go down the open ssh route etc.

Do you guys have any guides one could follow or recommendations you would make?

If people think Linux would be a better route, then I can go down that route too. I need something that will be stable and not lose/drop connectivity because of some sort of service that needs restarting all of the time etc.

And I have to do this within the next 3hrs:).

Thanks for helping
Yash

3 Comments

Would someone have an explanation for this?

Both times I have run this script.

vmkfstools -i "/vmfs/volumes/Date-2016/00 - DNS Server/00 - DNS Server.vmdk" -d thin "/vmfs/volumes/DES Lessons/00-DNS-Serve
r/00 - DNS Server.vmdk"

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It gets to around 45%, and then jumps to 100%

Destination disk format: VMFS thin-provisioned
Cloning disk '/vmfs/volumes/Date-2016/00 - DNS Server/00 - DNS Server.vmdk'...
Clone: 100% done.

However, the actual size is 50GB
But the file transferred is only 16GB

00 - DNS Server.vmdk
16.53 GB
Sunday, May 20, 2018, 12:48:59 -0400

This is the actual size

00 - DNS Server.vmdk
50 GB
Saturday, April 28, 2018, 08:23:53 -0400

I have 7 VMs that need to be moved to a new drive, and this is causing some major slowing down issues.
Any ideas?

Also, if using the vmkfstools GUI is a better route to go, that would complete this without this issue.
Then please, tell me how to use the GUI, as I cannot find any information on using it.

Carrzkiss

4 Comments

Hello All;

I have a 1TB drive of which has 11 VMs on it.
Taking up about 95% of the space.
I purchased some 500GB driver, I am in the process of moving the VMs over.

What I have done.
#1:
Using the datastore, I chose the VMs and I "Moved" them.
It is going to take a few days to move the ones I selected over, about 426GB.

#2: I tried the OpenSSH
Just to move one of the VMs over that is 60GB, will take over 24-hours.

Code for the SSH

[root@localhost:/vmfs/volumes/5b005dd5-2ce20e85-e704-001517fcd2e8] scp -r "00 - DNS Server" root@192.168.2.101:/vmfs/volumes/Date-2016/"00\\-\\DNS\\Server"

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How can I make this go faster?
It is only going from one drive to another drive, on the same server.

Thanks
Carrzkiss

19 Comments

I have a Dell laptop (running Windows 10) where I'm hosting OpenSuSE Linux (Leap 42.3) in a virtual machine. Although I can ping the virtual machine, I haven't been able to connect to it using the SSH protocol. As far as I can tell, the secure shell demon is running on the Linux system. I've tried a couple of SSH Windows clients – specifically, SecureCRT and SecureFX. Additionally, I've tried running the SSH client from the Windows command prompt. I haven't seen any error messages. Instead, the connection simply times out.

Networking is not my forte, but I'm familiar with SSH. I've configured it on UNIX systems many times, but that was years ago. These days I'm doing so only on rare occasions. Consequently, there's usually some small detail that I overlook. Any assistance would be greatly appreciated!

4 Comments

Question by

Michael Bracey

2018-04-23Solved

Can't connect to FTP server

Unable to access FTP server using local account created. Ftp server is 2003 and not using IIS, but OpenSSH.
User seems to have all the permissions needed to access through WinSCP, but I keep getting the access denied message when attempting to connect.
I'm not sure whether or not I did not add this user somewhere with permissions, whereas I am not an avid FTP server administrator.
Any help would be appreciated.

12 Comments

how can I ssh to a linux box and copy the key to the destination in one command

someone showed me this once it is l or ssh-L or somelike that

2 Comments

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Question by

Jasmin shahrzad

2018-02-27Solved

haproxy and secure ftp server.

how to use Haproxy to publish an internal SFTP server.

3 Comments

Question by

Jasmin shahrzad

2018-02-26Solved

ssh/sftp login

i have sftp install in ubuntu 16.04 hwo to disabled user to has a ssh login. user has only sftp login not ssh login.

5 Comments

Question by

Vignesh RS

2018-02-11

FTP Problem

I configured new FTP user in ubuntu linux . but connecting to FTP via Filezilla occured this error .
Received unexpected end-of-file from SFTP server Error: Could not connect to server

5 Comments

There is a security system scanner that needs to access a server to scan. If it states the below, what would be the command to allow? I've check sshd_config and thought allowed IPs would be in that config. But it seems I need a command and the system previous setup owner is gone at my current new job.

RHEL 7.4 Maipo

If you are running IP filters or IP wrappers you will need to permit the systems to access your system via Secure Shell (SSH) on port 22. The IP addresses for the systems are

1.2.3.4
2.3.4.5
and
2.5.6.7

These are just placeholder IP addresses.
What would be the command line only to add this?

2 Comments

Question by

credog

2018-02-07SolvedPrivate

Secure MySql/MariaDB Replication

We have a partner that has a MySQL / Maria DB Master server. We have a slave and want to replicate against their master. Some want to use the builtin SSL replication and others want to tunnel via SSH. Can anyone provide some recommendations or pros and cons of each. Any security, maintenance issues to consider? Also, I assume that since we would be replicating against their master, they would have to run with the ssh port listening, not our slave? Thanks

6 Comments

Hi all,

I've been trying to access our Cisco SG300 via URL and putty and no luck. The switch is fine and running. I've been wanting to go in and bring a port alive.

Earlier, for the first time in weeks the GUI loaded via URL on the browser so I tried to log on and it wasn't doing anything. Also tried HTTPS and nothing (GUI.PNG) also I exit browser and reload it says... Unable to connect, etc on most browsers(cisco_browsers.png)

I also tried console access with PUTTY.
SG300 -> male to male serial cable-> DB9 to USB cable. Device manager shows COM4 so I set that into putty.

Connect to: COM4
Speed: 115200 (have tried 9600)
Data Bits: 8
Stop Bits: 1
Parity: NONE
Flow Control: NONE

SSH and Telnet was also not working.

SSH- file attached (cisco_putty_ssh) ... "Disconnected: No supported authentication methods available (server sent: public key)

Telnet- file attached (cisco_putty_telnet) ... "Network error: Software caused connection abort"

I've completely rebooted my laptop and the SG300 switch as well.
GUI.PNG
cisco_putty_ssh.PNG
cisco_putty_telnet.PNG
cisco_browsers.PNG

13 Comments

Question by

Doreen Boyle

2018-01-19

SFTP won't use port 22

We use SFTP on our AS400 to Send data to a client on port 10022 (was set up a long time ago), and it works perfectly. We have a new client who wants us to SFTP using port 22, which is the default port. When we try to SFTP it tries to use port 10022. I looked and the SSH config file shows port 22. Why is SFTP getting port 10022 from, and more importantly how do we change it to use port 22 for this client?

OpenSSH_6.9p1, OpenSSL 1.0.2j 26 Sep 2016
debug1: Reading configuration data /QOpenSys/QIBM/ProdData/SC1/OpenSSH/etc/ssh_config
debug2: ssh_connect: needpriv 0
debug1: Connecting to eft-dev.safeliteABC.com [xxx.xxx.xxx.xxx] port 10022.
debug1: connect to address xxx.xxx.xxx.xxx port 10022: Connection refused
ssh: connect to host eft-dev.test.com port 10022: Connection refused
Connection closed

SSH / Telnet Software

7 Comments

Hey I am changing my SSH key.

How do I remove my old SSH key from my servers trusted keys.

2 Comments

LVL 1

Question by

leadtheway

2018-01-11Solved

3650 Radius Configuration

Have a new 3650 configured from scratch, I'm trying to get ssh/radius authentication setup. I went through a guide to setup on switch, I have several others that are working so i know the server is setup correctly, but when i try to use it on the switch, SSh works, and i can log in with local creds, but AD creds don't work. Thinking I'm missing something. was hoping someone could take a look over my config and see if anything stands out.. Thanks
3650_scrub.txt

11 Comments

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Question by

Jasmin shahrzad

2018-01-10Solved

ssh connection

i install ssh in ubuntu. i start services and it's runnig. idisabled firewall. i add keygen in authorized_keys.
ssh <ip_host> says Permission denied (publickey).

35 Comments

Hi There,

I had connected to Ubuntu machine in windows through putty's ssh client assume the IP address is

55.170.23.156

I want to clone bit bucket inside this putty

assume the bit bucket url

is http://bitbucket.librariesdsw.net:8080/

assume bit bucket user name is bharath and password is welcome

how to clone this bitbucket inside this putty

please help, thanks in advance

Kind regards,

Bharath K

2 Comments

LVL 11

Question by

Brandon Lyon

2018-01-02Solved

SSH VNC tunnel setup problems

I'm trying to follow this guide in order to setup an SSH tunnel for VNC onto an ubuntu desktop from a Windows desktop.

I can connect via SSH but the moment I start the VNC connection to localhost::5902 I immediately get the following message:

"Connection has been gracefully closed".

Any ideas what could be causing this? Is it a bad setting on the Ubuntu computer I'm trying to VNC into? Did I configure PuTTY or TightVNC wrong? Is it because I changed the default SSH port number? Is there something I need to do on my router other than port forward the ssh connection appropriately (which I already did)? Is there an alternate method you would suggest?

Ubuntu 16.04 LTS & Windows 10, both 64 bit.

14 Comments

I am not familiar with Linux but have configured a Linux appliance. The box is configured and I can log into it via console. I never use putty and tried to SSH into but get the following below. I know am able to authenticate via console, but not SSH. I was wondering if I need to enable something to allow remote access. If so, what commands must I put in to enable it? Please advise.

5 Comments

Question by

Xetroximyn

2017-12-07Solved

process keeps calling itself...

I have 1000+ of these - and it appears the parent process for each I have checked is the same command... not sure what is going on... any ideas?

8012     32605  0.0  0.0 110016  1264 ?        S    01:21   0:00 /bin/csh test -d /usr/lib64/qt-3.3
8012     32610  0.0  0.0 110016  1268 ?        S    01:22   0:00 /bin/csh test -d /usr/lib64/qt-3.3
8012     32611  0.0  0.0 110016  1268 ?        S    01:21   0:00 /bin/csh test -d /usr/lib64/qt-3.3
8012     32617  0.0  0.0 110016  1272 ?        S    01:21   0:00 /bin/csh test -d /usr/lib64/qt-3.3
8012     32618  0.0  0.0 110016  1264 ?        S    01:22   0:00 /bin/csh test -d /usr/lib64/qt-3.3
8012     32623  0.0  0.0 110016  1268 ?        S    01:21   0:00 /bin/csh test -d /usr/lib64/qt-3.3
8012     32625  0.0  0.0 110016  1268 ?        S    01:22   0:00 /bin/csh test -d /usr/lib64/qt-3.3
8012     32629  0.0  0.0 110016  1268 ?        S    01:21   0:00 /bin/csh test -d /usr/lib64/qt-3.3
8012     32632  0.0  0.0 110016  1268 ?        S    01:22   0:00 /bin/csh test -d /usr/lib64/qt-3.3
8012     32635  0.0  0.0 110016  1268 ?        S    01:21   0:00 /bin/csh test -d /usr/lib64/qt-3.3
8012     32639  0.0  0.0 110016  1272 ?        S    01:22   0:00 /bin/csh test -d /usr/lib64/qt-3.3
8012     32641  0.0  0.0 110016  1268 ?        S    01:21   0:00 /bin/csh test -d /usr/lib64/qt-3.3
8012     32646  0.0  0.0 110016  1272 ?        S    01:22   0:00 /bin/csh test -d /usr/lib64/qt-3.3
8012     32647  0.0  0.0 110016  1268 ?

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…

6 Comments

Question by

rmtogether

2017-12-05Solved

Configure Putty & Xming

Dear Experts,
I have spent so much time trying X11 forwarding but still no success. Can you help me with it?

I have the sudo privilege and my system is Ubuntu 17.10. I try the instruction like
http://laptops.eng.uci.edu/software-installation/using-linux/how-to-configure-xming-putty
But not work. here is my error

hsu@hcavfb11:~$ xclock
Error: Can't open display:
hsu@hcavfb11:~$

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8 Comments

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