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SSH / Telnet Software

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.

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Hey I am changing my SSH key.

How do I remove my old SSH key from my servers trusted keys.
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hello experts
i am using powershell to start up plink.exe ssh to my network device and promote some commands, see below please.
$Plink = (${env:ProgramFiles} + "\PuTTy\plink.exe")
$commands = "d:\commands.txt"
& $Plink 192.168.18.2 -l admin -pw ******** -m $commands

and below is the content of commands.txt
conf t
int gig 0/0
shu

but i can't get it works, if you put only one command in the txt file or without -m parameter with only one command, it works, could you help me fix it and let me know what is the correct command text file format should be?

thank you
0
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
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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).
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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
0
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.
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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.

2017-12-13_8-17-22.png
2017-12-13_8-20-44.png
2017-12-13_8-21-27.png
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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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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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0
We have an SFTP setup and have a client that wants to know what protocols/hashing algos/encryption we allow.  I found this info, I'm not sure if this is good... should any of these be disabled?  Any insight would be helpful.

Thanks!

[root@clientsftp ~]# ssh -Q cipher
3des-cbc
blowfish-cbc
cast128-cbc
arcfour
arcfour128
arcfour256
aes128-cbc
aes192-cbc
aes256-cbc
rijndael-cbc@lysator.liu.se
aes128-ctr
aes192-ctr
aes256-ctr
aes128-gcm@openssh.com
aes256-gcm@openssh.com
chacha20-poly1305@openssh.com
[root@clientsftp ~]# ssh -Q mac
hmac-sha1
hmac-sha1-96
hmac-sha2-256
hmac-sha2-512
hmac-md5
hmac-md5-96
hmac-ripemd160
hmac-ripemd160@openssh.com
umac-64@openssh.com
umac-128@openssh.com
hmac-sha1-etm@openssh.com
hmac-sha1-96-etm@openssh.com
hmac-sha2-256-etm@openssh.com
hmac-sha2-512-etm@openssh.com
hmac-md5-etm@openssh.com
hmac-md5-96-etm@openssh.com
hmac-ripemd160-etm@openssh.com
umac-64-etm@openssh.com
umac-128-etm@openssh.com
[root@clientsftp ~]# ssh -Q kex
diffie-hellman-group1-sha1
diffie-hellman-group14-sha1
diffie-hellman-group14-sha256
diffie-hellman-group16-sha512
diffie-hellman-group18-sha512
diffie-hellman-group-exchange-sha1
diffie-hellman-group-exchange-sha256
ecdh-sha2-nistp256
ecdh-sha2-nistp384
ecdh-sha2-nistp521
curve25519-sha256
curve25519-sha256@libssh.org
gss-gex-sha1-
gss-group1-sha1-
gss-group14-sha1-

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0
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How can I tell if SSH and cypto key is enabled on cisco when I do show run ?
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I have tunneled mixed linux and windows clients to a 'within-firewall client' (that could access the share's host) before, so I know that that, at least, is possible.

But what about tunneling directly from the client to the host of the network share?

Can I have samba listen on port, say, 5559 (just an example), and only accept connections from localhost, and tunnel a client's 5559 to that host - so that the client appears to be connecting from host's localhost? I can't figure out how to set it up. So far, I have samba configured:

hosts allow = 127.0.0.1 ::1 lo
interfaces = lo 127.0.0.1
bind interfaces only = yes
And I'm tunneling from the host:

ssh -R 5559:localhost:5559 shrusr@shrhost -Nf
However, if samba is already running, than TCP forwarding fails. If the tunnel is already running, than samba cannot start. Is what I'm trying to accomplish possible? Is there some other way to do it?

It seems like it should work - I can even netcat myself files across that ssh tunnel. So, netcat has no problem listening to the same port as ssh. Only smbd refuses, and also blocks ssh from that port if started first.

Any advice would be appreciated.
0
Hi,

I am currently researching techniques used to exfiltrate data, such as ICMP tunneling, SSH tunneling and DNS tunneling. I have come across the word "covert channels" but am not sure if this refers to the tunneling techniques I have mentioned. Can someone explain what the exfiltration techniques through tunneling are called? i am asking to try narrow down my research keywords. Not sure if they fall under covert channels.

Thanks in advance for your assistance
0
Issue:
Python Script will not run because sshtunnel import to Python 3 does not seem import properly to the Pi.
I am thinking we are using the wrong version of ssh module python script for the Pi but I am struggling.  

 Hardware :
Raspberry Pi 3 Model B -  V 1.2  2015

OS Software :
pi@raspberrypi:~ $ cat /etc/*-release
PRETTY_NAME="Raspbian GNU/Linux 8 (jessie)"
NAME="Raspbian GNU/Linux"
VERSION_ID="8"
VERSION="8 (jessie)"
ID=raspbian
ID_LIKE=debian

Script:
import sshtunnel #import SSHTunnelForwarder
import mysql.connector

ID_String_Last = ["0"]

sshtunnel.SSH_TIMEOUT = 5.0
sshtunnel.TUNNEL_TIMEOUT = 5.0

with sshtunnel.SSHTunnelForwarder(
    ('**********this is the host in here **********'),
    ssh_username='', ssh_password='**********************',
    remote_bind_address=('127.0.0.1,', 3306)
) as tunnel:
    connection = mysql.connector.connect(
        user='*********username**********', password='*****************',
        host='127.0.0.1', port=tunnel.local_bind_port,
        database='northgm7_489.log_1001',
    )


Output:
Python 3.4.2 (/usr/bin/python3)
>>> %Run '17-10- 15 V6.1 Pi mySQL to Ash server.py'
Traceback (most recent call last):
  File "/home/pi/Desktop/17-10- 15 V6.1 Pi mySQL to Ash server.py", line 3, in <module>
    import sshtunnel #import SSHTunnelForwarder
ImportError: No module named 'sshtunnel'


Question:
Does anybody know what version of module is required for this platform so that it …
0
We have a vendor who has put his linux based appliance behind a firewall. If I ssh to the system from the same subnet as the linux appliance ssh succeed - giving me a login prompt and then succeeding with authentication. If I login to the linux appliance from the Outside of the firewall the conversation succeeds apparently - I get a login prompt. But when I enter the same credentials the connection is promptly terminated. If I look at the firewall I see only the allowed SSH session and no other denies to the server.
Any idea what might be going on? What logging could be looked at on the linux appliance to give us insight as to why the ssh connection is failing in the second case? Thank you
0
like a full clone in VMWARE , is there a way to do this?


thanks
0
I am having this issue that I have ( I think ) trased to an AMAZON ami that has changed and does not allow SSH anymore

can I access an older version of an AMI ????


CentOS Linux 7 x86_64 HVM EBS 1602-b7ee8a69-ee97-4a49-9e68-afaee216db2e-ami-d7e1d2bd.3 (ami-6d1c2007)

west coast AMI

(cannot SSh)


CentOS Linux 7 x86_64 HVM EBS 1602-b7ee8a69-ee97-4a49-9e68-afaee216db2e-ami-d7e1d2bd.3 (ami-af4333cf)
0
I have identical configs for the east and west coast , I have launched 30 or so of centos images , PPK,PEMs all in place all was working .

I added Centos AMI's to the US_WEST and cannot SSH into them"connection Refused" now I go back to the US-EAST and cannot SSH into them at all , all ports are open the security settings are all the same .


is there a limit to how many instances we can ssh into or something I am baffled about this ?

please help this is a production type issue ( giving a class )


how can I get more logs on the "connection refused" error


thanks
0
Hello,

I am new to ssh proxy command, we are trying to connect to the remote server and it is closing after this.

penSSH_7.4p1, OpenSSL 1.0.2k-fips  26 Jan 2017
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 58: Applying options for *
debug1: Executing proxy command: exec ssh -q -W mokkan3:22   mokkan2
debug1: permanently_set_uid: 0/0

I  need to go to server mokkan1 to mokkan3 using mokkan2 as  proxy server,
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Hi,

Hi, I'm using Copssh 5.0.0.9 version and it's works fine so far. i face an issue like "error: Received disconnect from
x.x.x.x: 14: No supported authentication methods available [preauth]". (Note: This is from Copssh Events log)

When i try to pull from files from server using TortoiseGit.

"Disconnected: No supported authentication methods (serversent: keyboard-interactive)"

Could you please help me, to solve this?

Thanks in advance
0
Hi Experts,

1. In what kind of environment , would we need to manage SSH keys?  
   Is it when we have multiple users sshing into any network device/Servers ?

2. Is there any software , that can be used to centrally deploy  different SSL certificates , and manage them (as in inform the admins about the date of expiry , etc.)


Thanks,
T
0
Hello Experts,

We are remediating security vulnerabilities.  I have several Ricoh MP 401SPF printers in our environment.  One of the vulnerabilities found was open TELNET.  I want to enable SSH and disable telnet.  I go into the printer interface and setup SSH as follows:

Ricoh1.png---Paint.png
When I try to SSH into the printer, I get the following error:

Ricoh2.png
When I look at the logs, I'm not seeing much that will help me.  Here are the logs:

Ricoh3.png
I've googled the error and have not come up with much.  I've deleted the key and recreated it.  I've also tried different clients.

Does anyone have any ideas?

Thanks,
Nick
0
Is there a simple and easy way to uninstall Drivers attached to Com ports?

My putty keeps crashing. Probably because I've installed several different serial to USB cables on my laptop
0
Hi,
How to identify the reason of problem below?
Status:	Connecting to 160.96.17.69...
Response:	fzSftp started, protocol_version=8
Command:	open "pzim_ftpuser1@160.96.17.69" 22
Error:	Connection timed out after 20 seconds of inactivity
Error:	Could not connect to server
Status:	Waiting to retry...
Status:	Connecting to 160.96.17.69...
Response:	fzSftp started, protocol_version=8
Command:	open "pzim_ftpuser1@160.96.17.69" 22
Error:	Connection timed out after 20 seconds of inactivity
Error:	Could not connect to server

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0
I am running ubuntu 14.04.4 LTS \n \l  on a virutal machine.

Up until about 1 hour ago, I was able to SSH into my linux box just fine internally, in my network.
I did a sudo ufw disable, sudo reboot and then i just enabled back the firewall, sudo ufw enable, did a reboot,
and now I can't SSH into the server.

Any idea's what I have to do to fix the issue and allow the linux box to accept SSH?

I can get into it via the console.
0

SSH / Telnet Software

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.

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