When connecting to the Malina at the local address, everything works fine, but when connecting from outside writes:
Unable to negotiate with 46.250.28.77 port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1,diffie-hellman-group14-sha1
Already tried everything. Can you help me?
enter image description here
Try this Command:
ssh -oKexAlgorithms=diffie-hellman-group1-sha1 -c aes128-cbc root#[YourIP]
And maybe censor your IP. Even if its not open to the world. :)
Related
i have a JupyterLab-Engine and I want to connect the terminal via SSH to the engine.
DataSpell asks for the host, the password and the port.
For some reasons it does not work. Do you know which part of the link is the host as well as which port is meant?
The link is:
jupyter.(machinename).(universityurl)
I'm a beginner in this sort of thing so I could use a bit of help.
I'm usually able to ssh into my school's local cluster using the following command in Ubuntu 18.05 LTS
ssh username#hostname.com
Now this only works when I'm connected to my school's wifi. Whenever I'm off of it, I receive the following error.
ssh: connect to host hostname.com port 22: Resource temporarily unavailable
After some online digging, I figured I needed to port forward into the server, so I tried putting -L 22:localhost:22 after ssh, but it gave me the following error:
Privileged ports can only be forwarded by root.
If I put sudo before everything, it gives me the same port 22 error from before. I'm terribly lost and any help would be appreciated.
I have searched and I know people have asked this before, but I have been through all settings and double, triple checked everything but I can't get it to work for the life of me. I have not this before with other machines, but I don't know why this isn't working.
*note: numbers have been changed for security reasons
Here is what I have:
Client
Raspberry Pi 3 with IP: 192.168.0.133
manual port in raspberry pi 3 sshd_config file: 1502
Router:
NAT Virtual Server:
External port: 1502
Internal port: 22
IP address: 192.168.0.133
DNS(duckdns.org)
- checked to make sure public IP address points to the domain: testing2#duckdns.org
ssh command that works on client:
ssh -p 1502 client#192.168.0.133
ssh command that doesn't work
ssh -p 1502 client#testing2.duckdns.org
So I'm not sure where it's going on. here is output from ssh -v -p 1502 client#testing2.duckdns.org
OpenSSH_7.4p1, LibreSSL 2.5.0
debug1: Reading configuration data /Users/testing/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Connecting to testing2.duckdns.org [188.45.22.61] port 1502.
debug1: connect to address 188.45.22.61 port 1502: Connection refused
ssh: connect to host testing2.duckdns.org port 1502: Connection refused
Any ideas? I really would appreciate any insights.
EDIT: To add some more clarifying information:
When I run the second command listed above, that is failing:
ssh -p 1502 client#testing2.duckdns.org
This goes out to the DNS I have setup (testing2.duckdns.org) and that DNS points to my network's public facing IP address. At that point, it hits the NAT routing rule I have setup on my router that forwards any requests from port 1502 to the internal port of 22 to the IP address of 192.168.0.133.
This is why I don't understand where it is failing, all the rules are there and the route should be open. Is there a setting on the raspberry pi (within the config file) that I'm missing?
So I figured out what was going on, and although I am still not able to connect remotely, I have solved what the original question posed.
The problem was I had changed the port on the raspberry pi (the internal port) to 1502. This meant that the route was forwarding correctly (from external of 1502 to internal of 22) but then the internal port was set to 1502, so it failed to connect.
This also explains why it would connect locally with the above command because the local port was 1502.
I still can't connect remotely because the raspberry pi is running a VPN and this is causing the SSH request to timeout, but that is a separate question.
Thanks for the help everyone!
I'm trying to log with ssh on my EC2 instance with a new dual-booted ubuntu 16.04. It's the first time i'm logging in with this client, so there is nothing in .ssh/known_hosts to be deleted, as it is suggested in many other posts like this one.
When I run :
ssh -i "my_key.pem" ubuntu#servername.amazonaws.com
I get:
The authenticity of host 'servername.amazonaws.com (serverip)' can't be established.
ECDSA key fingerprint is SHA256:***************************.
Are you sure you want to continue connecting (yes/no)?
Host key verification failed.
Since i can log with the exac same key from putty on my windows computer,and also from a mac with the same key, this doesnt seem to be key-related.
Anyone out there to help? Thanks in advance!
EDIT: i installed putty on linux, since it was working on windows. Doesnt work either.
nmap localhost gives me port 22 open.
nmap my.ip doesnt.
I tried to ssh to another address, and same results on ssh and putty :(
EDIT2: not a duplicate of BitBucket: Host key authentication failed
Problem solved: it was just me who only pressed Enter on "Are you sure you want to continue connecting (yes/no)?" and not typing yes. Thanks #Kenster
If you do not get any option to continue to connect and it fails permanently, then you could use the command with StrictHostKeyChecking=no option like following :
ssh -i "my_key.pem" ubuntu#servername.amazonaws.com -o StrictHostKeyChecking=no
I am trying to setup a Hadoop cluster but i am unable to access the slave machine using ssh, though i am able to ssh to the localhost.i have tried the passphraseless method.i am totally new to Hadoop and haven't used ssh before so not able to figure out my mistake.
Whenever i issue ssh for the client it asks me to enter the client machine's password.but as soon as i give the password i get the following line on the terminal -
"Permission denied, please try again"
Also when i try to copy the public key from the master to the slave i get the same message.
Need some help badly...
I had the same issue.
Please check if ssh server is running or not? If yes, open /etc/ssh/ssh_config and /etc/ssh/sshd_config file. Issue is server is running on different port and client is pointing to different port. Before this please ensure that openssh-server and client are installed.
Vivek