I cannot connect to my GCP VM through ssh. It is not working either through terminal (which gives a timeout error) or through the browser (eternally loading)
With nmap, I found out that there is no ssh service provided on the external IP address of the machine
Host is up (0.076s latency).
Not shown: 998 filtered ports
PORT STATE SERVICE
80/tcp closed http
443/tcp closed https
However, I do have the default-allow-sshrule in my firewall.
My question is what I should do now to have this ssh access. Thanks in advance!
You can find in the official documentation :
Troubleshooting
SSH
Test connectivity:
Check your firewall rules,
Test the network connection,
Connect as a different user,
Debug the issue in the serial console
Inspect the VM instance without shutting it down
Use a startup script
Use your disk on a new instance
Related
I am setting up a Virtual Machine node.js server at Google Cloud Platform. I have set up SSH keys so that I can log into my VM. I can successfully log into my VM using SSH-in-browser and start my server.
I can't access my public IP address through Chrome. I get this message:
This site can’t provide a secure connection.
When I try to connect to the IP within SSH-in-browser, I get the following:
$ curl -vso /dev/null --connect-timeout 5 34.68.254.120:8080
* Trying 34.68.254.120:8080...
* connect to 34.68.254.120 port 8080 failed: Connection refused
* Failed to connect to 34.68.254.120 port 8080: Connection refused
* Closing connection 0
I'm new at this. Any ideas would be appreciated. Thanks!
Edit1: Some more details --
Linux VM
port 8080 ingress is open on the firewall
I'm using OSLogin (`enable-oslogin = TRUE' 'enable-oslogin-sk = FALSE')
I can successfully log into console with both SSH-in-Browser and PuTTY, and I can start my server on port 8080
In both, I get the error above when I try to connect to the IP address
EDIT:
Follow below steps to fix “This Site Can’t Provide a Secure Connection” Error :
This error typically indicates a problem with either your browser’s configuration or the SSL certificate on your site.
1) Your local environment doesn’t have an SSL certificate.
2) Outdated SSL caches in the browser : (This is one of the more popular causes. Web browsers store SSL certificates in a cache, much
like other data. This means they don’t have to verify the certificate
every time you visit a site, which speeds up browsing. However, if
your SSL certificate changes and the browser is still loading an
older, cached version, it can cause this error to pop up).
3) Incorrect time and date settings on your computer.
4) Rogue browser extensions.
5) Overzealous antivirus software.
6) An invalid or expired SSL certificate.
If your firewall rules prevent external access:
Check your firewall rules with the following command: gcloud compute firewall-rules list with this, you can review the VPC where
the VM instance was migrated; and if it has allowed the Ingress TCP:
22 Port.
If this firewall rule is missing, you can add the firewall rule in the GCP console -> VPC Networks ->select your VPC network _Click on
the firewall rules to double check that the tcp: 22 port is allowed.
If the issue still is ongoing after checking the firewall rules, you
can follow this guide to start troubleshooting SSH connection.
I am trying to login to a VM machine but unable to get in there as the below error pops up:
ERROR: (gcloud.beta.compute.start-iap-tunnel) Error while connecting [[Errno 1] Operation not permitted].
kex_exchange_identification: Connection closed by remote host
ERROR: (gcloud.beta.compute.ssh) [/usr/bin/ssh] exited with return code [255].
Command used to log in:
gcloud beta compute ssh --zone "us-east1-b" "user1#test" --project "my-test-project"
When I use the same command from a different machine then it allows me to login to the test VM.
I have been looking at possible solutions related to the firewall settings but unable to get success. Can anyone help here ?
I try to connect with an instance with the command that you post and worked for me when I use it from the cloud shell and from another instances. The error that is given to you could happen for different reason, which are:
The VM is booting up and sshd is not running yet. You can't connect to a VM before it is running.
To resolve this issue, wait until the VM has finished booting and try to connect again.
The firewall rule allowing SSH is missing or misconfigured. By default, Compute Engine VMs allow SSH access on port 22. If the default-allow-ssh rule is missing or misconfigured, you won't be able to connect to VMs.
To resolve this issue, Check your firewall rules and re-add or reconfigure default-allow-ssh.
sshd is running on a custom port. If you configured sshd to run on a port other than port 22, you won't be able to connect to your VM. To resolve this issue, create a custom firewall rule allowing tcp traffic on the port that your sshd is running on using the following command:
gcloud compute firewall-rules create FIREWALL_NAME --allow tcp:PORT_NUMBER
Your custom SSH firewall rule doesn't allow traffic from Google services. SSH connections from the Cloud Console are refused if custom firewall rules do not allow connections from Google's IP address range.
To solve this issue visit this link
The sshd daemon isn't running or isn't configured properly. The sshd daemon enables SSH connections. If it's misconfigured or not running, you can't connect to your VM. To resolve this issue, review the user guide for your operating system to ensure that your sshd_config is set up correctly.
My GPC Linux VM is working fine and one day naturally can't log in, even though it is still running,
I used the nomachine to login and got error "authentication failed, please try again."
when SSH:
Connection via Cloud Identity-Aware Proxy Failed
Code: 4003
Reason: failed to connect to backend
You may be able to connect without using the Cloud Identity-Aware Proxy.
I also try add:
#! /bin/bash
useradd -G sudo USERNAME
echo 'USERNAME:PASSWORD' | chpasswd
and
route add default gw <gateway ip> eth0
I created another virtual machine and its image, but after a day I couldn't connect
Ensure you have a firewall rule to allow Cloud Identity-Aware Proxy (IAP) to connect to port 22 on the instance. Full instructions can be found at [1].
[1] https://cloud.google.com/iap/docs/using-tcp-forwarding?authuser=0#create-firewall-rule
Cause:
When an instance does not have a public IP address, SSH in a Browser needs to forward the SSH connection through IAP. The error "failed to connect to backend" indicates that the IAP proxy service was unable to open a TCP connection to the instance.
This is most often due to the VPC firewall not having a rule which allows the proxy to connect to the instance. It coulld also be due to the OS firewall or other VM network connectivity issue.
I successfully created a Compute Engine VM instance, and installed MySQL on it using this guide:
https://cloud.google.com/solutions/setup-mysql
Now I want to connect to it from App Engine and from my home too if possible.
Using this guide: https://cloud.google.com/appengine/docs/standard/python/connecting-vpc
I created the connector, giving it the suggested 10.x.x.x/28 IP address.
In my app engine's app.yaml I inserted:
vpc_access_connector:
name: projects/xxxxxxxxxx/locations/europe-west3/conectors/xxxxxx
The VM instance shows an internal IP of 10.x.x.x and an external IP of 34.x.x.x
I am trying to connect from PHP using this line:
new mysqli($servername, $username, $password, $dbname, 3306, null);
but I get different errors.
When connecting to 34.x.x.x from my home:
mysqli::__construct(): (HY000/2002): No connection could be made because the target machine actively refused it.
(I even created a Firewall rule to allow all traffic from my home IP)
When connecting to10.x.x.x from app engine:
2002: Connection timed out
When connecting to 10.x.x.x from app engine:
2002: Connection refused
How can I make a connection?
My first guess is that the service inside the instance is not up and running, check if the service of MySQL is running and listening, you can try this by doing a nmap test vs. the public IP of your MySQL VM instance nmap 34.0.0.0. You should see something like this (if you are using the standard port):
PORT STATE SERVICE
22/tcp open ssh
80/tcp closed http
443/tcp closed https
3306/tcp open mysql
Remember that there are two firewalls you need to take care of on GCP, (VPC firewall & OS firewall). So if you are not able to see this port start the SQL service by connecting into your VM instance and typing sudo systemctl start mysql, now run again nmap 34.0.0.0 and you should see the service.
To connect from App Engine to MySQL on Compute Engine VM instance just follow this other guide .
To connect from your home It will be better for you to connect to the instance via SSH and then to access your database, or you can keep connecting by a VPN to access it with the internal IP address if you need to connect directly to the socket, just take care to avoid hitting the limitations or missing something like IAM roles and permission needed for this connection.
after running mlflow ui on command line
and clicking http://127.0.0.1:5000/
i get site cannot be reached
127.0.0.1 refused to connect.
I have already updated firewall rules on VPC network in GCP and on my local machine and activated the ports
This site can’t be reached127.0.0.1 refused to connect.
Try:
Checking the connection
Checking the proxy and the firewall
ERR_CONNECTION_REFUSED
You can connect to your MlFlow UI by using the IP address of your Google Cloud VM instead of 127.0.0.1, which is equal to localhost, meaning it is only available inside the Google Cloud VM.