Ssh_exchange_identification Read Connection Reset By Peer

1. Ssh_exchange_identification Read Connection Reset By Peer Aws
2. Ssh_exchange_identification Read Connection Reset By Peer Video
3. Ssh_exchange_identification Read Connection Reset By Peer 2
4. Ssh_exchange_identification Read Connection Reset By Peer Software
5. Ssh Exchange Identification Error

Find answers to sshexchangeidentification: read: Connection reset by peer & Connection Refused from the expert community at Experts Exchange. Ssh: connect to host. port 22: Connection refused Or: ssh: connect to host. port 22: Operation timed out Or: sshexchangeidentification: read: Connection reset by peer Or: REMOTE HOST IDENTIFICATION HAS CHANGED Or: WARNING: UNPROTECTED PRIVATE KEY FILE! In SSH tunneling, apart from the errors above, you might see errors like these.

Introduction

SSH (Secure Shell) access is an essential tool for performing server maintenance and administration tasks. Most of the pages in our documentation and support platforms require the user to access the server through SSH at some point. One of the most common use cases is to remove the Bitnami banner, which requires SSH access.

For security reasons, Bitnami configures most of our cloud instances to allow only certificate-based authentication. In most clouds, the user must connect using bitnami as the username, as explained in this guide.

You are running into an SSH issue when you can't access your server via this protocol. This section also includes similar issues with SFTP (Secure File Transfer Protocol) access.

Another common operation is to create SSH tunnels. For security reasons, we configure some sensitive services to be only internally accessible (i.e. they accept requests only in the localhost - 127.0.0.1). Examples of these services are the following:

• phpMyAdmin
• phpPgAdmin

The only way to access these services from your local machine is by using SSH Tunnels. This guide also cover this kind of issues.

In this how-to guide, you will learn how Bitnami configures SSH access, what the common issues are, and how to those issues.

How to detect

You have an SSH issue when you can't access your server using this protocol. You will see error messages like the following:

Or:

Or:

Or:

Or:

Or:

In SSH tunneling, apart from the errors above, you might see errors like these:

Ssh_exchange_identification Read Connection Reset By Peer Aws

Common issues

These are the most common SSH issues that Bitnami users face:

• Wrong client configuration: A common mistake is to configure the SSH/SFTP client (SSH, PuTTY, Filezilla…) without setting all the necessary parameters correctly, such as host, port, username or private key. Another frequent problem occurs when you use a non-supported certificate, by trying to add a .pem keyfile in PuTTY instead of a .ppk keyfile, for example. This guide includes information on how to convert between keyfile formats.
• Cloud firewall: Most cloud instances come with port 22 open by default. Some users change that configuration incorrectly, resulting it SSH being blocked.
• No key-pair: If you don't use Bitnami Launchpad or Bitnami Cloud Hosting, you can create an instance without a key-pair, making SSH access impossible in most cloud platforms. Alternatively, you might have lost the SSH key-pair used to created the instance.
• SSH server: Some users change the instance SSH server's configuration (like adding a new authorized key) and accidentally break it. This is complex to fix as it's very difficult to recover access without creating a new instance.
• SSH tunnel: Issues here might include SSH client misconfigurations or server-side redirections that render the tunnel useless.
• SSH in OVA virtual machines: Our local virtual machines (ova and vmdk format) have the SSH server disabled by default, so some users encounter problems when enabling it following this guide.

Troubleshooting checklist

Note: To access the server in 1&1 and Centurylink you don't need a key-pair. Use the username and password instead. Check how to obtain your SSH credentials in 1&1 and Centurylink.

Ssh_exchange_identification Read Connection Reset By Peer Video

Is the SSH Client configured correctly?

Some SSH issues occur because of a missing parameter in the connection settings. If you get an error like this:

Make sure you have the following parameters set:

• IP address of the server. Check that the IP address hasn't changed by referring to your cloud provider control panel.
• Username. Bitnami instances come with the user bitnami.
• Key-pair used to create the instance.

Review the SSH connection section for information about how to configure the most popular SSH clients. If you're trying to create an SSH tunnel, you need to follow this guide.

Was the instance created with an SSH key-pair?

In most cloud platforms, if the server wasn't created using Bitnami Launchpad or Bitnami Cloud Hosting, you'll need to explicitly specify a key-pair when creating the instance. If no key-pair was specified, then you will not be able to gain access through SSH. If you want to maintain the changes already made in your instance, follow these steps:

• Create a snapshot of your current instance using your cloud provider control panel.
• Create a new instance using this snapshot, making sure that you select an SSH key-pair.

Now you have a new instance that you can access through SSH.

Can't you find the SSH key-pair used to create the instance?

If you don't have the key-pair the instance was created with, you will not able to connect through SSH. If you want to maintain your instance data, follow the steps described in this section.

Is port 22 open in the instance?

If, when connecting through SSH, you get errors like this:

Then you may have cloud firewall rules that restrict access to port 22. To find out if that's the case, follow the steps given in this guide.

Is the SSH tunnel redirecting to HTTPS?

If you created a tunnel correctly but, when accessing the tunnel via web browser you get this error:

Check the URL in the browser bar. If you see that it is using HTTPS, then you probably configured HTTPS redirection in Apache following these instructions. If that's the case, change the tunnel configuration to forward to port 443 instead of port 80. The example below uses the ssh command-line client (replace the PATH_TO_SSH_KEY and IP_ADDR placeholders):

Have you enabled the SSH server in your OVA?

If you are using a Bitnami local virtual machine and you get this error when accessing through SSH:

That means that the SSH server is not running. In our virtual machines the SSH server is disabled by default. Enable it by following this guide.

Is your SSH server broken?

If you were able to access through SSH and you suddenly start getting errors like this:

Or:

Check that you did not change any of the SSH server settings, for example files like:

• /etc/ssh/sshd_config
• /home/bitnami/.ssh/authorized_keys

An error modifying these files could break the SSH server. If that happens, you will lose the connection to it. Depending on the cloud, you can fix the issue in two ways:

If your cloud console allows VNC connections or web-based SSH (like Google Cloud), then you can still connect to the instance and fix the issue manually.

This method requires more advanced knowledge. Make sure you check your cloud provider documentation:

• Launch a new instance.
• Detach the virtual disk from the broken instance.
• Attach the disk to the new instance.
• Mount the new disk.
• Now you have access to the broken system filesystem. Fix the issue in the SSH configuration.
• Attach the disk back to the old instance.

Does your SSH key-pair have the proper permissions?

If you are in a Linux or MacOS environment and encounter the following error:

That means your key-pair is vulnerable. Set more restrictive permissions on your key-pair by executing this command (replace the PATH_TO_SSH_KEY placeholder):

Ssh_exchange_identification Read Connection Reset By Peer 2

Are you getting a remote host identification error?

If you get this error when accessing through SSH:

Check whether one of the following has occurred:

Ssh_exchange_identification Read Connection Reset By Peer Software

• You just reassigned a static IP or DNS record from one instance to the one you are trying to connect to.
• It is the first time you are trying to access the instance. In this case it may have reused an ephemeral IP.

Fatxplorer serial. If so, open your .ssh/known_hosts file:

• Look for any entry that references the address you are trying to connect to.
• Remove the line.
• Save the file.

This should fix the identification error.

Ssh Exchange Identification Error

If none of the above applies, contact your cloud provider as it could be a man-in-the-middle attack.

Useful links

The following resources may be of interest to you:

This tutorial is meant to help troubleshoot connection reset by peer issues you might have while using SSH.

Ever tried to SSH into your server and seen an error like this?

The first thing you should always do if SSH fails is try again with verbose logging on. Just try something like this:

If the problem is on your client's side, some sort of error should show up in that log. If you aren't seeing anything useful in there, the problem may be with your server.

The Tricky Part

So, how do you get on your server if you cant ssh!?

If you're lucky, your host will provide you with some sort of shell access via their web UI. If not, they should at least offer some alternative method for access. That part you'll need to figure out for yourself.

After You Get Access

If you want to see everything that SSH is doing on the server side, here's what you can try ( assuming Debian or Ubuntu here ):

That will show you a real time log of everything that happens to SSH. If, as I suspect, you are banned from your server ( fail2ban or some other program has put your IP in /etc/hosts.deny ) you should see something like this in the log:

It could mean a number of things, but very likely you're being blocked by hosts.deny. The simplest way to test would be to put an allow all in hosts.allow

and put in something like:

Then try re-connecting. If that was your problem, try re-configuring fail2ban or whatever you have on your server that is sticking IPs into hosts.deny. If not, keep Googling! 😉

Written by Jon Kupermanliving in Florida working on Adobe's Creative Cloud.You should follow him on Twitter