ssh

kex_exchange_identification Connection Closed by Remote Host

What is the Cause for Error kex_exchange_identification Connection Closed by Remote Host?

While constructing a network of different devices, you may come across multiple challenges. Getting the right piece of hardware is not the only issue but configuring it the right way and making it work well with the rest of the devices is the real art. Having said that, many of the people with the networking background might have come across this issue that their network was working absolutely as intended previously. However, as soon as they introduced a new device to the network, it started malfunctioning and generating different errors.

In today’s article, we are going to talk about the probable causes of one such error, i.e., kex_exchange_identification connection closed by remote host.

Causes of the Error kex_exchange_identification Connection Closed by Remote Host:

The “kex_exchange_identification connection closed by remote host” error refers to the fact that a connection was first established but then interrupted for some reason. The very first thing that we would like to state over here is that there is no single cause that can be attributed to this error. It means that depending on the scenario, there can be different possibilities that are responsible for this error. Some of those causes are listed below:

  • The socket connection between the SSH server and the client has been interrupted.
  • The firewall is having too strict rules that it results in blocking even legitimate connection requests.
  • Addition of faulty equipment or device to your already existing network.
  • The SSH daemon could be consuming an unreasonably large amount of network resources.
  • Your ports could be excessively exhausted by connection requests.

These are some of the potential reasons that could be responsible for the kex_exchange_identification connection closed by remote host error. Each of these issues can be fixed by taking different types of measures.

Conclusion:

Today’s article was mainly focused on the kex_exchange_identification connection closed by remote host error that occurs while making network connections. We discussed with you the different possible causes for this error, however, the different solutions to fix the errors are out of the scope of this article.

About the author

Karim Buzdar

Karim Buzdar

Karim Buzdar holds a degree in telecommunication engineering and holds several sysadmin certifications. As an IT engineer and technical author, he writes for various web sites. He blogs at LinuxWays.