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- Connection closed by UNKNOWN port 65535 - GitHub
It looks like the connection is being closed before the key exchange starts, which usually points to an issue with the proxy rather than SSH itself A couple of things you can try:
- ssh_exchange_identification: connection closed by remote host
In this tutorial, we will go over a few different causes for this error and show you how to troubleshoot the connection on your system Using one of our methods below will hopefully remedy the error and allow you to log in via SSH
- How to Fix kex_exchange_identification: connection closed by remote host
By following the troubleshooting steps and solutions outlined in this article, you should be able to fix the “kex_exchange_identification: connection closed by remote host” error and successfully connect to the remote server via SSH
- sshd: error: kex_exchange_identification: Connection closed by remote host
sshd: error: kex_exchange_identification: Connection closed by remote host Solution Unverified - Updated September 13 2024 at 3:39 AM - English
- Demystifying and Troubleshooting the “kex_exchange_identification . . .
In this comprehensive guide, we’ll demystify the kex_exchange_identification step, look at the most common culprits behind this SSH error, walk through detailed troubleshooting procedures, and review preventative measures to avoid headaches down the road
- kex_exchange_identification:connection closed by remote host
error: kex_exchange_identification: connection closed by remote host? Learn how to resolve it with step-by-step instructions, with proven solutions
- Connection closed by UNKNOWN port 65535 when attempting SSH in . . .
I've been trying to set up a SSH jump server in order to connect to my servers when I'm at work, which is employing a really annoying (and slow) corporate proxy and blocking everything going to the outside besides port 443 and 80
- What causes SSH error: kex_exchange_identification: Connection closed . . .
For network pros and sysadmins in 2025, this isn’t about typos in ssh user@host—it’s a symptom of deeper misconfigs, security clamps, or network gremlins Let’s dissect the causes, from protocol mismatches to resource exhaustion, with advanced diagnostics to pinpoint and fix
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