PowerShell / PowerShell/Win32-OpenSSH
Unable to Use SSHFP Records to Verify SSH Host Keys
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Description
Troubleshooting steps
https://github.com/PowerShell/Win32-OpenSSH/wiki/Troubleshooting-Steps
Terminal issue? please go through wiki
https://github.com/PowerShell/Win32-OpenSSH/wiki/TTY-PTY-support-in-Windows-OpenSSH
Please answer the following
"OpenSSH for Windows" version
8.1.0.1
Server OperatingSystem
Debian GNU/Linux 11 (bullseye) x86_64
Client OperatingSystem
Windows 10 Education
What is failing
Unable to use SSHFP Records to Verify SSH Host Keys.
Expected output
Matching host key fingerprint found in DNS.
Which is what I get from OpenSSH client inside Ubuntu WSL.
Actual output
debug3: verify_host_key_dns
getrrsetbyname is not supported
DNS lookup error: unknown error
No matching host key fingerprint found in DNS.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the verify_host_key_dns path shown in the Windows OpenSSH debug output and compare its SSHFP handling with the successful Ubuntu WSL behavior. Reproduce the lookup using the reported Windows client and Debian server, then confirm that a matching SSHFP record produces the expected verification message.
Written by the indexing model from the issue text.
Assessment
- Domain
- networking, security
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100