freget opened a new pull request #15964:
URL: https://github.com/apache/airflow/pull/15964
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When using the SSHHook to connect to an ssh server on a non default port,
the host_key setting was not added with the correct hostname to the list of
known hosts. In more detail:
```python
from airflow.providers.ssh.hooks.ssh import SSHHook
import paramiko
from base64 import decodebytes
hook = SSHHook(remote_host="1.2.3.4", port=1234, username="user")
# Usually, host_key would come from the connection_extras, for the sake of
this example we set the value manually:
host_key = "abc" # Some public key
hook.host_key = paramiko.RSAKey(data=decodebytes(host_key.encode("utf-8")))
hook.no_host_key_check = False
conn = hook.get_conn()
```
yielded the exception
paramiko.ssh_exception.SSHException: Server '[1.2.3.4]:1234' not found
in known_hosts
closes: #15963
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