Item SSH agent does give unsupported authentication method error on Raspberry.

[irs vk]

Problem description:
Different behavior of SSH agent item for Zabbix server on Raspberry (5.2.6 , installed according to documentation) or in Docker container (5.2.6 from github https://github.com/zabbix/zabbix-docker).
I want the Zabbix server to be running on the Raspberry, so the SSH agent item should also work on the Raspberry.

For both environments the steps done are:

• Create a new template
• Create an item:
  • Type: SSH agent
  • Key: ssh.run[clean]
  • Authentication method: Password
    • User name: give correct user name
    • Password: give correct password
  • Executed script: command that I want to use
• Test the created item, give different results
  • Raspberry: error message “unsupported authentication method. Supported methods:”
    • I found in the Zabbix repo (https://git.zabbix.com/projects/ZBX/repos/zabbix/browse/src/zabbix_server/poller/checks_ssh.c#179,229,527)
    • Found that “ssh_userauth_list” function is used, which could return nothing, that is the case.
    • From the Raspberry itself, SSH communicate with the device used for the test the scritp does work.
  • Docker container: no error message, result was as expected.

When testing this for another type of device (more advanced Linux system) the Zabbix server on the Raspberry, does show the result as expected.

What is causing this difference and how can I solve this?

[irs vk]

This issue has been solved.
It was related to a network issue. Ön the tested device a DNS service was running, which causes a time-out and an empty list for "ssh_userauth_list.