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  1. ZABBIX FEATURE REQUESTS
  2. ZBXNEXT-3411

SSH agent banner configuration

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Details

    • New Feature Request
    • Status: Open
    • Minor
    • Resolution: Unresolved
    • 3.0.4
    • None
    • Server (S)

    Description

      Hello,

      I was not able to connect to ExtremeNetworks switches using Zabbix SSH agent item. It was working with the classic openssh client. We got this on the zabbix_server log :

      error: Cannot establish SSH session:

      We've narrow it down to a problem with the libssh2 banner. We adapted the "ssh2.c" example program from the libssh2 project to take a banner as an argument (using libssh2_session_banner_set function) Here is the result :

      This is not working :

      $ ./ssh2 192.168.0.10 admin xxxx SSH-2.0-libssh2_1.7.0_DEV
      Failure establishing SSH session

      $ ./ssh2 192.168.0.10 admin xxxx SSH-2.0-libssh2_
      Failure establishing SSH session

      But this is working :

      $ ./ssh2 192.168.0.10 admin xxxx SSH-2.0-libssh2
      Fingerprint: F9 72 8F 75 1E 2B F8 63 E9 19 77 B6 6C 50 C1 13 B4 80 77 5D

      $ ./ssh2 192.168.0.10 admin xxxx SSH-2.0-libssh42
      Fingerprint: F9 72 8F 75 1E 2B F8 63 E9 19 77 B6 6C 50 C1 13 B4 80 77 5D

      $ ./ssh2 192.168.0.10 admin xxxx SSH-2.0-libssh
      Fingerprint: F9 72 8F 75 1E 2B F8 63 E9 19 77 B6 6C 50 C1 13 B4 80 77 5D

      $ ./ssh2 192.168.0.10 admin xxxx SSH-2.0-zabbix
      Fingerprint: F9 72 8F 75 1E 2B F8 63 E9 19 77 B6 6C 50 C1 13 B4 80 77 5D

      I've created https://support.zabbix.com/browse/ZBX-11130 before being able to a very recent version of ExtremeXOS. The update made libssh2 working.

      I think that being able to configure the ssh banner could be a nice thing to have to workaround those kind of problem.

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              Unassigned Unassigned
              jbdenis jbdenis
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              Dates

                Created:
                Updated: