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  • 1.  Host standalone backup

    Posted Nov 01, 2023 03:37 PM

    I have esxi standalone , I assigned vmnic with new vswitch and vmkernal IP within backup network, the backup team use software to add our esxi host to their backup software but it show to them error "vmware credential validation failed cannot connect on socket 25"

    Where could be the issue, please support

  • 2.  RE: Host standalone backup

    Broadcom Employee
    Posted Nov 01, 2023 04:12 PM
    What backup software?

    What license do you have for your ESXi host?

  • 3.  RE: Host standalone backup

    Posted Nov 02, 2023 06:12 AM

    Veritas the backup tool, and license is Vmware vsphere 6 foundation for embedded OEMs, with features one of them storage/vsphere APIs

  • 4.  RE: Host standalone backup

    Posted Nov 03, 2023 02:10 PM

    Did you checked this KB from Veritas support?

  • 5.  RE: Host standalone backup

    Posted Nov 04, 2023 09:53 AM

    Article mentioned "This port and service are not present on a Virtual Center Server/ESX Host and will result in a "cannot connect on socket" failure."

    What port/service need to check on esxi , as I checked port 902 and 443 allowed

  • 6.  RE: Host standalone backup

    Posted Mar 19, 2024 03:01 PM

    The mix-up with port 25 is unusual for ESXi-Veritas communication. This port is typically for SMTP, not backup tasks. I'd suggest checking Veritas's configuration to make sure it's aiming at the right ports (443 for HTTPS, 902 for VMware console communications) and not mistakenly set to use port 25. Also, give your firewall and network settings another look to confirm nothing's blocking essential backup traffic. Sometimes, unexpected blocks or misconfigurations can lead to such errors.