What could have caused this?

After an upgrade from ESXi4.0 to ESXi5.0 you are unable to putty your hosts. What could have caused this?

A.
The SH port in ESXi 5.0 has changed to 443 for added security.

B.
SSH is not available with ESXi5.0, it is only available with ESX5.0

C.
SSH is always disabled after an upgrade or clean installation.

D.
SSH configuration is not migrated for ESX 4.x hosts or ESXi 4.0 hosts. For these hosts, SSH access is disabled during the upgrade or migration process.

4 Comments on “What could have caused this?

  1. pete says:

    The answer is correct. See vsphere-esxi-vcenter-server-50-upgrade-guide.pdf page 73.

    “The host SSH configuration is migrated only for upgrades from ESXi 4.1 to ESXi 5.0
    SSH configuration is not migrated for ESX 4.x hosts or ESXi 4.0 hosts. For these hosts, SSH access is disabled
    during the upgrade or migration process. You can reenable SSH access in the direct console.”

  2. b says:

    SSH Configuration Affected by Upgrading or Migrating to ESXi 5.0
    The host SSH configuration is migrated only for upgrades from ESXi 4.1 to ESXi 5.0
    SSH configuration is not migrated for ESX 4.x hosts or ESXi 4.0 hosts. For these hosts, SSH access is disabled
    during the upgrade or migration process. You can reenable SSH access in the direct console. See the information
    on enabling SSH access in the vSphere Installation and Setup documentation.

  3. Brian says:

    OK so to further complicate things, take a look at vmWare’s Knowledge Base:
    KB: 2005054 Updated: Mar 27, 2012 Product(s): VMware ESXi Product Version(s): VMware ESXi 5.0.x
    http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2005054

    It says that the “Files Migrated During Migration or Upgrade from ESX/ESXi 4.x to ESXi 5.0” includes /etc/ssh. OpenSSH is now included in ESXi 5.0.

    It gives an entire table of the files that ARE migrated. Including these answers to a similar exam question:
    /etc/ssh OpenSSH is now included in ESXi 5.0.
    /etc/fstab (Partial) Only NFS entries will be migrated to ESXi.
    /etc/vmware/esx.conf The host configuration


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