agentless monitoring of linux servers from ossec

we’ve been poking around ossec for a while. it’s nice and all but… i never liked the idea of opening additional ports on the production server or letting it ‘call home’ with alerts to the central monitoring machine. i prefer ‘polling’ model where central server communicates with monitoring nodes. ideally all should be done via …

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poor man’s vm clonning under vsphere 5 without downtime

how to clone a virtual machine under vmware vsphere 5: using the vsphere client create a new vm with similar parameters [at least the same number and size of hard drives] using the vsphere client create a snapshot of the original vm log in via ssh as root [ to enable the ssh access check …

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Call “HostFirewallSystem.UpdateRuleset” for object “firewallSystem” on ESXi “…” failed.

while poking around brand new installation of free edition of vmware vsphere 5 i managed to screw up the firewall. in result any changes done in vshpere client in configuration>security profile>firewall properties were resulting with errors: i’ve found a solution here. to get rid of errors from gui i had to: ssh to the vsphare …

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