EMC Isilon -Shutdown via CLI

The following procedure uses Isilon CLI commands to shut down the entire cluster.

Cluster Shutdown Procedure:
1. SSH connect to node1 of the cluster and log in as the root user.
2. From the command prompt, type the following commands in this order:
isi_for_array isi_flush
isi config
shutdown all

If a specific node does not power down follow these steps to shut it down:
1. SSH to the node.
2. Log in as root and type:  shutdown -p now

Windows Server – File Share Permissions Not Propagating

If you are experiencing file share permission issues where user permissions are not propagating down to the subfolder level then the following post may help with your troubleshooting.

Scenario: While the user is experiencing no issue while working on the initial layer of folders within a Windows file share, the user cannot work on subfolders and files that are more than one layer deep in the file share structure: Continue reading

Mail Flow Troubleshooting

NSLOOKUP
At the command prompt type “NSLOOKUP “.
This will give you a “>” prompt.
Type “set type=MX “.
Type “microsoft.com “.
You should now get the MX records for “microsoft.com”:
Non-authoritative answer:
microsoft.com MX preference = 10, mail exchanger = microsoft-com.mail.protection.outlook.com

microsoft-com.mail.protection.outlook.com internet address = 207.46.163.215
microsoft-com.mail.protection.outlook.com internet address = 207.46.163.247
microsoft-com.mail.protection.outlook.com internet address = 207.46.163.138

Or Use who.is:
http://who.is/

Telnet:
Using Telnet from Windows to test port 25, from the command prompt window type:

telnet server port
Example:
telnet mail.eircom.net 25
or whoever the SP is ..

TELNET – BLACKLISTED:
521 connection rejected
Connection to host lost.

Blacklist lookup/release:
http://www.fortiguard.com/static/ip_lookup.html

Tools:
http://mxtoolbox.com/NetworkTools.aspx