The eth0 interface in CentOS 6.3 is named em1 instead of eth0.<br />
This prevents Flexlm server to verify the eth0 hardware address (hostid).<br />
All my professional software stopped working.<br />
I managed to follow some forums and rename the interface back to eth0 and everything is working again.<br />
<br />
I think it is a simple but very serious issue to correct.
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