Cannot Restore LAN Connection

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http://www.unix.com – I have two servers, and, that were connected across a LAN. They are the components of a DMZ where is the wen server and the application server. is running Ubuntu 11.04 while is running Ubuntu 11.10. I had to restart because Unity froze up. (I have since replaced it with Gnome.) Ever since I started it up again, I cannot get connectivity with When I try Code: ping I get Code: PING ( 56(84) bytes of data. That is, it just hangs. I get the s (HowTos)