Just out of curiosity, what is the current version of Apache installed on the east server. My 404 pages just say "Apache Server" but the httpd is sending "nginx" in the page header. phpinfo has led to be no help at all as well.
[root@east ~]# apachectl -v
Server version: Apache/2.2.15 (Unix)
Server built: Aug 13 2013 17:29:28