When trying to login in eB Director if you are not able to connect the community on different server it gives "eB Proxy Error"
Workaround :
1) Try to Restart the eB indexing services through Computer Management.
or
2) Try to reset a client resolver cache using the ipconfig command as this will reset the contents of the DNS client.
a) Open the command prompt (Start> All Programs > point to Accessories and click on Command prompt)
b) Type ipconfig/flushdns.