dns problem

["David C. Heitmann" <david@xxxxxxxxxxx>]

when i ping with connected to squid proxy cache....version 2.7 
stable5.....to www.google.de
then i get "cant find hostname"

why?
have i to configure a dns service on my squid server?
or have i to route something?

surfing over proxy works ;)


thanks for regards
greetz dave