/etc/hosts

dhcp:
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost

static:
127.0.0.1 localhost.localdomain localhost
207.214.146.135 squid.digitalpipe.com squid.digitalpipe.net squid

See also /etc/sysconfig/network