gethostbyname fail after switching internet connections

The answer is very simple - here is what seems to work.

I edited the file /etc/hosts (or /private/etc/hosts, in OSX) and added the line

127.0.0.1   macbook-pro.local

so now my hosts files looks like :

##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting.  Do not change this entry.
##
127.0.0.1   localhost
255.255.255.255 broadcasthost
127.0.0.1   macbook-pro.local