Caltech now offers eduroam wireless internet service. eduroam is the secure, world-wide roaming access service that allows students, faculty, and staff from participating institutions free internet connectivity when visiting other participating institutions. To use eduroam at a participating institution, select the wireless network "eduroam". When prompted, enter your username as email@example.com and your access.caltech password.
eduroam is available in 54 countries. Visit https://www.eduroam.org/?p=where for a list of institutions that provide eduroam service.