The Illini Union and Grainger Engineering Library have walk up computers available on the Illinois network. Grainger is one block west of ESB and the Illini Union is two blocks west of Loomis Lab.
To login to the campus network with your computer and to use some University resources, you will need a guest account. Usually the ICMT staff can have an account ready for you when you arrive, however, if necessary, any Illinois faculty, staff member, or student can create a limited number of guest accounts.
Wireless is available in public places in Loomis, MRL, and ESB. More detailed information is available for Loomis, MRL, and ESB, the Illini Union, and all other campus buildings. If you have been assigned an office, it should have network access.
Only a few locations have public wireless; they include Krannert Center for the Performing Arts (one block south of Loomis) and Willard Airport.
CITES (Campus Information Technologies and Educational Services) has a Guide for Guests and Visitors.
CITES has a help desk, and the Physics Department has a help ticket system.