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'''VT_WLAN''' service is available in approximately 90% of academic and administrative spaces across the Blacksburg campus. This wireless network is composed of unencrypted IEEE 802.11a/b/g /n access nodes. To limit access to faculty and staff, VT Communications Network Services uses a Cisco captive portal. They switched from Bluesocket during the summer of 2009. You have to register for [http://www.cns.vt.edu/html/wireless/wlan/registration.html Customer OnLine Access (COLA)] or in person at the Student Telecommunications Office to enable your account.
==Authentication==
* You can ping (but not traceroute) without logging in. Ping tunneling works both locally and over the open internet. Some users have reported being temporarily banned from DHCP servers when ping tunneling before authenticating.
* All wireless networks (including the .1x networks) on campus use [[rfc:1918|RFC-1918]] addresses from the 172.31.0.0/16 network. These are translated 1 to 1 with NAT into 198.82.x.x addresses for access outside the wireless network.
* IPv6 access to local and internet sites, including web access to [http://www.cns.vt.edu/ CNS] and Google, is completely unrestricted regardless of authentication status, except in [[Torgersen Hall]] and [[Newman Library]] where new access points have been deployed.
==See Also==
