Westnet Wireless Discussion Moderated by Jeff Custard Thursday, January 31, 2002
Some potential topics • 802.11g (more b/w in 2.4GHz range—already crowded—good or bad solution?) • 802.11e (the standard that promises to bring QoS to the 802.11 world--still in committee (date to be finalized??) • 802.11a • Instructional Television Fixed Service (ITFS)--frequency leasing [Sprint not selling this service now? Pat?] • L3 Mobile IP? • Subnetting schemes? (one or multiple wireless networks?) • Access Point security? • Power delivery to APs? • Usage monitoring policies? • Multicast and wireless issues (restrict bandwidth?)
more potential topics • Authentication schemes? • Web based SSL (redirect all port 80 requests to an auth server? Which username/password?) • MAC address statically filtered • Encryption schemes? • VPN tunneling schemes? • WEP use? • Request or require secure protocols? • Border gateway schemes? • iptables on a Linux box? • Warnings/policies? • WLAN? • WWAN?
Other wireless technologies? • HomeRF - http://www.homerf.org • Bluetooth - http://www.bluetooth.com/ • IrDA - http://www.irda.org/ • Miscellaneous proprietary solutions (e.g., RadioLAN, BreezeCOM, Wave Wireless Networking, et al) • IEEE 802.15 (Wireless Personal Area Networks (WPANs)) • IEEE 802.16 (WMANs) • HiperLAN/2 –limited to deployment in Europe?
What’s going on at: • Colorado State University • Idaho State University • University of Colorado at Boulder (at Denver?) • Arizona State University • New Mexico State University • University of Arizona • Boise State University • Brigham Young University • Northern Arizona University • University of Wyoming • University of Utah • University of New Mexico • Colorado School of Mines • Others?
802.11x • 802.11g: standards extension to 802.11b • Up to 54Mbps in 2.4GHz range (typically ~20-26Mbps more likely) • IEEE 802.11a • operates in the 5-GHz bands • data rates up to 54Mbps • 8 channels instead of 3 • 802.11e • An attempt to move away from interference automatically • Better error-correction and b/w mgt? • Still under development (NOT “real” QoS though being touted that way)
Latest at NCAR • Providing access to both staff and guests • Wireless will be wide open • No WEP • No SSID • Security provided at higher layers • The wireless network will have no unfiltered network access • Staff will log in to a VPN server to gain regular network access • Guests will log into a web page to open up a filter hole for them
Specifics of how: • Wireless network has no normal router • A *BSD box will route all the traffic • The "router" will add and remove ipfilter rules as needed • Permanent rule for access to our VPN server for staff • Guests will log in to a web page • Staff can create group accounts on a special internal web page • When guests log in, filter rules to allow their traffic will be created
ITFS info • From www.itfs.org: • The Instructional Television Fixed Service (ITFS) is a band of twenty (20) television channels available to be licensed by the FCC to local credit granting educational institutions. The channels can be used solely to deliver instruction, or in partnership with companies (Wireless Cable) which deliver a subscriber based video service that competes with land based cable television systems to deliver entertainment programming.
URLs • Wireless Ethernet Compatibility Alliance (http://www.wirelessethernet.org/) • Wireless-Nets consulting services guide (http://www.wireless-nets.com/guide.htm) • IEEE 802.11b Working Group (http://grouper.ieee.org/groups/802/11/) • 802.11a—Fast Wireless Article (http://www.extremetech.com/article/0,3396,s%253D1034%2526a%253D19380,00.asp) • http://www.rf-solutions.com/about_standards.htm • http://www.atheros.com/AtherosRangeCapacityPaper.pdf