There are two independent WiFi networks in FIT campus:
he VUTBRNO and eduroam WiFi networks are accessible to all BUT students and
employees who have account in the BUT information system (VUT login)
and VUT pin. Additionally, the eduroam WiFi network is accessible
to all persons from organizations involved in
the eduroam project.
- Network VUTBRNO is open unencrypted network with web authentication.
This network is intended primarily for participants in events
and conferences, and for emergency connection in case of WPA2 configuration
- eduroam uses WPA2 encryption and authentication using the
Radius password. The advantage is simpler integrated authentication
and security of connection.
- Božetěchova 1:
- cafeteria L104 (g/5/n),
- building L - all floors (g/5/n),
- computer labs M, N, O corridors (g/5/n),
- meeting room S206 (g/5/n),
- labs and offices S214, S215, S210 (g),
- exhibition hall R110 (g),
- student club R212 (g),
- laboratory Simstar (g),
- Student seminar room (g/5/n/ac),
- Božetěchova 2:
- lecture rooms E104, E105 a E112 (g/5/n),
- lecture rooms D105, D0206 a D0207 (g/5/n/ac),
- lecture rooms A112 a A113 (g/5/n/ac),
- seminar room A218 (g/5/n),
- meeting room G108 (g/5/n),
- meeting room C209 (g/5/n),
- lecture room G202 (g/5/n),
- library C126 (g),
- seminar room C225 (g/5/n),
- lab C304 (g/5/n),
- corridor 2nd floor building A (g),
- corridor 2nd floor building C (g),
- respirium 3rd floor building B (g),
- other access point at BUT (may not be available in english)
Conditions of Use
- WiFi card conforming to IEEE 802.11b/g/n/ac standard, standard
settings, default IP address obtained by DHCP. Setting up a fixed
address in a WiFi network will be seen as a serious violation of
the BUT computer network operating rules
- Wi-Fi Hotspots (Wi-Fi Sharing on Mobile, Tablet, or NB) is forbidden!
Due to the limited number of free WiFi channels, you are interfering with the
AP WiFi signal and degrading WiFi network bandwidth for everyone else in
the area. Likewise, it is forbidden to use Network Bridging on WiFi
Adapter in MS Windows - how to verify see FAQ below. By turning on
bridging, your computer tries to impose on everyone else that it is
the default IPv6 gateway for the whole network.
- Configure SSID=EDUROAM or VUTBRNO (or search for available networks and choose).
- For SSID=eduroam authentication WPA2/AES with PEAP/MS-CHAP-V2 is required.
For authentication, the Radius password is used . If you have an eduroam
account in any affiliated institution, your home account should work.
FIT students and staff can create a Radius account in the @Fit.vutbr.cz
domain in the FIT information system (and again they should work in any
other institution involved in eduroam).
- Not recommended for students and employees: Authentication of
SSID VUTBRNO is via the Web site. After pairing to the AP and gaining an
IP address via DHCP, you must run any web browser on any page that
will be redirected to the BUT WIFI authentication page
(if not, first verify that you have an IP address assigned in the
range of 100.65.64.2 - 100.65 .71.254 with the default gateway 100.65.64.1,
and if you do not accidentally set up a proxy cache server for http / https).
For VUTBRNO authentication, "VUT PIN" is used. The VUTBRNO WiFi network uses
a shared address space within the BUT network according to RFC 6598 and
an address translation (NAT) is used to access the Internet. After
authentication, you obtain free access to Internet, but the
gateway does not permit any incoming connections. As a result
it is not possible to run services (servers) over WiFi and for ftp access
passive mode is required. This authentication method is operated for
a temporary emergency connection, eduroam is recommended for standard use.
- VUTBRNO WiFi network is not secured against wiretapping,
and everything you carry on it can easily eavesdrop on anyone. Therefore,
never enter any sensitive information (passwords) with unencrypted protocols
(http, telnet, ftp, imap4, pop3, etc.).
- VUTBRNO WiFi network is not considered as a part of FIT computer network.
Therefore all services of FIT network may not be available.
- In the WiFi network, transmission capacity is shared by all devices
attached to one access point, and therefore any larger data transfers
(notably in the lecture halls) are undesirable. The amount of data transferred
is monitored and, if the limit is exceeded, the bandwidth limitation or
denial of access to the WiFi network is applied. Use Wired Connections
in CVT to transfer large volumes of data.
The network was started up on Octber 16th 2003, for operational access points see map of campus.
- How Can I Obtain BUT password?
- See Computer Centre->Guieds, manuals->Student Accounts
- What does Mean 802.11a,b,g Names?
- These names indicate IEEE 802.11 standards for wireless local networks.
The oldest IEEE 802.11b defines transmission in 2.4GHz range using 1-11 Mb/s.
IEEE 802.11a defines speed 6-54Mb/s in 5GHz range and IEEE 802.11g in the same range as 802.11b with speed 1-54Mb/s (different signal modulation in the same frequency range).
Devices in 2.4GHz range are permitted by General License and do not require
- Why 802.11g throughput is 10Mb/s only (instead of 54Mb/s)?
- 54 Mb/s throughput of 820.11g network is theoretical signaling rate.
This speed cannot be achieved - unlike wired networks where 100Mb/s may
be really used.
Real transfer rate of 802.11g is 20 Mb/s on very special conditions -
distance from AP just few meters, single client in the network, no 802.11b
card in the network.
If there is even a single 802.11b card in the network throughput of the network
is significantly restricted because of RTS/CTS protocol which has to switch to
802.11b slow signaling rate. The network speed in such circumstances
often drops down to 10Mb/s.
More details may be found in
When Is 54 Not Equal to 54?.
In addition, the throughput depends heavily on the chipsets and APs used,
and the firmware and driver versions. If multiple clients are associated
with the AP, they share the bandwidth and the bandwidth decreases
drastically (unlike a switched wired Ethernet network where all clients
can use full bandwidth at the same time).
- Why is my connection dropping?
- See the WiFi card driver settings to make sure that you have not set
the battery power saving to turn off WiFi.
- Why is WiFi so slow (ping roundtrip is 100 ms)?
- There are probably too many clients associated to an AP transferring large volume of data.
- What 802.11n/ac?
- IEEE 802.11n/ac introduces new methods for higher
transmission rates such as simultaneous broadcasting and receiving,
multiple antennas, greater bandwidth (optionally up to 80/40 MHz
instead of 20 MHz), and more efficient coding and modulation. All
devices according to these standards can communicate with older
standards (g, n). APs according to the 802.11ac standard are installed
from 2016 in the A, D and E112 lecture halls, AP 802.11n are in the
E and G lecture rooms and in the Computer Centre laboratories. Due to higher
bandwidth requirements, we can operate 802.11n/ac only in the
5GHz band on our premises, so if you buy a new laptop, prefer WiFi
802.11n/ac in the 5 GHz band (usually advertises 802.11a support).
Theoretically, 802.11n can achieve up to 300 Mbps in the 5 GHz band
(with two antennas, the most efficient modulation and 40 MHz
bandwidth). In the 2.4 GHz range, a maximum of 72 Mbps (1 antenna)
or 144 Mbps (2 antennas) can be achieved. Mobile
devices (mobile, tablet) typically have only one antenna.
- WiFi is fine but what about power outlet
- Where electricity is available, sockets have been added. In
2010, power outlets were added to the E112 lecture hall, adding to other
lecture halls encountering construction problems. Free power outlets in
the corridors can be used, of course, only in places where laptop
seating does not prevent the movement of people going.
- How to recognize Bridge and how to remove it?
- If there is Network Bridge among your network adapters you have to either remove it
or at least remove WiFi adapter from the bridge: right-click on the icon a choose Remove from Bridge