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Wireless network on FI

The wireless network runs on IEEE 802.11a, 802.11g, 802.11n, 802.11ac compliant hardware. Since the fall of 2019, the faculty's Wi-Fi infrastructure has been based on access points UniFi AP HD .

Eduroam network

The login name of the form uč is no longer supported, use uč .

How to connect to the eduroam network .

Eduroam ( EDUcation ROAMing ) is an international project supporting the mobility of users in academic networks. It allows users to connect to the networks of all participating organizations (especially via Wi-Fi). See map of covered places

Communication between the computer and the wireless access point is secured using WPA / WPA2. Segment, resp. 2001: 718: 801: 22c :: / 64. The connected stations obtain their IP address via DHCP, resp. via SLAAC. Unlike wlan_fi, it is not necessary to activate your machine after connecting to the network.

Wlan_fi network

After connecting to the network, authentication to is required for full Internet access or via the captive portal.

After assigning an IP address, only access to DNS servers and to is allowed from the station . For full access to the Internet, you need to activate your machine using URL access their faculty login details. Access is limited to a maximum of several hours.

Activation is also possible using the captive portal, which redirects to the login page with faculty authentication. If the captive portal does not appear automatically, it is necessary to open an HTTP-only page in the browser, e.g. , and then you will be redirected to the captive portal.

Staff and doctoral students have the opportunity to create short-term accounts for guests or events.

Segment, resp. 2001: 718: 801: 22b :: / 64. The connected stations dynamically obtain their IP address via DHCP, resp. via SLAAC.

In addition to spreading over a Wi-Fi network with the ESSID wlan_fi, this network is also available in some places via freely accessible Ethernet cables. Again, authentication via is required .

After activation, access to the Internet outside the FI network is allowed from the respective assigned IP address. From the point of view of the FI network, the connected computer is treated in the same way as any other computer outside the FI network. Therefore, all FI services that you can use should work, for example, if you are connected through another ISP. Conversely, some services will not work - for example, disk sharing via NFS and SMB (Windows).

The faculty firewall tests whether the activated computer is still active. If it does not respond to a ping (ICMP echo request) or ARP request for more than 5 minutes, the given IP address is canceled and the user must reactivate his address using the above URL.

Users must be aware that all communication between their computer and the wireless access point is eavesdropping, and even a potential attacker has the option under certain circumstances to take over their address and thus "hijack" existing connections. It is therefore recommended to use secure encrypted protocols (such as HTTPS, IMAPS, POP3S, and SSH) for both logon and data transfer.

Temporary network for events

For major events (type DOD) it is possible on request set up a dedicated Wi-Fi network with its own name / ESSID and shared password for its duration (if it is to be available in building S, for technical reasons, none of this must contain a space and ideally non-alphanumeric characters, except the underscore and hyphen). The theoretical capacity of the number of clients is due to the scale with 4000 addresses enough for almost any action.

Problem reporting

The most accurate problem reporting can be very helpful in successfully resolving a problem. It should include:

  • accurate description of the problem (too slow speed, high loss, inability to connect to the network, frequent disconnection from the network, ...),
  • identification of time (always given to the nearest minute), location in the building (if relevant) and network name (ESSID),
  • MAC address and OS of the device, and if possible attach system logs,
  • if the problem persists or has only recently become apparent,
  • Is the problem general or does it only happen under certain circumstances?

or anything else useful.

Links, documentation

  • Instructions for commissioning WiFi under Windows .