Wi-Fi

The following Wi-Fi networks are available in the Karlín building:

• eduroam (for univeristy students and staff)
• msekce-guest (for guests not connected to the university)

Useful information:

• Information about the computer network in Karlín
• University and Faculty Computer Network Rules (unofficial summary)

Wi-Fi network eduroam

The eduroam network is intended for university students and staff (and can also be used by students and staff at other institutions involved in the eduroam.cz project). Rules for users of the eduroam network:

• Roaming policy of eduroam.cz

Before connecting to the eduroam network for the first time, you need to set up a password for the network in CAS (University "Central Authentication Service"):

1. Log in to CAS.
2. In the left menu click on "Other accounts" and then "Set password for eduroam realm cuni.cz".
3. At the top of the page it will tell you what login to use for eduroam (number@cuni.cz), and below that are the boxes to set the password.

Connecting your computer to the eduroam Wi-Fi network is then easy:

• Network name (SSID): eduroam
• Username: number@cuni.cz (where the number is the personal number at the university)
• Password: the password you set up for eduroam in CAS according to the procedure above

If your computer's operating system requires any other technical data to be set up for the connection, the security type used is: PEAP and MSCHAPv2. If you have trouble setting it up, check the manuals for the various operating systems (including those for mobile devices): How to connect to eduroam. Also check that you have set the correct date and time on your device (too much time difference can cause the connection to not work).

List of blocked network services (ports) from 18 September 2024:

• TCP/25 (SMTP) – for sending e-mails can be used port 587 (or 465)  
• BitTorrent (TCP/UDP 6881–6889) – blocked due to use for copyright infringement

Wi-Fi network msekce-guest

The msekce-guest network is intended for those guests of School of Mathematics staff who do not have a contractual relationship with university (i.e. do not have a CAS account). To connect to this network, please contact one of the administrators of the Karlín computer network.

Connecting your computer to the msekce-guest Wi-Fi network is then easy:

• Network name (SSID): msekce-guest
• Username: login@msekce-guest
• Password: the password you set up for the msekce-guest network with the network administrators

The security type (PEAP/MSCHAPv2) is the same as the eduroam network.

For security reasons, traffic on the msekce-guest network is limited to the most common network services: web, e-mail, FTP, SSH, VPN (see Technical Requirements of eduroam (Czech), section 3.10). In addition, the following network services/ports are allowed:

• TCP: 37 (time), 119 (news), 389 (ldap), 563 (news SSL), 636 (ldap SSL), 1194 (Open VPN), 1352 (Lotus Notes), 2401 (cvs), 3389 (rdp), 3690 (svn), 4156 (AVG), 4158, 4244 (viber), 4443, 4444, 5066, 5190 (icq), 5222 (jabber), 5223 (jabber SSL), 6051 (Arcserve backup), 6054, 6667 (irc), 9418 (git), 10443, 20301, 27000
• UDP: 53 (dns), 123 (ntp), 1352 (Lotus Notes), 3690 (svn), 5060 (SIP), 5066, 8000, 8001, 3478, 27000

As of 18 September 2024, the TCP/25 (SMTP) port is blocked – it is possible to use port 587 (or 465) for sending e-mails.