First, download the current Cisco AnyConnect software from website Download Cisco AnyConnect Client-Software. You will find it below the table under the red marked link "AnyConnect for Windows (Version XY)".
TAKE CARE: check whether the correct link text is displayed in the URL line of the browser:
"https://tu-dresden.de/zih/dienste/service-katalog/arbeitsumgebung/zugang_datennetz/vpn/ssl_vpn"
You should also check the authenticity of the certificate by clicking on the small lock symbol to the left of the URL. The connection must be secure and the certificate valid.  Otherwise the website is fake and someone wants to phish your credentials or offer you malware for download, in which case you should contact the Service Desk:

1. Start the installation as described on the download page. The setup wizard for the installation will be executed. Please click on "Next" first.

2. Please read the license terms now. If you agree, accept them and click "Next" again.

3. Now the software will be installed. During the installation you will see a progress bar.

4. After successful installation, please click "Finish".

Establishing a connection

1. Please start AnyConnect from the Windows program menu. Please enter the URL of the VPN gateway in the "VPN:" field: "vpn2.zih.tu-dresden.de". After that, please click on "Connect".

2. In the field "Username:" please enter your "ZIH-Login@tu-dresden.de". If you want to use a license server, please enter your VPN group or your ZIH-Login. In the field "Password:" please enter your ZIH-Login password.

3. In the "Group:" field, you can specify which connections should be made over the VPN. You have the following options:

• A-Tunnel-TU-Networks – Connections to all networks of TU Dresden (public and private IP addresses) via VPN 
• B-Tunnel-Public-TU-Networks – Connections to networks of TU Dresden with public IP adresses via VPN. Use this group, if you have problems due to overlapping private IP address space.
• C-Tunnel-All-Networks – All connections (also to destinations outside of TU networks) via VPN. If all you need is a TU Dresden IP address to access online resources, consider using OpenVPN instead.
• TUD-vpn-lic – Only connections to license servers (e.g. Mathcad) via VPN. Use only ZIH login name without the @-part (e.g. s1234567) in the Username field.
• Other groups (Z-*, TUD-vpn-*) – These groups are for special users/requirements only, use them only if instructed to do so.

After that, please click "OK":

4. After the VPN connection has been successfully established, you will be assigned an IP from the associated network of the TU Dresden. The connection is displayed in the Windows task bar with a lock symbol attached.

5. To disconnect from the VPN, click the icon in the taskbar and then click the "Disconnect" button.