Secure Global Desktop 4.31 Administration Guide > Applications, documents and hosts > Applications disappear after about two minutes

Applications disappear after about two minutes

If users find that their applications disappear unexpectedly after about two minutes, it may be that your proxy server is timing out the connections. Proxy servers will drop a connection after a short period of time if there is no activity on the connection.

Secure Global Desktop sends keepalive packets to keep the connection open and by default this is every 100 seconds. If applications are disappearing, you may have to increase the frequency at which keepalive packets are sent to keep the connection open.

The AIP keepalive

The AIP keepalive is used for emulator sessions. It is used with the browser-based webtop and the classic webtop. To change the keepalive:

On your webtop, click Array Manager.
Click Emulator Sessions, Properties.
Change the AIP Keepalive setting, for example to 60.
Click Apply.

Alternatively, you can run the following command:

tarantella config edit --sessions-aipkeepalive secs

The webtop keepalive for the classic webtop

For the classic webtop only, you may also have to amend the keepalive used for the webtop connection. To change the keepalive for web browsers:

Open /var/docroot/resources/login/sco/tta/boot/strap.html and /var/docroot/resources/login/sco/tta/boot/autostrap.html.
Decrease the value for the AsadKeepAlive parameter, for example to 60.

If you have created any customized themes which use entry-point HTML files, you will need to modify the AsadKeepAlive parameter in those files instead. See Using Secure Global Desktop with proxy servers for details.

To amend the keepalive for Native Clients:

Open /var/docroot/resources/login/sco/tta/boot/serverinfo.html.
Decrease the WebtopKeepAlive=100 setting, for example to 60.

Related topics
Using Secure Global Desktop with proxy servers