Is your Portal Server using the default configuration? I.e. Is it configured to connect to the server on the local host (ServerHost localhost is set in portal.cfg file) or to a different server machine?
If Portal Server connects to the server on its host machine, you should be able to see the previous ‘Default Connection’ session listed among the available sessions when you connect again by web.
If you don’t see it listed, it can be that some problems occurred. In this case it could be useful to see logs, namely nxserver.log from /usr/NX/var/log.
Please set debug log level: edit /usr/NX/etc/server.cfg , /usr/NX/etc/node.cfg and /usr/NX/etc/portal.cfg
uncomment and set the following key: SessionLogLevel 7.
Then connect from the web, create the connection, close the browser. Connect again by web and get /usr/NX/var/log/nxserver.log