historically there was an applet that ran in your browser but nowadays this is
considered deprecated so there are some other possibilities left to get connected to dn42:

1: type "telnet dl.nop.hu" in a terminal

2: download rtr.jar and online-sw.txt and type "java -jar rtr.jar routercw online-" in a terminal

3: ftelnet is a 3rd party webapp that connects you

freeRouter nop.hu