The strongest simulator of Unetlab network associates Secucrt
Here are some tips on how to associate Secucrt with web interface management.
In the CRT global options, web browsers, default URL handling, all three are selected.
Tips:
Q: every time you click on the web interface, a separate window pops up, which is annoying. Can you manage all of them in one window, as simple as GNS3?
A: yes.
When you slide the mouse over the device, the port number will be displayed. Just log in to that port number with Secucrt.