Just for information.
My zeroshell machine run on virtual environment.
I have installed this kernel 3.18.11 with needed package 40310 Firmware and Microcode Network Interfaces, CPU and other devices 1.1.
Get problem with captive portal. Several pc didn’t get response from it or one time on tree with connection reset and hang up.
Get back to 64-Bit Kernel 3.14.29 without 40310 and all run fine again.