Hi,
I find that if you I into the router’s luci page at http://router_ip/cgi-bin/luci/admin/system/system and turn on or turn off the NTP client, that once you do that, lighttpd becomes non-responsive until it is restarted.
Even if you try to connect to it directly as below, you see the following immediate disconnection:
$ telnet 192.168.16.1 80
Trying 192.168.16.1…
Connected to 192.168.16.1.
Escape character is ‘^]’.
Connection closed by foreign host.