If by any chance, you followed the guide exactly but it failed to work for you, here all couple of commands that might help you see what went wrong.

Is DNS up and running?

ps | grep dns

you should see dnsmasq is running. If not; on webbrwoser go to your router's page; navigate to log page and keep and eye of it while you run following command on command line

service restart_dnsmasq

on log page, you should see an error message and explanation of what went wrong.

Did iptable rules worked as expected:

In command line of your router, execute:

iptables -t nat -nvL

Under "Chain PREROUTING" you must have following entry:

0 0 REDIRECT tcp -- * * 192.168.1.50 0.0.0.0/0 tcp dpt:80 redir ports 8888

Under ""Chain OUTPUT" you must have following entry:

0 0 REDIRECT tcp -- * * 192.168.1.50 0.0.0.0/0 tcp dpt:80 redir ports 8888

if not, then check on nat-start file, see if you have right command in it. Also check on its permission.

Is ps4-exploit-host running?

On command line do:

ps | grep start

you should have something like:

715 admin 33464 S python3 /mnt/1G/ps4-exploit-host/start.py

If not, check on "services-start" file. Make sure to not miss "&" at the end of added line.

Router's GUI page does not work!

On command line do:

netstat -nl

You must see followings:

tcp 0 0 127.0.0.1:80 0.0.0.0:* LISTEN

tcp 0 0 192.168.1.1:80 0.0.0.0:* LISTEN

tcp 0 0 127.0.0.1:53 0.0.0.0:* LISTEN

tcp 0 0 192.168.1.1:53 0.0.0.0:* LISTEN

tcp 0 0 192.168.1.1:8888 0.0.0.0:* LISTEN