well that is ok routers are tricky and no 2 are the same.
from the abstract yes.
first off you said IP, but that is a WWAN IP not in the home
a reset router turns off (i look first) wwan IP pings, and the the firewall in the router is fully up and no ports open.
wps off and pin off, use real credentials with
complex pw or it will be hacked, from curb or hood folks near by are they?
the manual for your router is free to read 24/7
do not enable
remote access to router ,means outside home)
no
ad hoc wifi turned on, no
guest networks
only 1 network, and use YOUR SSID, so you know this.
and use no
wep mode ., only WPA1,2 and 3 or wpa2 up. only
then use a hard password, or you will get hacked unless rural.?
learn now to scan test your wwan.
there are many test sites to do that, shieldsup is one.
if that test passes, then local wifi is a mess. and told here.
but wifi side is the hard one.( bad neighbors?)
yes techy but must pass. the tests. it is your wwlan firewall tests..
https://www.grc.com/shieldsup
make sure all pCs have firewall active.
if using shares, I don;t full time but my video server is read only just in case.