SLY router security & dns settings


TK Veteran
I know I've have read about these settings on here somewhere but for the life in me I cant recall the details or find the thread...
a friend has a zgemma h2s running atv 6.0 & has Sly bb as provider but is having trouble acessing nearly all the repositories within iptv player plugin so I presume her routers security needs to be lowered &/or her dns needs changing, does anyone know how to change these settings or better still point me in the right direction to the thread. ty