@dstacey147 said in Slow Speed between subnets in one direction only:

I know that explaining an issue to someone else often makes you realize yourself what you haven't checked

QFT!!! That is quite often the case for sure!! I see it all the time on troubleshooting calls..

Laying out the details, and having to go through what you have done - quite often pops something into your head, oh shit I didn't check that or this..

Glad you got it sorted..

@qbhatti said in Pihole as secondary dns:

blocks some google ads so it means I cant click on shopping items or sponsored items when searching.

Seems like a problem of the ad blocking list your are using in Pihole.
You could try a safe one like OISD Basic that has no false positives.