[hddherman]

Do you use your own router behind the box provided by the ISP? And is it DOCSIS?

If so, using the ISP-provided box in bridge mode could help. This was the cause of many woes in my setup, whenever there were a lot of connections open, the internet connectivity would drop off. But once I changed the ISP-provided box to be a dumb bridge between the internet and my own router, this stopped being an issue.

[xuki]

Yeah, always bridge the ISP box if possible. Get an EdgeRouter or run a decent router with OpenWRT or run pfSense/OPNSense on a spare x86 machine, those should be plenty fast for moderate usage.

[adam-a]

I was just using the ISP router on its own. Any recommendations for a good router?

[hddherman]

If you're into tinkering, then anything that has good-enough specs and has great openWRT support is a safe bet. Personally I use a TP-Link Archer C7 v5, but there might be better options out there by now.