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votes
Internet is slow, but only when opening a new domain
Internet in my fiancee's house is weird. Once I open up a domain, going to links in the same domain is quite fast, but if I try opening another domain in another tab it is super slow. On Chrome it is really bad, Firefox is better but still sluggish. This occurs similarly on different devices running Windows, Linux, and Android. What could be causing this?
Your post is hinting at the DNS configuration in your router. Are you able to change it? If it's set to your ISPs DNS servers and your isp isn't a particularly good one, this could be it.
Are you able to reproduce the issue on other people's networks?
Yeah, I have access to the router. I just have to figure out how to access it, the interface, etc.
When I use my smartphone, tablet, and laptop on my house, the issue does not occur.
192.168.0.1 or 192.168.1.1 will usually do it. Google the router's model name, or your ISP's name, there's lots of communities that have help and wiki articles for all kinds of variations.
"Change DNS [isp name]" should be fruitful. If you do change it, try 1.1.1.1 and 1.0.0.1 as the DNS servers to use instead.
This might be something that the ISP would have to look at, but assuming that's not an option, might want to narrow down if it's the modem, the router, or the wireless if they're not all the same device. Power Cycle everything is always a pretty good option, maybe check if there are some weird cache settings, or do a factory reset if it's something your comfortable with and/or can easily do.