You can safely ignore the rest.įirst we need to make sure that the correct network connection or “adapter” is selected. We’re going to pay attention to only the two items in Adapter Settings. I know it looks a little intimidating, but don’t worry. MTU is buried in the registry, but rather than edit the registry directly, there’s a small program you can download for free that will allow you to view and change the MTU settings: DrTCP. Download and run the latest version, and you should see something like this: I’ll describe it in a little more detail in a second, but first if you’re having a problem, let’s look at your current setting, and perhaps try tweaking it.
The issue is an obscure setting called “MTU”, which stands for Maximum Transmission Unit, in the network configuration.
It’s very obscure, but the good news is that it might also resolve some other problems, most commonly problems with instant messaging. However, since that article was written, an additional reason for some web sites not being accessible has surfaced that’s worth looking into in a little more detail. I’d certainly recommend that as a starting point. I touched on several possibilities for this in a previous article: Why can I not access certain web sites?.
