Network FAQs

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What network settings should I use?

Almost everyone on campus should be using DHCP to automatically assign an address to their computer. Make sure that any entries labeled "nameserver" or "DNS" are left blank; DHCP will automatically fill in these fields. Fields labeled "search domains" or the like should similarly be left blank. There is no need to adjust more advanced settings such as MTU or link speed/duplex; these will be automatically negotiated with our network by your machine.

Why is the network slow?

There are many answers to this question, and the answer can change in different circumstances. One possibility is that a large majority of the Oberlin population is trying to use the network at the same time you are, so everyone is fighting for our bandwidth.

Another possibility is remote congestion. The site you are trying to access may be at the limits of its own bandwidth, and therefore not able to talk to Oberlin quickly even though we have plenty of bandwidth locally.

If you are using wireless it's important to understand that speeds may go up and down very dramatically, even if you remain stationary; this is the nature of a wireless connection. Receiving a wireless signal is very similar to receiving a radio station, in that it is affected to a greater or lesser degree by everything in the path between you and the base station.

Why doesn't my online game work?

While we try and make sure that online gaming does work, especially from Resnet, many games use many different methods of connection to the internet and our packet shaper may not yet be aware of your game. Sending detailed information to (what port, TCP or UDP, are you connecting to a specific server) can assist us in making gaming work for you. More here.

Are we blocking port xxx?

Maybe. If you need another port open for some reason, send a request to and CIT will consider those requests on an individual basis.