[5]Ignore any rumors about your network administrator occasionally
Chapter 9: Internet Connections You have a cable. If you can connect through it, victory is yours. In this chapter, we’ll discuss the basics of hooking up to the Internet through two very common methods: dial-up and Ethernet. OpenBSD supports other methods of network connections, such as PPP over Ethernet, but these two are by far the most common and the other connection methods use concepts and ideas common to dial-up and Ethernet. If you understand these tools, other connection methods will not be hard. Dial-up Internet Connections Many people, and quite a few small businesses, access the Internet via dial-up connections. This is still an easy and inexpensive way to get Internet access. OpenBSD’s dial-up network support can handle a wide variety of situations, including dial-on-command, dial-on-demand, and dedicated lines, over a wide variety of protocols. OpenBSD supports the dial-up methods Serial Line Internet Protocol (SLIP) and Point-to-Point Protocol. PPP is the standard used to connect to the Internet via dial-up almost everywhere, so we’ll cover that. It’s a fairly simple protocol; the connection has two ends, and anything you push into one end of the connection is sent to the other end. If you need SLIP support, take a look at sliplogin(8). Before you even start trying to configure PPP, be certain that you have all of the necessary information at hand. Your ISP can provide you with each of the following. . Dial-up username . Password . ISP’s modem bank phone number I always recommend checking the phone line before trying to configure PPP. Pick up the phone and, if you don’t have a dial tone, get one. If you have a dial tone, dial your ISP’s modem pool. You should hear the modem bank answer with a high-pitched squeal. Just confirming that the phone number actually reaches the modem bank can save you some headaches later if your connection doesn’t work. More than once I’ve learned that I needed to add the area code to a dial-up phone number to actually connect, or put a 1 in front of the number, or something. If you’re in an office setting, you should also confirm that you have an analog phone line. Some offices have digital phone systems that are simply not compatible with modems, under any operating system. Modems You also need a modem. Many internal modems are actually software modems, also known as Winmodems. These modems do much of the work required for dial-up in proprietary software that is only widely available for the Windows platform. Most internal modems are software modems. Winmodems generally show up in dmesg somewhat like this. “Intel 82801CA/CAM Modem” rev 0×01 at pci0 dev 31 function 6 not configured Note the “not configured” statement. If it’s a Winmodem, it will not work with OpenBSD. OpenBSD only supports hardware modems, which have actual communications chips to handle communications instead of relying on software. All external modems are hardware modems. If your internal modem is a hardware modem, you’ll see an entry in /var/run/dmesg.boot identifying it as a modem but without the “not configured” statement. If it’s a hardware modem, OpenBSD will almost certainly recognize and configure it automatically at boot. If you have a burning desire for an internal hardware modem, many online vendors sell them, and you can pick them up used at various auction sites. Configuring PPP Page 178
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