Linux Firewall camouflage against hacker attacks

Make sure your Modem card, anger can be used to set the COM1, COM2, COM3 and COM4, as a result, these data card to work properly on Linux.

You can find in http://www.o2.net/~gromitkc/winmodem.html Linux-compatible data card for a complete list. When the author in writing this article, I took the time to test different kinds of data cards. Linux supports Plug and Play device, so I bought a piece by Amjet production non-hopping data card, then find another disturbing problem. Author test PC is an old 486, with is the AMIBIOS 1994 edition. In the plug this plug data card, the computer will not turn on, appears on the screen is the primary hard disk failure "(Primaryharddiskfailure). The inspection found the plug and Play BIOS that will be reserved for the hard disk controller, interrupt, rationing a data card. Finally the author gave up on your old computer with a plug and play products, because it is not worth the time spent for these things. Therefore, please note the purchase data card, look for COM1 to COM4 by adjusting the anger. In the author's Bulletin Board (http://trevormarshall.com/byte/), see a few friends asking whether you can use multiple dial-up lines to improve Internet access speeds. Here's the best example is the application, it also 128KISDN two 56K channel to reach speeds of 128 k. When the ISP provides this service, we will configure two separate lines connected to the same IP. You can see, while Linux has EQL such modules that allow you to use the computer at the same time, the two pieces of data card unless your ISP dial-up connections to two groups with the same IP, or two pieces of data card only to send out information helpful. If you dialed is General ISPPPP line, then you will get an IP address from the server return the packet can be found in millions of computers; but you each time you dial in to the ISP, will receive a different IP address. Your browser is sending out packets, also contains information for the server to return the local IP address. EQL can use these outside of packets, dispersed to different ISP line, but when the information feedback, but can only receive through an IP address, the browser that is using that address. If you use ISDN, the ISP will address this issue; some ISPs will be more than one set of lines of dial-up access provides the appropriate IP address, but the price is very expensive. In the pursuit of speed, please don't ignore a Linux firewall. In the author's Office has six users via an IP masquerading firewall to access a 56K analog modems that work very well, only if someone downloading large files speed will be slower. When you decide to install multiple ISP dial-up line, ahead of the erection of a Department "IP masquerading" server a try. Windows handle multiple IP approach is not very efficient, and the Windows network and separated from the modem, the effectiveness of the promotion will keep you amazed. In short, Linux is used by the "IP masquerading" method, is to hide your IP, do not let others on the network.