Recent and colleagues to talk together, that is always bound to a local area network has some users like to use ARP address spoofing to tampering, you do not let him go online, he can find a variety of reasons to fight for his "rights" of the Internet, and that such persons are often hidden in a segment, the total can not be because he's a person engage others are not network on, so really if you encounter such a nasty primary, it is in his local area network for a change on the Internet, not a post is directly connected to the gateway, but let the LAN users online which is executed once before the PPPOE dial-up process to obtain IP address and gateway address, which fundamentally eliminate the occurrence of ARP address spoofing.
Linux with PPPOE server experience prior to this, we have system introduced with routeros software to set up PPPOE server, the overall sensation is very powerful, and easier implementation (I and my colleagues to exchange a bit, in general have computer network infrastructure, a successful configuration operation, you can configure PPPOE server independently), but there is an inescapable reality: PPPOE server is commercial software, the price, the next beta and practiced hand can also, if you want a formal application to the actual network for real server does not rely on the spectrum, we turn our attention to Linux systems, the LINUX system is certainly can do PPPOE server, in fact, it took an afternoon Xiangzi time in Linux the PPPOE server configuration was successful, but I still have some feelings to say something: a, LINUX has had numerous versions of the configuration commands, and PPPOE software without providing an authoritative official configuration tutorials, online distribution of PPPOE tutorial diverging beginner difficulty according to a tutorial on master the essentials of PPPOE Configuration. Second, after all, is a general purpose LINUX operating system, rather than as designed for PPPOE server design, configure PPPOE server, sometimes a little LINUX itself small detail settings influence the improper PPPOE server itself by setting (such as Xiangzi this time Linux two network cards a restart is disconnected from the network header, good pain at the time of the adoption of the configuration file solved). 3. LINUX system itself integrated network services should be a trend, that is, a single LINUX Server installed, and a variety of network services and the corresponding packed, to sometimes will enable you to streamline operations and enhance consumer interests, thereby enhancing the LINUX in the server operating system usage. Felt said so much, or to introduce this in the LINUX system by the process of configuring PPPOE server, I was this selection LINUX6.0 Desktop Edition red flag, installed in the virtual machine, virtual, the two network cards using PPPOE + IPTABLES (NAT) Internet access solution, is divided into three parts to introduce the configuration process. Network topology shown in Figure 1, Figure 1 shows the use of LINUX as a PPPOE server and use the routeros for PPPOE server on the network topology is no different, we use this is Eth1 network connections outside the network (for which to set the IP address, subnet mask, gateway: 10.70.10.15/255.255.0.010.70.0.1), Eth0 network card connected to the intranet (for security reasons, do not set the IP address and other information).
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