First, the Layer Two Tunneling Protocol L2TP and IPSec IP security is a Layer Two Tunneling Protocol PPTP and L2TP L2F Layer Two Forwarding combination of technology, which is made by Cisco, the tunneling technology. In order to avoid both PPTP and L2F tunneling incompatible competing in the market which caused confusion to users, bringing convenient, IETF requires two technologies combined in a single tunnel protocol, and blend in the agreement and PPTP L2F the advantages of both, which results in L2TP. For L2TP protocol standards see RFC 2661. L2TP, PPP frames will be packaged, through IP, X.25, Frame Relay or ATM, network transmission. Only defines IP-based network L2TP. In the IP network using User Datagram Protocol L2TP UDP encapsulation and transmission of PPP frames. L2TP tunneling protocol can be used for Internet, other companies can also be used in the private Intranet.
After installing the operating system, preferably in managed to complete before the patch was installed, configured the network, to determine if it is installed on the 2000 SP4, if it is 2003, it is best to install the SP1, and then click Start ] Windows update , install all critical updates. Although antivirus software can not solve the problem sometimes, but anti-virus software to avoid many problems. Do not expect to kill all Trojan antivirus software, because the ASP of Trojans can be avoided through some means of killing anti-virus software. Server Hacking measures are, even if your server is not IIS, these security measures are the best cook. This is a Ah Jiangs blind spot, probably knew the port with the Local Security Policy screen, but the Raiders in this area a lot of things online, we can find out on a later date, or I will copy some to my website.