ftp server behind nat

  I. Nat encyclopedia content: NAT (Network Address Translation) is a conversion technology that converts private (retained) addresses into valid IP addresses. It not only perfectly solves the problem of insufficient lpv4 addresses, it can also

Turn from: http://www.cnblogs.com/GO-NO-1/p/7241556.html 1, NAT (network address Translator) Introduction NAT has two broad categories, basic NAT and NAPT. 1.1. Basic NAT Static NAT: A public IP corresponding to an internal IP, one-to-one

As Internet technology continues to grow exponentially, the allocation of precious network addresses to private networks is finally seen as a waste of valuable virtual real estate. Therefore, the Network Address Translation (NAT) standard is used to

Meaning of NAT traversal: Nat is designed to save IP addresses, but it hides the addresses of Intranet machines. "unexpected" plays a role in security. Invisible to the outside, non-transparent internal networks are also "fair" applications of

NAT (Network Address Translation) is a process of converting an IP address in the IP datagram header to another IP address. In practical applications, Nat is mainly used to enable private networks to access public networks. By using a small number

With the development of Internet technology, the precious network address allocation to private network has been regarded as a waste of precious virtual real estate. Therefore, the network address translation (NAT) standard appears, that is, to

Control CHannel: the control channel is used to communicate with the FTP server. The control channel is used to connect to FTP and send FTP commands. Data Channel: data channel is a channel for file transfer or list with the FTP server. You may ask

What is FTP?FTP is the abbreviation for the file Transfer Protocol files Transfer Protocol.What is the FTP port number?21stCan I change the port number of FTP?YesWhat is the difference between port number 20 and 21 for FTP?One is the data port, one

Today, there is a problem: the system developed by the company, after the customer room on-line, because the FTP server can not directly hook up on the outside of the network, you must pass the NAT mapping on the router.Suppose our router extranet

Many protocol control information is included in the application layer data, this information directly affects the establishment of the link, such as FTP protocol, FTP is divided into port mode and pass mode, port mode, the first client Connection