The nerve roots pass through these joints to go from the spinal cord to the arms, legs and other parts of the body. These joints also allow the spine to bend and twist, and they keep the back from slipping too far forward or twisting without limits.
A forward ftp proxy is used to allow internal LAN clients to connect to Internet ftp servers when connecting through a PF firewall. All control and data connection rules are made by the ftp-proxy daemon and inserted into PF using anchors.
FTP is a reliable, connection-oriented service that uses TCP to transfer files between systems that support. FTP. The main purpose of FTP is to transfer files from one computer to another by copying and moving. files from servers to clients, and from clients to servers. When files are copied from a server, FTP first. establishes a control connection (port 21) between the client and the server.