When you link a network to the Internet there are many serious implications for network security. Network Firewalls effectively isolate an organisation's internal network structure from an exterior network like the Internet. Firewalls can screen IP addresses to prevent all but known addresses across the network. At this point the application can read and write to the socket connection to the firewall and the firewall daemon will simply act as a bridge between local and external hosts.
Description Closes a firewall connection.
After a connection is made successfully the application can read and write to the socket and the firewall server simply acts as a bridge between the local and external hosts. If the function succeeds it will return 0. In case of any error it will return any one of the folowing error values. The function is a non-blocking call and returns immediately issuing a BIND request. The BIND request is used in protocols which require the client to accept connections from the server.