Socket Local IP binding

Use the Local Binding Address feature to control which local IP address is used by the system sockets. For example, in high availability systems where a standby host takes over the workload of a failed host. In this case, the standby host would be indistinguishable from the failed host. That is, the local IP address of the standby host uses the IP address of the failed host.

If no local binding is specified in the dialog box, then client sockets are not bound. The operating system assigns any valid IP address to the local end of a socket. Socket Local IP Binding, though, can control which IP address is used for the local end of each socket.

Capabilities are:

  • Client sockets can be made to originate from any valid IP address on the machine, giving the ability to get through firewalls.
  • Multiple servers can listen on the same port as long as they are bound to different local IP addresses.
  • This capability is available for Fileset FTP, HTTP Client, PDL-TCP/IP and TCP/IP.
  • PDL TCP/IP and TCP/IP have the further capability to permit local IP binding of server and multi-server sockets.
  • If no local binding is specified, then there is no local binding for clients and server sockets are bound to IN_ADDR_ANY.
  • The local binding can be specified as an IP address or a resolvable host name.