port forwarding

(redirected from port mapping)

port forwarding

Also called "port mapping," port forwarding is directing traffic from the outside world to the appropriate server inside a local TCP/IP network. Internet services are identified by a standard port number; for example, Web traffic uses port number 80. If the local network hosts a Web server that is accessible on the public Internet, the port forwarding panel in the router would be configured to direct Web/HTTP packets (port 80 traffic) to the IP address of the Web server in the local network (LAN). See TCP/IP port.

Ports are "opened" and "closed" in the firewall, which determines which types of traffic are allowed in or out. In a company, stand-alone commercial firewalls are used. In the home and small business, the firewall is built into the wireless router. For more details, see opening a port. See firewall, wireless router and port triggering.


Forward Web Traffic
If a company hosts its own website, the router adds the IP address of the Web server to all incoming port 80 packets (HTTP packets) from the Internet.







Forward Voice Over IP (VoIP) Traffic
Many companies use the Internet and their local network for telephone service. Because the outside world can "phone in" to the network, those packets must be directed to the company's digital PBX, which uses the SIP protocol. Depending on VoIP provider, the SIP port numbers vary. See SIP and SIP provider.
References in periodicals archive ?
curl, wget, etc.) on their laptops to run remote commands on containers without complex port mapping and having to run Docker exec commands.
* A sophisticated enclosure system that can streamline complex ingress and egress fiber port mapping for interconnect intensive technologies, including mesh networks, wavelength selective switching, and software defined networking / network function virtualization topologies.
myQNAPcloud service simplifies the steps of host name registration, mapping of the Dynamic NVR IP to a domain name, and auto port mapping of UPnP routers on the local network.
The advanced application programming interface (API), which is available on the other Fujitsu transceivers, minimizes factory calibration time, provides flexible port mapping and adds monitoring of customized key performance indicators (KPIs).
Zultys' network and phone systems now has session border controller and port mapping that provides improved security.
-- up to a 75 percent reduction in standard deviation from end-to-end message latency; -- a lower cost of administration through self-managing protocols and centralized management that enables intelligent network utilization such as subject-based multicast mapping and service port mapping; -- greater reliability for the most demanding applications in 24x7 environments including end-to-end protection from transmission failures; and -- increased throughput, with additional support for more InfiniBand and 10 Gigabit Ethernet vendors.
Finally, if the computers are behind a firewall/router, you may have to enable port mapping to the VPN server's IP address.
Routing features include network address translation, configurable PAP and CHAP authentication, port mapping and a DHCP server.--Digicom Systems
The new features include Ethernet port mapping, Authentication Services and support for 802.1Q packet tagging.