Dual-homed
Dual-homed or dual-homing can refer to either an Ethernet device that has more than one network interface, for redundancy purposes, or in firewall technology, one of the firewall architectures for implementing preventive security.
An example of dual-homed devices are
Usage
In Ethernet LANs, dual-homing is a network topology whereby a networked device is built with more than one network interface. Each interface or port is connected to the network, but only one connection is active at a time. The other connection is activated only if the primary connection fails. Traffic is quickly rerouted to the backup connection in the event of link failure. This feature was designed to provide telecommunications grade reliability and redundancy to Ethernet networks.[1] Multihoming is a more general category, referring to a device having more than one network connection.
In firewalls
Firewall dual-homing provides the first-line defense and protection technology for keeping untrusted bodies from compromising information security by violating trusted network space.
A dual-homed host (or dual-homed gateway, firewalls, or any server that provides secured applications or services directly to an untrusted network.
Dual-homed hosts can be seen as a special case of
Dual-homed hosts can act as firewalls provided that they do not forward IP datagrams unconditionally.[4]
Other firewall architectures include the network-layer firewall types screening router, screened-host,[5] and screened subnet.
See also
References
- ^ "Dual-homing: resilience up to the network's edge". The Industrial Ethernet Book. Retrieved 2014-01-10.
- ^ Hui Pan. "Fiber Optics Glossary Of Terms". Fiber Optics Weekly Update.
- ^ "What are the basic types of firewalls?". vesaria.com. Vesaria, LLC. Archived from the original on 2016-03-03.
- PC Magazine.
- ^ "Dual-homed gateway firewall". AS/400 Glossary. IBM.[dead link]