What is a redirect in networking?
An ICMP redirect message is an out-of-band message that is designed to inform a host of a more optimal route through a network, but possibly used maliciously for attacks that redirect traffic to a specific system.
What is ICMP redirect used for?
ICMP Redirect messages are used to make the process of routing more efficient. Consider there are two routers in a network segment. One router is the default gateway for the network segment and another router has better path to a particular destination network/host.
What causes a router to send an ICMP redirect packet back to a host?
The ICMP redirect message indicates that the gateway to which the host sent the datagram is no longer the best gateway to reach the net in question. The gateway will have forwarded the datagram, but the host should revise its routing table to have a different immediate address for this net.
What is IP redirect in Cisco?
Redirects happen when a router recognizes a packet arriving on an interface and the best route is out that same interface. In that case the router sends an icmp redirect back to the source telling them about a better router on the same subnet.
What is Proxy ARP Cisco?
Proxy ARP is a technique by which a proxy server on a given network answers the Address Resolution Protocol (ARP) queries for an IP address that is not on that network. The proxy is aware of the location of the traffic’s destination and offers its own MAC address as the (ostensibly final) destination.
What is no ip route cache?
The cache has the destination IP address, the next-hop information, and the data link header information that needs to be added to. the packet before forwarding . Future packets to the same destination address match the cache entry, so it takes the router less time to process and forward the packet.
Should I use proxy ARP?
Network without a default gateway Proxy ARP can be used in a network where clients placed on different physical networks are configured as if they are all on the same subnet. It can be used to create a subnetting effect without changing the network configuration of the devices.
What does no ip Proxy ARP mean?