ICMP Redirects Send and Accept are by default enabled on most of the linux flavours including Debian, Ubuntu, Redhat Enterprise Linux, Suse Linux.
Tag: ICMP-redirects
ICMP Redirect messages from a gateway router
ICMP Redirect is a type 5 ICMP error message sent by a gateway router to a sending host informing of an optimal alternate route to the destination host and to update its routing table with the new host route to the target destination host. The router forwards the original packet to the next hop router or to the destination host and sends the ICMP Redirect message to the sending host so that the subsequent packets to the destination host can be sent via the new route.