ICMP redirects are used by routers to specify better routing paths out of one network, based on the host choice, so basically it affects the way packets are routed and destinations. Through ICMP redirects, a host can find out which networks can be accessed from within the local network, and which are the routers to be used for each such network.
Nov 23, 2019 ICMP - Fortinet ICMP messages are sent in several situations, for example: when a datagram cannot reach its destination, time exceeded messages; redirect messages; when the gateway does not have the buffering capacity to forward a datagram; when the gateway can direct the host to send traffic on a shorter route. Some of the specific ICMP message types are networking - Why do ICMP Redirect Host happen? - Server Fault At first blush, it looks like Debian is stretching the boundaries for sending an ICMP redirect; quoting RFC 792 (Internet Protocol). The gateway sends a redirect message to a host in the following situation. A gateway, G1, receives an internet datagram from a host on a network to which the gateway is attached. EXOS: how to disable icmp redirect | Extreme Networks Attaching a ACL on every L3 interface which discard icmp redirects is technically possible BUT not manageable in the field. BR icon. Best answer by OscarK 25 September 2019, 09:37 * X450G2-24t-G4.1 # disable icmp redirects Execute the command ipv6 IPv6 address family vlan vlan
Specifies that the IPv4 and IPv6 path caches are updated in response to ICMP redirect messages. This is the default value for both the IPv4 and IPv6 settings. false. Specifies that the IPv4 and IPv6 path caches are not updated in response to ICMP redirect messages.
icmp redirect공격을 XP로 시도한 모습, 명령어를 입력한 동시에 ICMP Redirect 패킷 하나가 XP를 향해 날아가며 이를 받은 XP에서는 처음에 변경한 10.10.10.0/24에 대한 경로 정보를 제거하였다. Network Analysis: Investigating ICMP Redirects | Network Sep 12, 2017 What does ICMP | Redirect | (redirect for host) mean
Manual:IP/Settings - MikroTik Wiki
no ip redirects--this disables icmp redirect messages. 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. Subsequent packets take the optimal path. ICMP type 5, Redirect - Network Sorcery ICMP Redirect is a mechanism for routers to convey routing information to hosts. Routers use other mechanisms to learn routing information, and therefore have no reason to obey redirects. Believing a redirect which contradicted the router's other information would likely create routing loops. ICMP redirects drop - Check Point