Jun 28, 2012 · The response "Reply from 10.10.10.20: Destination host unreachable." actually is the correct one. When pinging a host on your own subnet the sender will first send an ARP request for the MAC address of the associated IP address.
Mar 12, 2018 Destination Host Unreachable - over bridge with static IP Oct 14, 2014 How to Fix This Destination Host Unreachable May 01, 2020
ICMP Destination Unreachable (Type 3) Flood | MazeBolt
Solved: IP unreachables ? - Cisco Community Icmp’s unreachable packets are used when a destination to a specific network, host, protocol, or port is unreachable. The router or host may send a destination unreachable packet to inform its source of the ip packets destinations unavailability. no ip unreachables - Cisco Community
Notice that the type is set to 3 (Destination Unreachable), and in this case the code is 1 (Host Unreachable). Notice that the original packet (an ICMP Echo in this case) has been included in the data area of the ICMP message.
Destination Unreachable uses several code values to further describe the function of the ICMP message being sent. Each code type describes a different delivery problem encountered, as shown here: Figure 3.11 This is an ICMP echo reply message sent in response to a previously received echo request. Ping 192.168.56.101 from the host is OK though. I try to gain some hints by capturing packets on the VirualBox-Host-Only-Network adapter with wireshark. And I see some ICMP packets sent from 192.168.56.101 to 192.168.56.1 which tell me "Destination unreachable (Host administratively prohibited)". ICMP Destination Unreachable (Type 3) Flood. ICMP Floods are DDoS attacks aimed at consuming computing power and saturating bandwidth. ICMP Floods are generally spoofed attacks and normally come at a very high rate. Time Exceeded ICMP Floods, if not dropped by DDoS mitigation devices on the perimeter, may overwhelm the internal network