Mailicous icmp type 3 code 3
A specific and technical question!
ICMP Type 3, Code 3 is a specific error message in the Internet Control Message Protocol (ICMP). Here's what it means:
ICMP Type 3: This is an "Error" message type, which is used to report errors or issues with IP packets.
Code 3: This is a specific error code within Type 3, which corresponds to "Destination Unreachable".
Destination Unreachable: This error code indicates that the destination host or network is unreachable. This can occur for various reasons, such as:
- The destination host or network is down or not responding.
- The packet was sent to a non-existent or invalid IP address.
- The packet was sent to a network that is not reachable (e.g., due to a firewall or routing issue).
When an ICMP Type 3, Code 3 message is received, it typically indicates that the packet being sent cannot be delivered to its intended destination. The sending device (e.g., a router or a host) will typically discard the packet and send an ICMP error message back to the sender, indicating the reason for the failure.
In summary, ICMP Type 3, Code 3 is an error message that indicates a destination is unreachable, which can occur due to various reasons such as a down or non-existent host, invalid IP address, or unreachable network.