Icmp host unreachable

ICMP Destination Unreachable (Host administratively

Address Unreachable. There was a problem attempting to deliver the datagram to the host specified in the destination address. This code is equivalent to the ICMPv4 “Host Unreachable” code and usually means the destination address was bad or there was a problem with resolving it into a layer two address. 4. Port Unreachable Why disabling ICMP unreachables is a bad thing Nov 22, 2009 Pinging computers on local network: destination host "Host unreachable" means that the kernel can't decide which adapter to use to send the packet so it gives up and drops the packet. The Metric for your local network is 9. That ought to be 0 or 1. However the Linux kernel is rumoured to ignore the metric. I would try to add a route to the specific host…

ICMP Unreachable - Engineer Life

Address Unreachable. There was a problem attempting to deliver the datagram to the host specified in the destination address. This code is equivalent to the ICMPv4 “Host Unreachable” code and usually means the destination address was bad or there was a problem with resolving it into a layer two address. 4. Port Unreachable

Internet Control Message Protocol (ICMP) Parameters

As I understand it, "request timeout" means the ICMP packet reached from one host to the other host but the reply could not reach the requesting host. There may be more packet loss or some physical issue. "destination host unreachable" means there is no proper route defined between two hosts. linux - What -A INPUT -j REJECT --reject-with icmp-host