The TCP/IP Guide - ICMPv4 Destination Unreachable Messages
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… Destination Host Unreachable - LinuxQuestions.org Jul 28, 2008
Disabling unreachables breaks PMTUD - PacketLife.net
ICMP type 3, Destination unreachable message The ICMP destination unreachable message is generated by a router to inform the source host that the destination unicast address is unreachable. The IP header plus the first 8 bytes of the original datagram's data is returned to the sender. ICMP - Destination Unreachable Message Analysis
The ICMP destination unreachable message is generated by a router to inform the source host that the destination unicast address is unreachable. The IP header plus the first 8 bytes of the original datagram's data is returned to the sender.
ICMP Host Unreachable from gateway - Sun: Solaris - Tek-Tips Jan 16, 2009 Destination Host Unreachable – Reasons and Fixes – HeelpBook When the packet is received by remote gateway but it failed to find remote host, you will receive ICMP Echo Destination Host Unreachable message. NOTE: If your local address is returned as 169.254.y.z, you have been assigned an IP address by the Automatic Private … ICMP host mysystem unreachable - admin prohibited - Red