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udp client: destination port unreachable question

843790Jun 2 2007 — edited Jun 2 2007

Hello,
I used "trivial" UDPClient / Server example to send datagrams from one local interface (eth1) on my Linux box to Datagram server on yhe host not included into local routing table and I tried to capture outgoing udp traffic on interface eth1. I've got IOException
"ICMP: destination unreachable" and I only could capture outgoing
packets on loopback interface ( with Ethereal). Can someone help to
resolve my confusion: I thought UDP is "connectionless", e.g. will be
sent regardless. What does ICMP have to do with it and why does this
traffic appear on loopback interface?
Thank you,

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Locked on Jun 30 2007

Added on Jun 2 2007

#networking

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