Wireshark-users: Re: [Wireshark-users] tcpdump
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From: Guy Harris <guy@xxxxxxxxxxxx>
Date: Sat, 19 Jun 2010 19:08:53 -0700
On Jun 19, 2010, at 6:51 PM, Andrew Hood wrote:

> This is pretty much the behaviour we see when ICMP Frag Required packets
> are being blocked. Multiple retransmits of packets followed by an RST.

I.e., path MTU discovery:

	http://en.wikipedia.org/wiki/Path_MTU_discovery

isn't working, because the feedback it depends on (the Fragmentation Required messages) aren't getting through to the sender.