On 2017-2-9, at 8:39, otroan@xxxxxxxxxxxxx wrote: > > "Many network security devices block all ICMP messages for perceived > security benefits, including the errors that are necessary for the proper > operation of PMTUD. This can result in connections that complete the > TCP three-way handshake correctly, but then hang when data is transferred. > This state is referred to as a black hole connection. This is one significant > example of how PMTUD is broken on the Internet." Like it. Might be worthwhile to point at PLPMTUD as something that works, if the app/service meets its requirements. Lars
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