Generally speaking various PMTU, ICMP, and MTU issues are a significant problem. My experience has been it's much worse with UDP than TCP as broken and/or misconfigured devices seem to cause more problems with UDP fragments than TCP fragments (which do generally work). I talk about this quite a bit here: http://blog.krisk.org/2013/09/apples-new-facetime-sip-perspective.html On Tue, Feb 18, 2014 at 3:25 PM, Brian West <brian@freeswitch.org> wrote:
I want to open a discussion on this topic, I'm sure many of you fine freeswitchers have encountered the pain of exceeding the MTU and things not handling it properly. I've also see this mindset that blocking all ICMP will somehow make your network more secure, In doing this you're actually breaking PMTU and the internet in general. So check your firewalls, if you're blocking repent now and fix it... Input and discussions would be welcome on this topic.
I think this issue is more of an issue facing residential installs vs commercial installs... What have you seen?
-- Brian West brian@freeswitch.org FreeSWITCH Solutions, LLC PO BOX 2531 Brookfield, WI 53008-2531 Twitter: @FreeSWITCH , @briankwest http://www.freeswitchbook.com http://www.freeswitchcookbook.com
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