<div dir="ltr"><div><a href="http://shouldiblockicmp.com/">http://shouldiblockicmp.com/</a> share with your friends! Great resource<br></div><div><br></div><div>Regards,</div><div><br><div class="gmail_quote"><div dir="ltr">On Wed, Sep 14, 2016 at 9:55 AM Mark Newton <<a href="mailto:newton@atdot.dotat.org">newton@atdot.dotat.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">On Sep 14, 2016, at 12:34 AM, <a href="mailto:s.s.o.n.i.k+a.u.s.n.o.g@gmail.com" target="_blank">s.s.o.n.i.k+a.u.s.n.o.g@gmail.com</a> wrote:<br></div><div style="word-wrap:break-word"><div><blockquote type="cite"><span style="font-family:Calibri,sans-serif;font-size:11pt">Client firewall MTU set to 1484: Successful reply at length 1456. Unsuccessful at 1457, however echo request is seen, and unreachable 3:4 message is returned by firewall, but never arrives at the source.</span><br></blockquote><div><br></div></div></div><div style="word-wrap:break-word"><div>Ethernet firewall? Why is the MTU so low?</div><div><br></div><div>These problems are virtually always caused by a firewall blocking ICMP. Usually it’s a firewall operated by the person who is complaining about PMTUD not working :-)</div></div><div style="word-wrap:break-word"><div><br></div><div> - mark</div><div><br></div><div><br></div></div>_______________________________________________<br>
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