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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I have a product using Linux 2.6.27.9 and OpenSwan 2.6.23, I can create tunnel just fine, I can see with tcpdump that I have ESP packet, etc.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>However, sometimes, if the tunnel is not properly “deleted” from the server from one reason or another, some socket connections from the client to the server kind of “freeze”, even a simple 1 packet ping freeze and never come back.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>In our application I set the socket as non blocking to try to prevent it, but it changes nothing, when this happen, the call to send() block, until the tunnel is re-establish.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>When the tunnel is re-established, the ping comes back with some stats like:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>1 packets transmitted, 1 packets received, 0% packet loss<o:p></o:p></p><p class=MsoNormal>round-trip min/avg/max = 420815.549/420815.549/420815.549 ms<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Is it a bug in the kernel? IPSec? Others?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks in advance!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Frédéric.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>