<html><head></head><body lang="en-GB" style="background-color: rgb(255, 255, 255); line-height: initial;"> <div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">You can use fragmentation=yes option in your server side configuration file and authentication request/responce will be fragmented before forming ip packets.</div> <div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><br style="display:initial"></div> <div style="font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">Anvar Kuchkartaev <br>anvar@anvartay.com </div> <table width="100%" style="background-color:white;border-spacing:0px;"> <tbody><tr><td colspan="2" style="font-size: initial; text-align: initial; background-color: rgb(255, 255, 255);"> <div style="border-style: solid none none; border-top-color: rgb(181, 196, 223); border-top-width: 1pt; padding: 3pt 0in 0in; font-family: Tahoma, 'BB Alpha Sans', 'Slate Pro'; font-size: 10pt;"> <div><b>From: </b>Олег Пруц</div><div><b>Sent: </b>sábado, 23 de septiembre de 2017 05:09 p.m.</div><div><b>To: </b>users@lists.strongswan.org</div><div><b>Subject: </b>[strongSwan] Cannot connect to IPsec gateway in a roadwarrior scenario because of large packet lengths</div></div></td></tr></tbody></table><div style="border-style: solid none none; border-top-color: rgb(186, 188, 209); border-top-width: 1pt; font-size: initial; text-align: initial; background-color: rgb(255, 255, 255);"></div><br><div id="_originalContent" style=""><div dir="ltr"><div class="gmail_default" style="font-size:small"><div class="gmail_default">Hello strongSwan team,</div><div class="gmail_default"><br></div><div class="gmail_default">Thank you for your great job. You are enabling user privacy and internet freedom for people really concerned with this. As for me, this is my use case: I purchased AWS instance with Ubuntu 16.04.2 and installed strongSwan on it, so I was successfully connecting from my home computer to it and was able to bypass restrictions.</div><div class="gmail_default"><br></div><div class="gmail_default">However, as I have to use another network now, the connection is not establishing anymore. I did IP packet captures both on the server and on my machine and found out that the server fragments packets and sends packets with size larger than my MTU during key exchange. I set server MTU to be 1000, but fragmentation is still there, and fragmented packets do not pass to my machine. It seems to be an issue with my new ISP which does not handle fragmented packets.</div><div class="gmail_default"><br></div><div class="gmail_default">I can supply the captures if necessary.</div><div class="gmail_default"><br></div><div class="gmail_default"><div dir="ltr">Regards,<div>Oleg Prutz</div></div>
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