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Giampaolo Carmagnani wrote: > (snip) > want to kow the openvpn's overhead. Then I found this page: > http://mia.ece.uic.edu/~papers/volans/openvpn1.html Hi, I don't know how you found this page, I have been searching all over for this kind of information. It sheds some light on the subject, but still it contradicts with what I observed in my original post. I use the encryption and compression as the tester, and for some packet sizes I should be getting an overhead of 45 bytes just like in his tables. However when I set mssfix to 1464, the resulting tunneled mss is 1382, which allows for at most 42 bytes of overhead. So somehow OpenVPN knows that it will never cross this boundary, as it is not possible to change the mss of a connection "in flight". Maybe it is guaranteed for large packets only, who knows. My C is not nearly up to the task to understand how it is actually done. Either way, it was a pretty interesting reading. Thanks for the input. Peter ______________________ OpenVPN mailing lists https://lists.sourceforge.net/lists/listinfo/openvpn-users |