On 10/21/2015 12:25 PM, Patrik Flykt wrote:
> On Wed, 2015-10-21 at 12:12 +0200, Daniel Wagner wrote:
>> The use of the different MTU options depend on you server and link
>> configuration. I don't think you can derive it. OpenVPN seems to offer
>> an option to learn the MTU size by doing some measurements but that
>> takes around 3 minutes according documentation. I recommend to just
>> expose those options and let the user decide what he needs.
> Well, now the problem is that I have no idea what to add as MTU values
> if I need to... Sven's "documented" problem and solution was to use
> --tun-mtu, if that is the max sized packet that can go through
> unfragmented it looks like the only option one should specify. And
> --fragment seems to be needed always in addition to any of the MTUs?
> Unless it's the default behavior?

I don't know if there is a sane MTU configuration setting for OpenVPN. I
reread the documentation several times and it seems you need to pick the
options according your configuration.
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