MTU to CDN's
joelja at bogus.com
Mon Jan 8 23:08:51 UTC 2018
On 1/8/18 2:55 PM, Dovid Bender wrote:
> N00b here trying to understand why certain CDN's such as Cloudfare have
> issues where my MTU is low. For instance if I am using pptp and the MTU is
> at 1300 it wont work. If I increase to 1478 it may or may not work.
PMTUD has a lot of trouble working reliability when the destination of
the PTB is a stateless load-balancer.
If your tunnel or host clamps the mss to the appropriate value it can
support. it is highly likely that connection attempts to the same
destination will work fine.
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