On 1/8/18 2:55 PM, Dovid Bender wrote: > Hi, > > 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. > TIA. >
