14 okt. 2016 kl. 12:38 skrev Kurt Jaeger
I've discovered, several months ago already, that all the 1&1 web sites
with IPv6 support enabled are broken, because they filter PMTUD, so any
residential customer with has a reduced MTU because PPP or any other
encapsulation/tunnel, etc., is not reaching them.
Do you have an example of a website they host that I can test against?
Yes, it fails PTB test
p...@opsec.eu<mailto:p...@opsec.eu> +49 171 3101372
4 years to go !