dns cache beyond ttl - viasat / exede

Mon Oct 7 18:15:44 UTC 2019

On Mon, Oct 7, 2019 at 10:13 AM Brielle <bruns at 2mbit.com> wrote:

> * Responding to three way handshake before the other end actually does
> (nmap -sT remote host ends up with every port being 'open' but closing
> connection right away)
>

This is the action of the TCP accelerator. TCP has a "long fat pipe"
problem where high-delay links (like a trip to geostationary orbit and
back) demolish throughput. To combat this, satellite protocols translate
TCP flows to a non-TCP or modified TCP protocol for transmission through
the satellite and then back to TCP in the modem.

Regards,
Bill Herrin

-- 
William Herrin
bill at herrin.us
https://bill.herrin.us/
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