Tue Sep 13, 2022 10:48 am
Without having to look at anything, I simply tell you that two connections cannot be added together like two streams of water.
Whatever you do, using standard devices, it is impossible to increase the speed beyond the fastest ADSL.
What can be done is to distribute the connections between the two lines for an almost homogeneous use.
With some programs you can download multiple pieces (in different places) of the same file at the same time (if the remote site supports it),
apparently increasing the download speed of that file.
Some speedtests (if the router is configured well) can make it seem like a higher download speed, but that's bullshit, because in real traffic,
on sites where authorization is requested, it is not allowed (rightly, for safety) to use the service simultaneously authenticating from multiple IPs.
Obviously, if the content is static, and does not require authorization, it makes no difference, but the mangle cannot know it regardless,
unless it manages lists of sites that can or cannot be consulted without authentication.
To "really" add up the download speed, at the cost of increasing latency often more than double,
it is possible (ignoring the details for now) to make two VPNs, one for each ADSL line, on a single remote router,
and take advantage of the connection of the remote router (which obviously must have at least double the bandwidth of the sum of the ADSL).