Delphi 10.2, Indy 10.x
Just trying to understand why this works.
i have a dll that uses https to connect to our server. Works 99% of all our clients but for some outliers i kept getting 10061 connection refused error. after a bunch of trial and error while working with clients IT dept we finally tried running fiddler to help track down the issue. this tracking had me add proxyparams.proxyserver and proxyport to track in fiddler. well it would work without error. after rollbacks and testing we discovered that by leaving the proxyserver 127.0.0.1 in place that it would work and connect to our server and do whatever was needed. now any time we get the 10061 our support sends over the proxyserver version of the dll.
what is the reason or area that we should look at to find the source of the issue to not have to use the workaround proxyserver.
we bypassed AV, firewall off and allow access from internet explorer (edge, chrome, firefox,...)