We have two proxy servers available at our facility. An internal at 172.x.x.x that connects on port 8080 and requires our domain username and password. A second one at 10.x.x.x that connects at port 8080 and according to my IT group should not need a log in. I have tried both servers with and without a login and also on ports 80 and 8080. In all instances I get this message during the connection test, " HTTPS dialog failed. (Could not connect to proxy server)" Can you provide any more information on what this is telling me besides the obvious?
Can you take a look at the doc below and see if these ports are whitelisted on your network?
Can you do something like this with a VPN or it has to be a proxy?
No, you cannot connect to our VPN through another VPN.
Usually the problem could be from the proxy provider you have, or if the proxies are free they could be damaged. I am working in a SEO company for some time, and we are working only with proxies, they are more practical for us. One day all our proxies servers went down, and basically a SEO company can’t work without a proxy, each of us started looking for some free proxies to work at least until we will find the permanent decision. These proxies were good for only 1 hour, after they went down as well. At least in this hour I wasn’t doing my job, but was searching for a proxy provider, and I found https://iproyal.com/residential-proxies/ who gave us some proxies with a very good price per GB, it was 2 years ago, and we are still working with them, I recommend you their services.