When it does not work
The four failures that come up most often.
The proxy stopped answering
First check the traffic left in “My access”, with your access login and password. When the traffic runs out, the proxy simply goes silent; nothing is broken. Top up the same login — the password, address and settings stay the same.
407 Proxy Authentication Required
The username or password did not arrive. Usually a stray space from copying, or a special character in the password eaten by the shell — wrap the string in single quotes.
Empty reply, timeout, reset
Check the port: 823 for HTTP with a new address per request, 824 for SOCKS5, 10000–20000 for a held address. The gateway has no other ports.
Out of traffic
Once the paid gigabytes are spent the gateway stops answering. Add more to the same username on the Add traffic page — password and gateway do not change.
Wrong country
Check the suffix: two underscores, cr, a dot, and a lowercase two-letter code. A typo in the code means the default address, not an error.