AT CORE documentation

ATC - security - proxies

ATC detects 2 types of proxy surfers; open proxy surfers and anonymous proxy surfers.
A open proxy can easily be detected via the data a surfers browser sents with its page loading request.
A anonymous proxy is much more difficult to detect. You can fill out all anonymous proxy IPs here,
and ATC will mark all hits coming from these IPs as (anonymous) proxy hits.