Login not allowed from this IP address warning - How to find your external IP address

We have perimeter controls to protect the SYNC service against DoS (Denial of Service) attacks and brute-force password guessing. From time to time, legitimate login attempts can be detected as potentially dangerous and blocked from connecting and you might be greeted with the below.

If you experience this, please visit https://www.whatsmyip.org/ from any browser, take a screenshot that includes the section "Your IP Address is," and send it back to us.