There is no such URL on our site. Moreover, we do not perform any kind of redirection. Either your ISP is doing something weird or you have some malware on your computer. This is most definitely NOT normal and NOT something that originates from our site (at least the portion that's under our, not our host's control).
Being aware of Comcast's legendary levels of bad practices I wouldn't put it past them trying to inject their JavaScript on the page and / or perform shadow redirects. Just to make sure, let's try the following, ideally from a different computer and browser without any browser extensions, antivirus or Internet security / firewall products installed. Make sure you type https://www.akeebabackup.com in your browser address bar. Make sure that HTTPS and www are used. The page should load without CAPTCHA. If it loads with the CAPTCHA please check the SSL certificate. Our certificate is an Extended Validation SSL (EV SSL) certificate issued by COMODO EV SSL with the Organization Name set to Akeeba Ltd. If you see anything else then your ISP (Comcast) is essentially performing a Man In The Middle attack which means that they can read your private communications with SSL sites like ours. If that's the case you should contact them at once.
If, however, you do get a redirect to a CAPTCHA with the valid SSL certificate I want you to tell me your IP address and the exact time and city you were in when this happened so I can talk to SiteGround. I have never heard of them doing a CAPTCHA automatically but that doesn't mean they don't have some security feature I never heard about.
Nicholas K. Dionysopoulos
Lead Developer and Director
🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!