I am having the same issue. I have been running iTSec just fine after updating 4 days ago. I was doing some security maintenance (checking 404s, creating some redirects, looking into suspicious IPs) – then right in the middle of working, I got kicked to homepage. Then I couldn’t get back to admin at all.
Went to FTP, renamed iTSec folder, can get in just fine. I use Hide Backend, so I tried removing that part of the code in htaccess, changed plugin folder back to normal. No go. Rewound to where I was.
I was working between iTSec and Redirection plugins (which, it doesn’t have any redirects for admin), so I tried changing plugin folder name for Redirection. No go. Rewind.
It seems to be isolated to iTSec :/ I was looking into why Google was getting so many errors, thinking I had banned a googlebot IP address, I was researching that when it kicked me out…
WP 4.4.2
iTSec 5.2.1
Host GoDaddy
Plugins – Duplicator, Redirection, Securi, Updraft Plus, Yoast SEO
