I have website, which is a very popular website, but from last two weeks several customers complain to me that my site was hacked and redirected to a porn website,
but whenever i check the website i cant see anything like that, users says they sometimes redirected to a porn website and then just in split of a second its gone and correct website appears.
This is very annoying for me, as far as i am concern my DNS setup is fine, (i confirmed this with my server hosting also)
what the possibilities/reason of this type of a thing happening ?
is this our server security problem ?
OR is this a someone hacked into a a ISP and change the DNS records for my site and of some of my customers which uses that ISP are experiencing this problem? (i never experience this problem myself)
is there a set of DNS checks i can do to verify it works ?
or Will this be a DNS problem or something else ... i am clueless