I just checked my Webmaster tools today and saw that I had 7000 incoming links on Webmasters tools. It was a shock to me because before that I had like 500-600 links only. When I checked the domain it was an IP address - like 188.8.131.52 (example) as I don't want to reveal my niche in public. This domain had linked to me over 6500 times. Every page on my site was spammed with over 500 links and links were like "sex tape of xx" "real life hot fuck" and all that spammy shit. Now, I am really confused about what should I do and how can I prevent this from again. My first action will be to disavow the links but I have never used this tool before. Should I just use the domain (IP Address) and disavow it as a whole? Or should I download each and every link manually and create a list of 7000 URL's and then disavow? My ranking dropped from #6 to #20 and this has pissed me off but this is the nature of SEO, I guess. Please help me out in dealing with this as I have no prior experience in dealing with spam like this. Thank you.