I complete SEO for some pretty large clients with budgets in between $10k and $50k a month. Usually when you're dealing with multi million dollar companies, or at least from my experience, there isn't many issues with negative SEO. Well 4 months ago, one of my larger clients made it to position 6 for their target (very competitive) keyword, beating out one of the leaders in their industry. Just an FYI, our comp. has been ranking in the SEs since the SEs have existed and the company I am handling the SEO for is a few years old. About 2 months ago I noticed our ranking slip to position 13 for no apparent reason. We assumed it was an over optimization issue with the site. So I began changing H1s, Metas, and URLs of the innerpages that were over-optimized for the keyword I noticed the ranking slip with. Rankings improved slightly to position 9. But i still noticed our competitor who slipped to position 9 now firmly in position 6. They've done some slight link building, looking at ahrefs, but nothing that should have knocked us back. At the beginning of this month while gathering the data for the January reporting I noticed links from phpDolphin in GOOGLE WEBMASTER TOOLS. Korean links from phpDolphin. Links that look just like the links I obtain when blasting my 2nd and 3rd tier with a secondary tier in GSA. It's an obvious attack and I can bet it's the comp thats been battling us for the 6th spot. So I have a few questions. 1. Should I disavow these links immediately? This "industry" is pretty big world wide which works in our favor. BUT there's only approx. 700 links pointing at the site now. I know there are some instances where negative SEO works in favor of, but I think this site is too new to benefit from negative SEO. The ranking slip has already indicated that, IMO. 2. Is there a way to locate the IP of the server (leaks) and figure out what asshole is doing this? These are reputable companies I'm speaking of here and its just amazing to me the lengths some people will go when they're getting their ass handed to em'. Any knowledge shared would be greatly appreciated.