* Free DNS hosting

since my DNS are working perfect. and as per my regular visitors says they are not able to access the site, instead they are getting >http://awesomescreenshot.com/0482va5j46 this.

* Reverse DNS

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DNS

Rackspace. CloudFlare is the DigitalOcean of DNS providers.

(Quote)

I'm not really keen on CloudFlare. I find their websites goes offline for minutes at a time several times a day for me and it's irritating whilst trying to edit a DNS record.

@1e10 if you really what anycast dns, try cloudflare

Been using Rackspace DNS for about a week or two now. On their website they advertise it as being anycast.

* Reverse DNS Available (On Request)

toshost.com. 21599 IN SOA iris.ns.cloudflare.com. dns.cloudflare.com. 2015263308 10000 2400 604800 3600

-Reverse DNS (On Request)

They only seem to have a DNS issue. The webserver itself is working.

I have been looking at trafshow and netstat, mostly http traffic and sometimes google dns queries, nothing out of ordinary, but according to solus stat I have spike every 20 mins or so

Even with "just" 150 concurrent connections, there is a lot of room to use your public DNS server for amp attacks. It will also kill legitimate traffic once the limit has been hit. Y

Why don't you setup the DNS server within your LAN? It's bad practice anyway to resolve all DNS queries through a remote server which is (potentially) far away from your home location (latency-wise).

As far as I can tell, this kind of attack is in fact not possible to successfully execute on DNSMasq, as:

Could you please elaborate on how this can be considered a security risk? E.g. are all public DNS Servers potentially dangerous? Thank you!

Yes, No, and No. DNS has no authentication mechanism so you're kind of stuck with ip-based authentication, i.e. iptables.