Re: Recent DNS attacks from China?

[sthaug () nethelp no]

> > I am wondering if anyone else is seeing a sudden increase in DNS attacks
> > emanating from chinese IP addresses?  Over the past 24 hours we've seen a
> > sudden rash of chinese IPs attacking our DNS servers in the order of 5 to 10
> > million PPS for periods of 5 to 10 mins, repeated every 20 to 30 minutes.
>
> > This anomalous traffic started roughly 24 hours ago, and while we've had
> > occasions of anomalous chinese traffic, never anything of this type.
>
> I don't know if it's related, but at about the same time USNO reported an 
> attack on their NTP servers.
>
> I could easily imagine a piece of malware with a bug that does massive 
> retransmits on both DNS and NTP.

I'm seeing DNS-based attacks on a regular basis, typically several
per day. Often involving ANY isc.org or ANY ripe.net to get a good
amplification. E.g. *right now* an amplification attack against
78.159.111.190.

Steinar Haug, Nethelp consulting, sthaug () nethelp no