nanog mailing list archives
Re: DNS DOS increasing?
From: Alex Kamantauskas <alexk () tugger net>
Date: Mon, 21 Jan 2002 09:29:07 -0500 (EST)
I've been seeing some strange problems in DNS lately (named 8.2.4-REL) where the nameserver stops resolving certain sites. During investigation I noticed that my query rate is way up. Many more DNS requests than normal are hitting my servers. Is anyone else seeing anything like this?Could just be that someone || groupd of people, have decided to use your DNS servers as their own for resolving queries?
I've seen DOS-type behavior where a client will query a resolver for a name that doesn't exist, and the client does not accept the answer that the name does not exist and immediately sends another query, regardless of whether or not the resolver declared itself authoritative for the negative answer. -- /ak
Current thread:
- DNS DOS increasing? Matt Martini (Jan 19)
- Re: DNS DOS increasing? Avleen Vig (Jan 20)
- Re: DNS DOS increasing? Alex Kamantauskas (Jan 21)
- <Possible follow-ups>
- RE: DNS DOS increasing? James Smith (Jan 21)
- RE: DNS DOS increasing? E.B. Dreger (Jan 21)
- Re: DNS DOS increasing? Joel Baker (Jan 21)
- Re: DNS DOS increasing? E.B. Dreger (Jan 21)
- RE: DNS DOS increasing? E.B. Dreger (Jan 21)
- Re: DNS DOS increasing? Avleen Vig (Jan 20)
- RE: DNS DOS increasing? Karyn Ulriksen (Jan 21)
- Re: DNS DOS increasing? Rob Evans (Jan 21)
- RE: DNS DOS increasing? James Smith (Jan 21)
- Re: DNS DOS increasing? Stephen Griffin (Jan 21)
- Re: DNS DOS increasing? E.B. Dreger (Jan 21)
- Re: DNS DOS increasing? Stephen Griffin (Jan 21)
- Re: DNS DOS increasing? Miquel van Smoorenburg (Jan 21)