Re: [dns-operations] Recently closed open resolver and reflection attacks

2013-03-07 Thread nudge
On Thu, Mar 7, 2013, at 09:29 AM, nudge wrote: > On Wed, Mar 6, 2013 Vernon Schryver wrote: > ... > > I know of no way to use authentication on end user computers except > > by something like installing a forwarding, caching DNS server on every > > end user computer. > > What would be the effect

Re: [dns-operations] Recently closed open resolver and reflection attacks

2013-03-07 Thread Dobbins, Roland
On Mar 7, 2013, at 12:02 AM, Joe Abley wrote: > I don't think this is a necessarily harmful approach. It isn't harmful - on the contrary, it's beneficial, because it keeps out-of-bailiwick queries off the nameservers themselves in the first place It is a BCP.

Re: [dns-operations] Recently closed open resolver and reflection attacks

2013-03-07 Thread Roy Arends
Thanks Mark, much appreciated! Roy On Mar 7, 2013, at 4:28 PM, Mark Andrews wrote: > > In message , Roy Arends writes: >> [1] BIND responds with SERVFAIL to a query where the QNAME is longer than >> 255 bytes. When all the servers for a domain are BIND, th >> is often leads to a burst of requ

Re: [dns-operations] Recently closed open resolver and reflection attacks

2013-03-07 Thread Mark Andrews
In message , Roy Arends writes: > [1] BIND responds with SERVFAIL to a query where the QNAME is longer than 255 > bytes. When all the servers for a domain are BIND, th > is often leads to a burst of requests, striped over all the authoritative > servers for that domain. Naturally, a resolver sho

Re: [dns-operations] Recently closed open resolver and reflection attacks

2013-03-07 Thread Roy Arends
On Mar 7, 2013, at 7:06 AM, Edward Lewis wrote: > > On Mar 6, 2013, at 20:33, Paul Vixie wrote: >> if the authority server in question is configured to be a primary or >> secondary server for a zone which is at or above the qname, then the correct >> answer is either authoritative-positive, au

[dns-operations] DNS OARC Spring 2013 Workshop - Dublin, 12th/13th May

2013-03-07 Thread Keith Mitchell
OARC's 2013 Spring Workshop will be held on Sunday 12th, and the morning of Monday 13th May 2013, in Dublin Ireland, at the same location as, and immediately prior to the RIPE66 meeting. Call for Presentations --- We are soliciting presentations in all areas of DNS-OARC's "Ope

Re: [dns-operations] Recently closed open resolver and reflection attacks

2013-03-07 Thread Vernon Schryver
> From: Edward Lewis > We chose SERVFAIL instead of REFUSED for that - in the sense that the = > service failed by sending the querier to the wrong place. I don't think = > either is better than the other, just saying this because it's not = > always clear what's the right RCODE. It seems at be

Re: [dns-operations] Recently closed open resolver and reflection attacks

2013-03-07 Thread Edward Lewis
On Mar 6, 2013, at 20:33, Paul Vixie wrote: > if the authority server in question is configured to be a primary or > secondary server for a zone which is at or above the qname, then the correct > answer is either authoritative-positive, authoritative-negative, or servfail. Or a non-authoritativ

Re: [dns-operations] Recently closed open resolver and reflection attacks

2013-03-07 Thread nudge
On Wed, Mar 6, 2013 Vernon Schryver wrote: ... > A few recursive servers such as those at 8.8.8.8 apparently want to > attract requests from the whole Internet. I agree that most recursive > servers should know their client bases by IP address or authenticating > token, but in practice that has pr