[dns-operations] Postures was Re: Stunning security discovery: AXFR may leak information

2015-04-15 Thread Edward Lewis
John Crain alluded to the point I want to reinforce here. There are many different operational postures. It's tempting to see a situation as it applies to just one. The three snips below illustrate common environments I've run across - TLD (/registration zones), remote debugging (/third-party ma

Re: [dns-operations] Postures was Re: Stunning security discovery: AXFR may leak information

2015-04-15 Thread George Michaelson
I find the question: "if you had an FTP fetch of the zone, would you feel comfortable making that available for anonymous FTP" a useful question. In reverse, we have the entire zonestate as FTP files. publicly visible. Signed in PGP. And we have whois, with varying degrees of throttle, for operati

Re: [dns-operations] Postures was Re: Stunning security discovery: AXFR may leak information

2015-04-15 Thread Edward Lewis
On 4/15/15, 7:42, "George Michaelson" wrote: >So on that basis: the FTP rule passes: we have open FTP, why would we >block AXFR? It's your call, it's local policy. I've worked in environments where the name servers answering queries did not implement the AXFR mechanism. "Generally unwise" can

Re: [dns-operations] Postures was Re: Stunning security discovery: AXFR may leak information

2015-04-15 Thread Tony Finch
Edward Lewis wrote: > > (By the same token, why would one use NSEC3 for signed zones when the zone > is available over FTP?) Opt-out. Tony. -- f.anthony.n.finchhttp://dotat.at/ Trafalgar: Cyclonic 5 or 6. Moderate or rough. Thundery showers. Moderate or good. ___

Re: [dns-operations] Postures was Re: Stunning security discovery: AXFR may leak information

2015-04-15 Thread Hugo Salgado
On 04/15/2015 10:01 AM, Tony Finch wrote: > Edward Lewis wrote: >> >> (By the same token, why would one use NSEC3 for signed zones when the zone >> is available over FTP?) > > Opt-out. Yes. Zone size. Hugo ___ dns-operations mailing list dns-operatio

Re: [dns-operations] Postures was Re: Stunning security discovery: AXFR may leak information

2015-04-15 Thread Edward Lewis
On 4/15/15, 9:01, "Tony Finch" wrote: >Edward Lewis wrote: >> >> (By the same token, why would one use NSEC3 for signed zones when the >>zone >> is available over FTP?) > >Opt-out. I thought I was going to avoid expanding the discussion into NSEC3 by limiting my comment to just that. Apparentl