Re: [DNSOP] Re: Last Call: draft-ietf-dnsop-reflectors-are-evil (Preventing Use of Recursive Nameservers in Reflector Attacks) to BCP

2007-10-03 Thread Paul Wouters
On Fri, 28 Sep 2007, Jaap Akkerhuis wrote: There are two major reasons for an organization to not want roaming users to trust locally-assigned DNS servers. Open recursive servers doesn't help in against man in the middle attacks. If you want to avoid that use VPN's or (for DNS) TSIG.

Re: [DNSOP] Re: Last Call: draft-ietf-dnsop-reflectors-are-evil (Preventing Use of Recursive Nameservers in Reflector Attacks) to BCP

2007-10-03 Thread Paul Wouters
On Fri, 28 Sep 2007, Dean Anderson wrote: Maybe its not mentioned because its not a practical solution. But whatever the reason it isn't mentioned, a 25 million user VPN is not going to happen with 10/8. A comcast person recently complained on PPML that there wasn't enough RFC1918 space for

Re: [DNSOP] Re: Last Call: draft-ietf-dnsop-reflectors-are-evil (Preventing Use of Recursive Nameservers in Reflector Attacks) to BCP

2007-10-03 Thread Paul Wouters
On Fri, 28 Sep 2007, Joe Abley wrote: I'm surprised by that comment. I think it's a common use case that organisations who deploy VPNs have split DNS; that is, namespaces available through internal network resolvers that do not appear in the global namespace. In my experience, it is normal

Re: [DNSOP] Re: Last Call: draft-ietf-dnsop-reflectors-are-evil (Preventing Use of Recursive Nameservers in Reflector Attacks) to BCP

2007-10-03 Thread Tim Chown
On Fri, Sep 28, 2007 at 05:29:43PM -0400, Paul Wouters wrote: On Fri, 28 Sep 2007, Dean Anderson wrote: Maybe its not mentioned because its not a practical solution. But whatever the reason it isn't mentioned, a 25 million user VPN is not going to happen with 10/8. A comcast person

Re: [DNSOP] Re: Last Call: draft-ietf-dnsop-reflectors-are-evil (Preventing Use of Recursive Nameservers in Reflector Attacks) to BCP

2007-10-02 Thread Sam Hartman
Joao == Joao Damas [EMAIL PROTECTED] writes: Joao It does indeed as Stephane pointed out. Opening up your Joao resolver so you can server roaming users, without further Joao protection, is, at best, naive. I'd appreciate it if you took Paul's comments a lot more seriously and

Re: [DNSOP] Re: Last Call: draft-ietf-dnsop-reflectors-are-evil (Preventing Use of Recursive Nameservers in Reflector Attacks) to BCP

2007-10-01 Thread Mark Andrews
As for the TSIG or SIG(0) recommendation, I'm not sure what the numbers are for client support today, but I suspect it's at best an negligible sample. Well all Windows XP/2003/Vista boxes can be configured to support TSIG, with free software, if not natively. All

Re: [DNSOP] Re: Last Call: draft-ietf-dnsop-reflectors-are-evil (Preventing Use of Recursive Nameservers in Reflector Attacks) to BCP

2007-10-01 Thread Danny McPherson
On Oct 1, 2007, at 7:42 PM, Mark Andrews wrote: As for the TSIG or SIG(0) recommendation, I'm not sure what the numbers are for client support today, but I suspect it's at best an negligible sample. Well all Windows XP/2003/Vista boxes can be configured to support TSIG,

Re: [DNSOP] Re: Last Call: draft-ietf-dnsop-reflectors-are-evil (Preventing Use of Recursive Nameservers in Reflector Attacks) to BCP

2007-10-01 Thread Mark Andrews
On Oct 1, 2007, at 7:42 PM, Mark Andrews wrote: As for the TSIG or SIG(0) recommendation, I'm not sure what the numbers are for client support today, but I suspect it's at best an negligible sample. Well all Windows XP/2003/Vista boxes can be configured to support TSIG,

Re: [DNSOP] Re: Last Call: draft-ietf-dnsop-reflectors-are-evil (Preventing Use of Recursive Nameservers in Reflector Attacks) to BCP

2007-09-28 Thread Joao Damas
It does indeed as Stephane pointed out. Opening up your resolver so you can server roaming users, without further protection, is, at best, naive. Joao On 28 Sep 2007, at 12:15, Jaap Akkerhuis wrote: There are two major reasons for an organization to not want roaming users to

Re: [DNSOP] Re: Last Call: draft-ietf-dnsop-reflectors-are-evil (Preventing Use of Recursive Nameservers in Reflector Attacks) to BCP

2007-09-28 Thread Joe Abley
On 28-Sep-2007, at 1136, Paul Hoffman wrote: It is not obvious, at least to some of the people I have spoken with. It is also not obvious to VPN vendors; otherwise, they would have easy-to-use settings to make it happen. I'm surprised by that comment. I think it's a common use case that

Re: [DNSOP] Re: Last Call: draft-ietf-dnsop-reflectors-are-evil (Preventing Use of Recursive Nameservers in Reflector Attacks) to BCP

2007-09-28 Thread Paul Hoffman
At 12:04 PM -0400 9/28/07, Joe Abley wrote: On 28-Sep-2007, at 1136, Paul Hoffman wrote: It is not obvious, at least to some of the people I have spoken with. It is also not obvious to VPN vendors; otherwise, they would have easy-to-use settings to make it happen. I'm surprised by that

Re: [DNSOP] Re: Last Call: draft-ietf-dnsop-reflectors-are-evil (Preventing Use of Recursive Nameservers in Reflector Attacks) to BCP

2007-09-28 Thread Ned Freed
On 28-Sep-2007, at 1136, Paul Hoffman wrote: It is not obvious, at least to some of the people I have spoken with. It is also not obvious to VPN vendors; otherwise, they would have easy-to-use settings to make it happen. I'm surprised by that comment. I'm not. As it happens I've used

Re: [DNSOP] Re: Last Call: draft-ietf-dnsop-reflectors-are-evil (Preventing Use of Recursive Nameservers in Reflector Attacks) to BCP

2007-09-28 Thread Joe Abley
On 28-Sep-2007, at 1516, Dean Anderson wrote: Not widely supported in clients. Therefore, not a solution. In fact, it's quite feasible in operating systems which can run a local instance of (say) BIND9. It would be fair to say that installing and configuring BIND9 on an average laptop is