Re: DNS Racing -Multi ISP load balancing with failover using DNS.

2011-06-02 Thread Matus UHLAR - fantomas
On 31/05/11 09:28, Matus UHLAR - fantomas wrote: This problem could be avoided by providing the same data, but differently sorted, correct? On 31.05.11 12:27, Phil Mayers wrote: Not really. Client side sorting may take place (e.g. to comply with RFC 3484 policies in calls to getaddrinfo)

Re: DNS Racing -Multi ISP load balancing with failover using DNS.

2011-06-01 Thread Matus UHLAR - fantomas
On 31/05/11 09:28, Matus UHLAR - fantomas wrote: This problem could be avoided by providing the same data, but differently sorted, correct? On 31.05.11 12:27, Phil Mayers wrote: Not really. Client side sorting may take place (e.g. to comply with RFC 3484 policies in calls to getaddrinfo)

Re: DNS Racing -Multi ISP load balancing with failover using DNS.

2011-06-01 Thread Maren S. Leizaola
On 5/31/2011 7:39 AM, Mark Andrews wrote: It is still a bad idea. Fixing the clients so they work well with multi-homed servers not only works today with mostly IPv4 servers but also works well with dual stack server and IPv6 only servers. You don't have to have artifially low TTLs on the DNS

Re: DNS Racing -Multi ISP load balancing with failover using DNS.

2011-06-01 Thread Phil Mayers
On 01/06/11 08:11, Matus UHLAR - fantomas wrote: On 31/05/11 09:28, Matus UHLAR - fantomas wrote: This problem could be avoided by providing the same data, but differently sorted, correct? On 31.05.11 12:27, Phil Mayers wrote: Not really. Client side sorting may take place (e.g. to comply

Re: DNS Racing -Multi ISP load balancing with failover using DNS.

2011-05-31 Thread Matus UHLAR - fantomas
In message 4de43e3e.2040...@chrysler.com, Kevin Darcy writes: Normally I'd defer to your vastly greater knowledge and experience in DNSSEC, but here in the U.S. we have a saying I'm from Missouri, which is a roundabout way of expressing show me (Show Me being the unofficial slogan of

Re: DNS Racing -Multi ISP load balancing with failover using DNS.

2011-05-31 Thread Phil Mayers
On 31/05/11 09:28, Matus UHLAR - fantomas wrote: This problem could be avoided by providing the same data, but differently sorted, correct? Not really. Client side sorting may take place (e.g. to comply with RFC 3484 policies in calls to getaddrinfo) and destroy any server-side sorting.

Re: DNS Racing -Multi ISP load balancing with failover using DNS.

2011-05-30 Thread Matus UHLAR - fantomas
On 30.05.11 05:12, Maren S. Leizaola wrote: DNS-Racing is a method of load balancing access to servers which are multi homed and provides lowest latency access to users and network resilience to ISP/routing failure. like, RRset sorting? **What does it do?* It permits a server which is

Re: Re: DNS Racing -Multi ISP load balancing with failover using DNS.

2011-05-30 Thread Maren S. Leizaola
Hello, I am reading this mailing as a digest so sorry for the late replies. Firstly we have been using this method for over 4 years and I've yet not had one person tell me that they can connect to our servers using POP3, SMPT, IMAP or WEB. 1. Mark, Regarding Chrome, my last big

Re: DNS Racing -Multi ISP load balancing with failover using DNS.

2011-05-30 Thread Mark Andrews
It is still a bad idea. Fixing the clients so they work well with multi-homed servers not only works today with mostly IPv4 servers but also works well with dual stack server and IPv6 only servers. You don't have to have artifially low TTLs on the DNS responses. You get sub-second failover on

Re: DNS Racing -Multi ISP load balancing with failover using DNS.

2011-05-30 Thread Mark Andrews
In message 4de42bef.3050...@chrysler.com, Kevin Darcy writes: Get back to us when you prove that this co-exists with DNSSEC; otherwise it's a non-starter. While you're at it, some data proving that this actually enhances performance or availability would be nice too. On further examination

Re: DNS Racing -Multi ISP load balancing with failover using DNS.

2011-05-30 Thread Kevin Darcy
Normally I'd defer to your vastly greater knowledge and experience in DNSSEC, but here in the U.S. we have a saying I'm from Missouri, which is a roundabout way of expressing show me (Show Me being the unofficial slogan of the state of Missouri). Maybe it *should* work, but when it comes to

Re: DNS Racing -Multi ISP load balancing with failover using DNS.

2011-05-30 Thread Mark Andrews
In message 4de43e3e.2040...@chrysler.com, Kevin Darcy writes: Normally I'd defer to your vastly greater knowledge and experience in DNSSEC, but here in the U.S. we have a saying I'm from Missouri, which is a roundabout way of expressing show me (Show Me being the unofficial slogan of the

Re: DNS Racing -Multi ISP load balancing with failover using DNS.

2011-05-29 Thread Alan Clegg
On 5/29/2011 5:12 PM, Maren S. Leizaola wrote: IT is a poor man’s replacement for BGP multihoming and IP anycast. Hey it is Free and you can implement it using BIND. And you've just broken DNSSEC. AlanC signature.asc Description: OpenPGP digital signature

Re: DNS Racing -Multi ISP load balancing with failover using DNS.

2011-05-29 Thread Mark Andrews
And if people used happy-eyeballs[1] or similar[2] in the applications this would not be needed. Chrome already does this with their latest browser. It uses a 300ms timer to switch to the next address. Happy-eyeballs was primarially written to deal with broken 6to4 links but the techniques are

Re: DNS Racing -Multi ISP load balancing with failover using DNS.

2011-05-29 Thread Warren Kumari
Warren Kumari -- Please excuse typing, etc -- This was sent from a device with a tiny keyboard. On May 29, 2011, at 5:52 PM, Alan Clegg acl...@isc.org wrote: On 5/29/2011 5:12 PM, Maren S. Leizaola wrote: IT is a poor man’s replacement for BGP multihoming and IP anycast. Hey it is

Re: DNS Racing -Multi ISP load balancing with failover using DNS.

2011-05-29 Thread Mark Andrews
In message 2c591af8-860d-45a5-9f3a-3603f3733...@kumari.net, Warren Kumari writes: Um, how? Surely you can just sign the responses, same as any others? Maybe I'm missing something obvious, but this just looks like normal DNS LB... W It depends on who is doing the modification.

Re: DNS Racing -Multi ISP load balancing with failover using DNS.

2011-05-29 Thread Warren Kumari
Warren Kumari -- Please excuse typing, etc -- This was sent from a device with a tiny keyboard. On May 29, 2011, at 9:32 PM, Mark Andrews ma...@isc.org wrote: In message 2c591af8-860d-45a5-9f3a-3603f3733...@kumari.net, Warren Kumari writes: Um, how? Surely you can just sign the