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Anycast provider for SMTP?

Subject: Anycast provider for SMTP?
From: jco at direwolf.com (John Orthoefer)
Date: Mon, 15 Jun 2015 20:56:26 -0400
In-reply-to: <m2eglco72p.wl%[email protected]>
References: <CAO0-hXZKU2gSt3vqj_p0B85xH=yt6RwXJfh_EY9HTzhygnj0Rg@mail.gmail.com> <CAP-guGXUuST7T9XiUNpLHq0g=4UpBXUt-QB0ddp9_rUccr620Q@mail.gmail.com> <[email protected]> <CAA93jw4E+gL45Eo5HjUSqPTAAsvefojzFqpCR4-PWUZwJGN3wA@mail.gmail.com> <m2eglco72p.wl%[email protected]>

> On Jun 15, 2015, at 8:00 PM, Randy Bush <randy at psg.com> wrote:
> 
> dns is udp

15 years ago when we set up 4.2.2.1, there was a fair amount of TCP based DNS.   We tried for a bit to support it via the anycast address, but ultimately we decided the support issues weren?t worth it.  The few customers that asked/required it were given non-anycast addresses to use for TCP based DNS. 

I really think the OPs best answer is some DNS based load balancer, that can take metrics based on routing.

johno

References:
- Anycast provider for SMTP?
  - From: joe at nethead.com (Joe Hamelin)
- Anycast provider for SMTP?
  - From: bill at herrin.us (William Herrin)
- Anycast provider for SMTP?
  - From: nick at foobar.org (Nick Hilliard)
- Anycast provider for SMTP?
  - From: dave.taht at gmail.com (Dave Taht)
- Anycast provider for SMTP?
  - From: randy at psg.com (Randy Bush)

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