And then CloudFlare DNS goes down and they don't support secondary DNS.

Thanks. I think I definitely don't want to complicate things on a DNS level, multiple IPs or simply vhosts look like a good option.

if you're worried dns records do not propagate, it is always possible to have your new records in place much earlier before any migration. Do not really need HAProxy, have old and new servers/nameserv

You should look for something like a floating IP, use HA Proxy + heartbeat on 2 machines. Set this up in 2 geographically different (but not too far away) datacenters and use DNS to update if one of t

So if I go with Amazon Route53 or Rage4 and I set 1 second TTL, it'd work on a DNS level. But wouldn't that make every single request have a DNS lookup? Thus it'd actually slow down the website, would

I remember Amazon Route 53 being quite fast for basic dns.

In most cases, ISPs DNS servers (and the google ones too) will follow the ttl value sent by the DNS servers which serves your domain. If you can't change this value (eg. you use the dns servers provid

* DNS is super slow for it, some ISPs cache DNS for up to 24 hours as far as I know. I cannot just change DNS records multiple times a day, I guess it'd ruin experience for users.

OpenDNS works fine with most lists.

If we don't want to setup our own dns servers, do you have any suggestions? Would opendns work?

i'm not sure if mailcow has that check, but DNS cannot be google or other large resolvers because of spamhaus requirements. (http://www.spamhaus.org/faq/section/DNSBL Usage#261)

I also mentioned rDNS within the article, and also show the sample SPF entries within the DNS template above.

* A DNS provider for your domain name; take a look at dns.he.net, it's free. There are also providers like Rage4.

That's my DNS server recommendation, too. (Image)

apt-get install unbound (or pdnsd if you prefer)

what dns you recommend using with mailcow

did you mean udp 53? something like "vpn over dns" ???

I'd like to use a machine on the local network as a Socks proxy. I'd like DNS requests to be proxied as well as web traffic. Some caching would be nice.

everything onto it ... So yes everyone got new dns/nameservers and access urls etc, but in the 8 months since they were migrated, not 1 minute of unplanned downtime, no longer on a single massively o

How is this compared to Proxmox ?