DNS Upgrade Details: Slave Service
This post provides additional information about our global DNS network upgrades as it pertains to using our Slave DNS service. If you haven’t yet heard about our network upgrades, then that’s the place to start.
Another post discusses the changes for our Standard and/or Standard with Master DNS services (also including custom/vanity nameserver use for all services).
What changes do I need to make?
There are two potential changes for domains that use our Slave only service.
1. If you use vanity names for our nameservers, you will need to change IP addresses of the vanity nameservers. Since this also affects our other services, details are in that post: DNS upgrades: Standard and Standard with Master services.
2. If you restrict AXFR transfers to our IPs, you will need to allow transfers from the new IPs of our designated slave zone transfer servers. If you restrict transfers by domain name, then you probably will not need to make a change (unless your nameserver software caches the results).
The designated zone transfer server IPs will be changing as follows:
- s1.ns.zerigo.net — 64.27.57.11 → 68.71.141.22
- s2.ns.zerigo.net — 208.78.96.210 → 174.36.24.251
We strongly recommend adding the two new IPs to your allow list immediately, while leaving the old IPs in the list for several days. Zone transfer request attempts have already begun on the two new servers. This should allow you to check your logs to confirm that we are able to receive transfers on the new IPs. Feel free to contact our support team to verify it from this side if you’re unsure.
The server names (s1.ns.zerigo.net and s2.ns.zerigo.net) will point at the old IPs until Wednesday, June 16 at 10:00am MDT (16:00 UTC). After that time, they will point to the new IPs. This should only matter to those restricting transfers by domain name.
In order to avoid any interruption in receiving updates to your zone records, we will continue to make zone transfers requests from the old IPs for several days. Once our systems confirm that we can receive zone transfers from the new IPs, we will use those servers as the source of your zone transfer data. We will also be following up with you via email if we see that the new IPs are not able to communicate with your master.
Once you see successful AXFR transfers from both of the two new IPs, you can be assured that the transition to the new slave zone transfer servers will be smooth and that updates will continue to be received by our servers from your designated master.
After the old servers stop making requests to your master, you may safely remove the old IPs from your allow list.
Additionally, if you have been using s1.ns.zerigo.net and s2.ns.zerigo.net as the names of our nameservers for DNS traffic (that is, those names are associated with NS records for your domain), please change to using any or all of a.ns.zerigo.net though e.ns.zerigo.net. s1 and s2 are only the addresses we make zone transfer requests from and are not our standard nameservers.
If you have questions or comments, please send us an email.