Re: Question about DNS naming conventions

Am 12.02.25 um 11:24 schrieb Mark Tinka: On 2/12/25 10:32, Thomas Mieslinger via NANOG wrote: "Just" using IATA 3 letter airport codes is not good enough in my opinion because you usally have multiple datacenters/CoLos/PoPs around a bigger airport like MCI or FRA This. We use

Re: Question about DNS naming conventions

To the best of my knowledge there are two types of PTR/A Records. For dailup prefixes, IPs used for DSL,Cable, etc PTR should be generated and contain the IP to make it easier to block emails from that ranges. For v6 prefixes you will probably want to do this programmatically with e.g. powerdns

Re: COLO space in EU

If I remember my company's latest Frankfurt contract, that was a few 100€ for the racks but 10s of thousands € yearly for the energy (~7kw per rack) To me, today, datacenter colo business is just reselling energy. Am 12.12.24 um 10:55 schrieb Elmar K. Bins: nanog@nanog.org (Thomas Miesl

Re: COLO space in EU

.278€ per kWh is sort of a list price what they have to pay to the utility. On top of that they run 20kW cooling equipment and 20kW UPS. I have seen even higher prices in Frankfurt. Am 11.12.24 um 19:45 schrieb harbor235: Hi all, Looking for colo space in Amsterdam, is it common to have to pa

Re: TFTP over anycast

I do NTP, DHCP, TFTP, DNS, HTTP anycast. NTP, DNS and HTTP with ECMP, TFTP and DHCP as active/active on a per Datacenter Basis. These are small Datacenters with less than 50k Servers each. In every datacenter an anycast node is active and the router just chooses the shortest path. It becomes t

ns1-proddns.glbdns.o365filtering.com unreachable?

Anyone else with trouble to reach the *.o365filtering.com DNS Servers?

Re: NXDOMAIN Resolvers

There are public and commercial offerings for "DNS based protection". e.g. 9.9.9.9 automatically generates NXDomains for suspected malicious DNS Names even in their free service. They have a page where you can check if you have been blacklisted (see https://www.quad9.net/de/result) On 4/20/22

Re: IP tracking system

Am 15.12.21 um 19:22 schrieb Rich Greenwood via NANOG: On Wed, Dec 15, 2021 at 4:00 AM mailto:nanog-requ...@nanog.org>> wrote: From: Mauricio Rodriguez mailto:mrodrig...@fletnet.com>> This one seems to be popular and complete: https://phpipam.net/ . We use ph

anyone from cisco.com DNS Team around?

Hi, I have trouble to activate my Cisco NCS5xxx Devices. Turns out that tools.cisco.com. resolves to either 173.37.145.8 (this works) or 72.163.4.38 (which was decommissioned earlier this year). By running dig A tools.cisco.com @alln01-ucs-dcz03n-gslb1-snip.cisco.com four times I can reproduc

Re: a quick survey about LLDP and similar

A little more on the "it depends" switches connected to end-user/customer gear: never ever. switch to switch, switch to router interfaces: yes, to validate cabling and resolve problems as quickly as possible. switch to server interfaces: only to servers of teams you can trust. temporarily en

someone from easydns here? dns3.easydns.org. 2620:49:3::10 unreachable from AS8560 and 6939

Hi, can someone operating easydns nameserver check whether 2620:49:3::10 is answering? I create a atlas measurement https://atlas.ripe.net/measurements/10137819 and I can see that some AS still can reach 2620:49:3::10 but many many timeouts. For me, it stops working after 2a00:dd80:9:3::2 (