G root servers unreachable via ICMP(v6)

Tue May 16 18:35:36 UTC 2023

On Tue, May 16, 2023 at 11:00 AM Christopher Morrow
<morrowc.lists at gmail.com> wrote:
> On Tue, May 16, 2023 at 4:37 AM <borg at uu3.net> wrote:
> > Cutting PING means you are hurting your basic troubleshooting.
> > Is that thing even plugged in? Maybe Firewall misconfiguration?
>
> it means you need to use the tool (dig, host, nslookup) that talks to
> the service being offered.
> ping is basically meaningless as a test for 'is the service working'
> on a dns server.

Ping is used by some versions of traceroute which can help the
diagnostician figure out where the failure is happening. Which often
isn't at the server itself.

When working, it also lets the diagnostician know that the site's
firewall administrator didn't ignorantly decide to block all ICMP.
Which so very many ignorant firewall administrators do.

Regards,
Bill Herrin

-- 
William Herrin
bill at herrin.us
https://bill.herrin.us/