You can add adobe.com to the list. On Wed, Mar 6, 2024 at 6:55 PM Dan McCombs via dns-operations < dns-operati...@dns-oarc.net> wrote:
> > > > ---------- Forwarded message ---------- > From: Dan McCombs <dmcco...@digitalocean.com> > To: dns-operations@lists.dns-oarc.net > Cc: > Bcc: > Date: Wed, 6 Mar 2024 16:50:31 -0500 > Subject: Large amount of TXT records on cisco.com causing truncation > Hi all, > > Is there anyone from Cisco on this mailing list? > > I was looking through some queries earlier and noticed a large amount of > cache misses on our infra for TXT queries for cisco.com. There's a lot of > TXT records there that look like a lot of possibly stale site/domain > verification entries, and I'm wondering if those could be cleaned up to > save the extra queries hitting your nameservers. > > The cisco.com nameservers are responding with the TC flag set and no > answer, so clients querying via UDP keep missing cache before retrying over > TCP. It receives a fair amount of traffic with a lot of unnecessary UDP > queries because of that. I added a rule to dnsdist to respond with TC > directly for now in that case, but I'm sure it would help both themselves > and others to clean up those records since it's a popular domain. > > Take care, > > -Dan > > > Dan McCombs > Senior Engineer I - DNS > dmcco...@digitalocean.com > > > > ---------- Forwarded message ---------- > From: Dan McCombs via dns-operations <dns-operati...@dns-oarc.net> > To: dns-operations@lists.dns-oarc.net > Cc: > Bcc: > Date: Wed, 6 Mar 2024 16:50:31 -0500 > Subject: [dns-operations] Large amount of TXT records on cisco.com > causing truncation > _______________________________________________ > dns-operations mailing list > dns-operations@lists.dns-oarc.net > https://lists.dns-oarc.net/mailman/listinfo/dns-operations >
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