It seems like on both Shaw's and Vultr's network I can hammer the cache
all day with s6-dnsip[46]-filter. I send 13 requests, I get 13
responses. Read more at <https://umbrellix.net./~ellenor/s6filterwtf.txt>
On 10/10/22 22:07, Laurent Bercot wrote:
Anyway. Pre-update `/package/web/s6-dns/command/s6-dnsip[46]
perihelion.ultradian.club` returns the correct response on both
machines, even if run after doing the SRV and MX lookups.
Wilder and wilder. Can you test s6-dnsip[46]-filter?
{ echo domain1.org ; echo domain2.org ; ... } | s6-dnsip4-filter
These do A and AAAA queries, but via skadns. If skadnsd is the culprit,
the -filter programs should fail.
(side note: I'm realizing that my program makes duplicate queries.
This shouldn't impact the accuracy of the responses, but it does mean
the caches could be blocking me or something, but not blocking me
when I use /package/web/s6-dns/command/s6-dnsip[46].)
Could be. We're trying to build a simple test case that fails. If our
simple test cases all pass and your program fails, the cause may be in
the way your program is spamming the cache - but you'd have to ask the
cache administrators about querying policies to test that hypothesis.
--
Laurent
--
Amelia Bjornsdottir (she, they)
sysadmin umbrellix.net, deputy sysadmin chatspeed.net
jabber: eamon.aka.amy.malik ~on~ umbrellix.net
