[Dnsmasq-discuss] Flags on cache dump

David Moyes dnsmasq at jelmail.com
Wed Aug 25 09:02:27 UTC 2021

Is there any documentation, besides the code, that explains the flags on
a USR1 cache dump?

I couldn't find this info on the man page or website so I looked in the
code and arrived at this conclusion: there are 9 fields displayed as a
value or a blank in string like "tFRIDNXHV" where these mean:

* type = 4=IPv4 | 6=IPv6 | C=CNAME | V=SRV | S=DS | K=DNSKEY
* F=forward
* R=reverse
* I=immortal
* D=dhcp
* N=negative
* X=nxdomain
* H=hosts
* V=dnssec ok

Is there any further explanation of what these actually mean? Most are
obvious I guess but some (esp immortal and negative) less so.


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