The pasted image of the output shows some settings that are not present in the unbound configuration guide at Redirecting...
From "so-reuseport" down through "so-recbuf" are different or do not appear in the pi-hole setup guide. Why have you used these settings?
Your full configuration is shown in your screen snap.
I see that your settings for so_reuseport, msg-cache-size and rrset-cache-size are the defaults.
Your num-tcp settings are significantly higher than the defaults.
This is a screen shot of the settings recommended by the Pi-Hole guide. These do not match your settings in some respects, as noted above.
Ok, then I will return the TCP amount later, or delete it, but I don't think it has anything to do with this! hope so!
We are a Pi-Hole forum and can only offer limited advice on unbound, since the developers don't write that code. I recommend going into the unbound forums to find out what causes SERVFAILs.
I am a little busy late to reply to your test results! Thank you for your guidance!
Can the unbound forum address be given to me?
thk you !!!
The unbound forum has no feedback, only the mail can communicate.
Ok, I am trying to upgrade unbound.
root@rockpi:/opt# unbound -h
usage: unbound [options]
start unbound daemon DNS resolver.
-h this help
-c file config file to read instead of /etc/unbound/unbound.conf
file format is described in unbound.conf(5).
-d do not fork into the background.
-v verbose (more times to increase verbosity)
Version 1.6.7
linked libs: libevent 2.1.8-stable (it uses epoll), OpenSSL 1.1.0g 2 Nov 2017
linked modules: dns64 python subnetcache respip validator iterator
BSD licensed, see LICENSE in source package for details.
Report bugs to unbound-bugs@nlnetlabs.n
I did not install dnscryptproxy, just a pi hole and unbound
root@rockpi:~# uname -sm
Linux aarch64
How to update the version of this system
I am testing if I have dnscryptproxy installed.
I am testing if I have dnscryptproxy installed.