SomeWhereOverTheRainBow
Part of the Furniture
It can support strict if you tell it no udp connections essentially, but dns resolution may occasionally fail. also query are not padded like you mention.
Unbound - Authoritative Recursive Caching DNS Server
- Thread starter rgnldo
- Start date
- Status
I made another adjustment to my dnsmasq.postconf to get the listening udp port on a loopback address for the running unbound process. I'm not a great scripter, and I think there could be a better check to ensure my variable isn't empty before proceeding, but posting for feedback anyway. This might make the whole setup more portable and dynamic for different configurations. Note that this only works right if you've made the dnsmasq restart a POSTCMD in S61unbound. If it's still a PRECMD, then unbound won't yet be running when this script runs.
Code:
#!/bin/sh
. /opt/share/diversion/file/post-conf.div # Added by Diversion
CONFIG=$1
. /usr/sbin/helper.sh
if [ -n "$(pidof unbound)" ]; then
UNBOUNDLISTENADDR=$(netstat -nlup | grep unbound$ | grep "^udp " | grep " 127\.0" | head -1 | awk ' { print $4 } ' | tr ':' '#')
if [ -n "$UNBOUNDLISTENADDR" ]; then
pc_delete "servers-file" "$CONFIG"
pc_delete "no-negcache" "$CONFIG"
pc_replace "cache-size=1500" "cache-size=0" "$CONFIG"
pc_append "server=$UNBOUNDLISTENADDR" "$CONFIG"
pc_append "proxy-dnssec" "$CONFIG"
fi
fi
Last edited:
rgnldo
Very Senior Member
Very good. Working correctly
Assuming you're talking about the built-in DNS Privacy with Stubby (and not Unbound's own DoT capability), it probably should be disabled to save resources on the router.
Probably the biggest adaptation still needed is to disable DNSSEC in the GUI so that dnsmasq is not doing its own DNSSEC, but only proxying whatever Unbound will return. The current dnsmasq.postconf posted doesn't yet address this possibility.
rgnldo
Very Senior Member
I changed the installation steps at the beginning of the post as suggested.
Code:
pc_delete "servers-file" "$CONFIG"Another point is to check if IPV6 is also listening to unbound.
rgnldo
Very Senior Member
@dave14305 dnsmasq.postconf only works with 'source' on reboot
Why this mode does not work
I am not using Diversion or Skynet to further study unbound behavior
Code:
CONFIG=$1
source /usr/sbin/helper.sh
Code:
CONFIG=$1
. /usr/sbin/helper.shI am not using Diversion or Skynet to further study unbound behavior
I haven’t rebooted yet, but the period has worked for the line above for Diversion without issue. Let me reboot. Be right back.
Edit: no issues for me on reboot. What happened when you rebooted? What logs or errors did you see?
Last edited:
rgnldo
Very Senior Member
In the logs does not mention anything. I think it's because I am not using Diversion. Your dnsmasq.postconf contains arguments for starting Diversion.
rgnldo
Very Senior Member
Unbound self TLS. Experimental. The options listed will prioritize TCP TLS traffic.
Take the tests
Key's:
unbound.conf:
Code:
incoming-num-tcp: 1000
udp-upstream-without-downstream: yesKey's:
Code:
mkdir /opt/var/lib/unbound/ssl
cd /opt/var/lib/unbound/ssl
openssl genrsa -out sslcert.key 2048
openssl req -key sslcert.key -new -x509 -days 720 -sha256 -extensions v3_ca -out sslcert.crt
-subj "/CN=Unbound CA"
chown -R nobody /opt/var/lib/unbound/sslunbound.conf:
Code:
# Server configuration
##
server:
port: 53535
verbosity: 1
# Interface IP(s) to bind to
interface-automatic: no
interface: 127.0.0.1
interface: 127.0.0.1@853
interface: 0::1
interface: 0::1@853
# TLS Configuration
tls-cert-bundle: "/etc/ssl/cert.pem"
tls-port: 853
tls-service-pem: "/opt/var/lib/unbound/ssl/sslcert.crt"
tls-service-key: "/opt/var/lib/unbound/ssl/sslcert.key"
# Self jail Unbound with user "unbound" to /var/lib/unbound
username: "nobody"
directory: "/opt/var/lib/unbound"
chroot: "/opt/var/lib/unbound"
root-hints: "/opt/var/lib/unbound/root.hints"
# The pid file
pidfile: "/opt/var/run/unbound.pid"
# Outgoing interfaces to be used
# DNS Rebinding
# For DNS Rebinding prevention
private-address: 10.0.0.0/8
private-address: ::ffff:a00:0/104
private-address: 172.16.0.0/12
private-address: ::ffff:ac10:0/108
private-address: 169.254.0.0/16
private-address: ::ffff:a9fe:0/112
private-address: 192.168.0.0/16
private-address: ::ffff:c0a8:0/112
private-address: fd00::/8
private-address: fe80::/10
# Set private domains in case authoritative name server returns a Private IP address
hide-identity: yes
hide-version: yes
harden-glue: yes
do-ip4: yes
do-ip6: yes
do-udp: yes
do-tcp: yes
do-daemonize: yes
module-config: "validator iterator"
unwanted-reply-threshold: 0
num-queries-per-thread: 512
jostle-timeout: 200
infra-host-ttl: 900
infra-cache-numhosts: 10000
outgoing-num-tcp: 1000
incoming-num-tcp: 1000
edns-buffer-size: 4096
cache-max-ttl: 86400
cache-min-ttl: 0
harden-dnssec-stripped: yes
msg-cache-size: 4m
rrset-cache-size: 8m
qname-minimisation: yes
udp-upstream-without-downstream: yes
num-threads: 1
msg-cache-slabs: 4
rrset-cache-slabs: 4
infra-cache-slabs: 4
key-cache-slabs: 4
outgoing-range: 4096
#so-rcvbuf: 4m
auto-trust-anchor-file: /opt/var/lib/unbound/root.key
prefetch: yes
prefetch-key: yes
use-caps-for-id: no
serve-expired: no
# Adblock blacklist
include: /jffs/Adblock/adservers.txt
remote-control:
control-enable: yes
control-interface: 127.0.0.1
control-port: 953
server-key-file: "/opt/var/lib/unbound/unbound_server.key"
server-cert-file: "/opt/var/lib/unbound/unbound_server.pem"
control-key-file: "/opt/var/lib/unbound/unbound_control.key"
control-cert-file: "/opt/var/lib/unbound/unbound_control.pem"To make this work we need to append server 127.0.0.1#853 in dnsmasq.postconf (no need for 127.0.0.1#53535 in dnmasq right? it works without appending 127.0.0.1#53535 in dnsmasq)
rgnldo
Very Senior Member
Works on 127.0.0.1#853!
Code:
# Server configuration
##
server:
port: 853
verbosity: 1
# Interface IP(s) to bind to
interface-automatic: no
interface: 127.0.0.1@853
interface: 0::1@853
# TLS Configuration
tls-cert-bundle: "/etc/ssl/cert.pem"
tls-port: 853
tls-service-pem: "/opt/var/lib/unbound/ssl/sslcert.crt"
tls-service-key: "/opt/var/lib/unbound/ssl/sslcert.key"I don’t understand what this is doing (or more precisely why you are doing it). You’ve reconfigured unbound to be a DoT listener on 127.0.0.1:853, but dnsmasq can’t send DoT requests so how can it be working as DoT?
There isn’t much need to encrypt traffic within the router’s loopback interface. Anyone who can sniff your loopback traffic is already in a position to have all your secrets.
There isn’t much need to encrypt traffic within the router’s loopback interface. Anyone who can sniff your loopback traffic is already in a position to have all your secrets.
rgnldo
Very Senior Member
Debating in the PFsense forum I elaborated this configuration. The logic is give TCP TLS receive preference. Delusion's suggestion was just a test tip. Ignore itI don’t understand what this is doing (or more precisely why you are doing it). You’ve reconfigured unbound to be a DoT listener on 127.0.0.1:853, but dnsmasq can’t send DoT requests so how can it be working as DoT?
There isn’t much need to encrypt traffic within the router’s loopback interface. Anyone who can sniff your loopback traffic is already in a position to have all your secrets.
Code:
# Server configuration
##
server:
port: 53535
verbosity: 1
# Interface IP(s) to bind to
interface-automatic: no
interface: 0.0.0.0
interface: 0.0.0.0@853
interface: ::0
interface: ::0@853
# TLS Configuration
tls-cert-bundle: "/etc/ssl/cert.pem"
tls-port: 853
tls-service-pem: "/opt/var/lib/unbound/ssl/sslcert.crt"
tls-service-key: "/opt/var/lib/unbound/ssl/sslcert.key"
incoming-num-tcp: 1000
udp-upstream-without-downstream: yesI'm broken after this. It wants to write the root.key to the read-only root filesystem.
Code:
Oct 7 16:11:05 unbound: [28213:0] fatal error: could not open autotrust file for writing, /root.key.28213-0-1f0f40: Permission denied
Oct 7 16:11:05 unbound: [28214:1] fatal error: could not open autotrust file for writing, /root.key.28214-1-1f0f40: Permission deniedEDIT: I needed to re-run unbound-anchor for the DNSSEC intialization.
EDIT2: I let opkg overwrite my S61unbound file and it was pointing to an invalid config /opt/etc/unbound/unbound.conf. Fixed
EDIT3: My /opt/var/lib/unbound directory reverted back to admin ownership instead of nobody, so I re-ran the "chown nobody /opt/var/lib/unbound" and things are working well again.
Last edited:
rgnldo
Very Senior Member
From what I observed, there were several changes in the shape of packages. I had a clean install of Entware.
Running smooth.
Yes, I had to force upgrade and now unbound is now unbound-daemon package.
I also lost the unbound-checkconf command. Time to update the install instructions in post #1.
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