pommi/docker-powerdns
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add DNSSEC support

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This commit is contained in:
Pim van den Berg 2022-06-21 14:41:27 +02:00
parent 699cd35877
commit f55687e58f
2 changed files with 44 additions and 0 deletions
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29
README.md
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@ -3,6 +3,7 @@
* Debian slim based image * Debian slim based image
* PowerDNS package from Debian * PowerDNS package from Debian
* Bind backend support only * Bind backend support only
* DNSSEC support (optional per zone)
# Usage # Usage
@ -53,3 +54,31 @@ services:
- '${PWD}/named.conf:/etc/powerdns/named.conf' - '${PWD}/named.conf:/etc/powerdns/named.conf'
- '${PWD}/zones/:/var/lib/powerdns/zones/' - '${PWD}/zones/:/var/lib/powerdns/zones/'
``` ```
# DNSSEC
Securing a zone:
```
$ docker exec -it powerdns pdnsutil secure-zone example.tld
[bindbackend] Done parsing domains, 0 rejected, 1 new, 0 removed
Securing zone with default key size
Adding CSK (257) with algorithm ecdsa256
Zone example.tld secured
Adding NSEC ordering information
```
Show DNSSEC related settings for the secured zone:
```
$ docker exec -it powerdns pdnsutil show-zone example.tld
[bindbackend] Done parsing domains, 0 rejected, 1 new, 0 removed
This is a Master zone
Last SOA serial number we notified: 0 != 2022010101 (serial in the database)
Metadata items: None
Zone has NSEC semantics
keys:
ID = 1 (CSK), flags = 257, tag = 280, algo = 13, bits = 256 Active Published ( ECDSAP256SHA256 )
CSK DNSKEY = example.tld. IN DNSKEY 257 3 13 5jAoLVZFaevgJkAKQzLJDdhQKP1i+SPaCrCjhsbsOAypYSsz9l7AyJC75trKdVwUn9ICMNq6Jjta9NQc7Bnktw== ; ( ECDSAP256SHA256 )
DS = example.tld. IN DS 280 13 1 0dead339b7dacebb6750c7d4e5c9c0f4c19843a9 ; ( SHA1 digest )
DS = example.tld. IN DS 280 13 2 f340e93c42b3c2c6fa8ef76e044ad2f064c1cd7484e785bdfca0f51cd548c88d ; ( SHA256 digest )
DS = example.tld. IN DS 280 13 4 a793c7e590a7701c7b39365f99655b865d11961c355a5eb59302282cf653aec8b051ddc9e36a9df0843cad29ca50149a ; ( SHA-384 digest )
```

15
start.sh
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@ -1,13 +1,28 @@
#!/bin/bash #!/bin/bash
# create sqlite database for DNSSEC
if test ! -e /var/lib/powerdns/bind-dnssec-db.sqlite3; then
echo [$0] Initializing /var/lib/powerdns/bind-dnssec-db.sqlite3
/usr/bin/pdnsutil create-bind-db /var/lib/powerdns/bind-dnssec-db.sqlite3
fi
sed -i 's/^# bind-dnssec-db=/bind-dnssec-db=\/var\/lib\/powerdns\/bind-dnssec-db.sqlite3/' /etc/powerdns/pdns.d/bind.conf
# start powerdns server
/usr/sbin/pdns_server --guardian=no --daemon=no --disable-syslog --log-timestamp=no --write-pid=no & /usr/sbin/pdns_server --guardian=no --daemon=no --disable-syslog --log-timestamp=no --write-pid=no &
# watch for zone changes
inotifywait -mqre modify --exclude '\.git' --format '%w%f' "/var/lib/powerdns/zones/" | inotifywait -mqre modify --exclude '\.git' --format '%w%f' "/var/lib/powerdns/zones/" |
while read -r path; do while read -r path; do
zone=$(basename $path) zone=$(basename $path)
echo [$0] A modification was detected in $path echo [$0] A modification was detected in $path
echo [$0] Executing \`/usr/bin/pdns_control bind-reload-now $zone\` echo [$0] Executing \`/usr/bin/pdns_control bind-reload-now $zone\`
/usr/bin/pdns_control bind-reload-now $zone /usr/bin/pdns_control bind-reload-now $zone
if pdnsutil show-zone $zone 2>/dev/null | grep -q "Zone is not actively secured"; then
echo [$0] Zone is not actively secured, skipping \`pdnsutil rectify-zone $zone\`
else
echo [$0] DNSSEC secured zone. Executing \`pdnsutil rectify-zone $zone\`
/usr/bin/pdnsutil rectify-zone $zone
fi
done & done &
wait -n wait -n