The twister P2P Book

#/etc/systemd/resolved.conf
DNSStubListener=no

Firewall

Change the iptables rules to make twister-seeder DNS accessible from outside:

sudo ufw allow 53

Launch

Login as root then run:

./dnsseed -h seed.domain.org -n ns.domain.org

Output example:

0/2 available (2 tried in 333s, 0 new, 0 active), 0 banned; 31 DNS requests, 13 db queries
...

Test

Before continue with systemd,
run on the local/remote host following command when twister-seed (dnsseed) is running:

host -a seed.domain.org ns.domain.org

the output appear as follows:

Trying "seed.domain.org"
Using domain server:
Name: ns.domain.org
Address: IP#53
Aliases:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18126
;; flags: qr aa rd; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;seed.domain.org.		IN	ANY

;; ANSWER SECTION:
seed.domain.org.	40000	IN	NS	ns.domain.org.
seed.domain.org.	60	IN	A	TWISTER_CORE_IP_1
seed.domain.org.	60	IN	A	TWISTER_CORE_IP_2

Received 99 bytes from IP#53 in 0 ms

• if everything is working, TWISTER_CORE_IP_1 and TWISTER_CORE_IP_2 should display the real peers who are running their twister-core nodes on port 28333
• if you have any issues with discovering new peers, see Troubleshooting or open new Issue

systemd

# /etc/systemd/system/twister-seeder.service
[Unit]
After=network.target

[Service]
Type=simple
ExecStart=/path-to/twister-seeder/dnsseed -h seed.domain.org -n ns1.domain.org
# please note:
# twister-seeder may generate massive output if the StandardOutput is set to a log file!
StandardOutput=null
StandardError=file:/path-to/twister-seeder-errors.log
Restart=on-failure

[Install]
WantedBy=multi-user.target

• systemctl daemon-reload - apply systemd update
• systemctl enable twister-seeder - launch twister-seeder on system startup
• systemctl start twister-seeder - start DNS