Twister-seeder is a crawler for the Twister (github) network, which exposes a list of reliable nodes via a built-in DNS server.
Code based on Bitcoin-seeder.
Features:
- regularly revisits known nodes to check their availability
- bans nodes after enough failures, or bad behaviour
- accepts nodes down to v0.3.19 to request new IP addresses from, but only reports good post-v0.3.24 nodes.
- keeps statistics over (exponential) windows of 2 hours, 8 hours, 1 day and 1 week, to base decisions on.
- very low memory (a few tens of megabytes) and cpu requirements.
- crawlers run in parallel (by default 96 threads simultaneously).
sudo apt install build-essential libboost-all-dev libssl-dev
Using of it is highly appreciated. If you have a 24×7 machine and you are able to add an special NS record to your domain, please consider running twister-seeder. Then let @miguelfreitas know and he will add your domain to the code base.
Assuming you want to run a dns seed on dnsseed.example.com, you will need an authorative NS record in example.com's domain record, pointing to for example vps.example.com:
dig -t NS dnsseed.example.com
As answer you should get something like this:
dnsseed.example.com. 86400 IN NS vps.example.com.
On the system vps.example.com, you can now run dnsseed:
./dnsseed -h dnsseed.example.com -n vps.example.com
If you want the DNS server to report SOA records, please provide an e-mail address (with the @ part replaced by .) using -m.
Compiling will require boost and ssl. On debian systems, these are provided
by libboost-dev
and libssl-dev
respectively.
make
This will produce the dnsseed
binary.
Typically, you'll need root privileges to listen to port 53 (name service).
One solution is using an iptables rule (Linux only) to redirect it to a non-privileged port:
iptables -t nat -A PREROUTING -p udp --dport 53 -j REDIRECT --to-port 5353
If properly configured, this will allow you to run dnsseed in userspace, using the -p 5353 option.