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dns.c | 7 years ago | |
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README.md
HUSH Seeder
hush-seeder is a crawler for the HUSH network, based on bitcoin-seeder, which exposes a list of reliable nodes via a built-in DNS server.
Features:
- regularly revisits known nodes to check their availability
- bans nodes after enough failures, or bad behaviour
- accepts nodes down to protocol version 170002
- 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).
REQUIREMENTS
sudo apt-get install build-essential libboost-all-dev libssl-dev
USAGE
- NOTE You cannot run this seeder on the same machine as a Hush full node, as both require port 18030.
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
;; ANSWER SECTION 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
Compiling will require boost and ssl. On debian systems, these are provided
by libboost-dev
and libssl-dev
respectively.
sudo apt-get install libboost-dev libssl-dev
git clone https://git.hush.is/hush/hush-seeder
cd hush-seeder
make
This will produce the dnsseed
binary.
RUNNING AS NON-ROOT
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.
LICENSE
GPLv3