4 NovaCoin-seeder is a crawler for the NovaCoin network, which exposes a list
5 of reliable nodes via a built-in DNS server.
8 * regularly revisits known nodes to check their availability
9 * bans nodes after enough failures, or bad behaviour
10 * keeps statistics over (exponential) windows of 2 hours, 8 hours,
11 1 day and 1 week, to base decisions on.
12 * very low memory (a few tens of megabytes) and cpu requirements.
13 * crawlers run in parallel (by default 24 threads simultaneously).
18 Assuming you want to run a dns seed on dnsseed.example.com, you will
19 need an authorative NS record in example.com's domain record, pointing
20 to for example vps.example.com:
22 $ dig -t NS dnsseed.example.com
25 dnsseed.example.com. 86400 IN NS vps.example.com.
27 On the system vps.example.com, you can now run dnsseed:
29 ./dnsseed -h dnsseed.example.com -n vps.example.com
31 If you want the DNS server to report SOA records, please provide an
32 e-mailadres (with the @ part replaced by .) using -m.
37 Typically, you'll need root privileges to listen to port 53 (name service).
39 One solution is using an iptables rule (Linux only) to redirect it to
40 a non-privileged port:
42 $ iptables -t nat -A PREROUTING -p udp --dport 53 -j REDIRECT --to-port 5353
44 If properly configured, this will allow you to run dnsseed in userspace, using