ref: 766dd843123e8cbea0f60e5b1b537541156b6622
dir: /ndb.ms/
Note the differences in how the addresses must be formatted: .P1 ; ndb/csquery > tcp!ircnow.org!443 /net/tcp/clone 198.251.82.194!443 ; ndb/dnsquery > ircnow.org ipv6 ircnow.org ipv6 2605:6404:2d3:: .P2 .PP Note: All addresses in plan 9 are IPv6 addresses. So an ipmask=/123 for an IPv4 address is actually an IPv4 /27 subnet. Note: when you lookup a name using whatever nameserver is defined in /lib/ndb/local, if it's not found, ndb will recursively search the root nameservers to find the entry Most resolvers will normally give up, but ndb is really persistent. .PP To run a caching DNS server, modify /cfg/$sysname/termrc or /cfg/$sysname/cpurc (whichever is appropriate) to include the following: .P1 ndb/dns -rLs .P2 .PP Be aware that you must include -L to prevent users outside the local network from being able to turn your caching server into an open relay for denial of service amplification attacks. -L provides a crude form of access control. Otherwise, you must firewall off access to prevent becoming an attack vector.