debian/djbdns-man/rbldns.8

   1 .TH rbldns 8
   2
   3 .SH NAME
   4 rbldns \- an IP-address-listing DNS server
   5
   6 .SH DESCRIPTION
   7 .B rbldns
   8 is an IP-address-listing DNS server.
   9 It accepts iterative DNS queries
  10 from hosts around the Internet asking about various IP addresses.
  11 It provides responses showing whether the addresses
  12 are on a locally configured list,
  13 such as RBL or DUL.
  14
  15 .SH Configuration
  16 Normally
  17 .B rbldns
  18 is set up by the
  19 .BR rbldns-conf (8)
  20 program.
  21
  22 .B rbldns
  23 runs chrooted in the directory
  24 specified by the
  25 .I $ROOT
  26 environment variable,
  27 under the uid and gid
  28 specified by the
  29 .I $UID
  30 and
  31 .I $GID
  32 environment variables.
  33
  34 .B rbldns
  35 listens for incoming UDP packets
  36 addressed to port 53 of
  37 .IR $IP .
  38 It does not listen for TCP queries.
  39
  40 .B rbldns
  41 handles domains of the form
  42 .IR d.c.b.a\fR.\fIbase
  43 where
  44 .I a.b.c.d
  45 is the IP address in question
  46 and
  47 .I base
  48 is given by the
  49 .I $BASE
  50 environment variable.
  51
  52 .B rbldns
  53 rejects
  54 inverse queries, non-Internet-class queries, truncated packets,
  55 packets that contain anything other than a single query,
  56 query types other than A, TXT, or *,
  57 and queries for domains outside
  58 .IR $BASE .
  59 It looks up other queries inside
  60 .IR data.cdb ,
  61 a binary file created by
  62 .BR rbldns-data (8).
  63
  64 .SH SEE ALSO
  65 rbldns-conf(8),
  66 rbldns-data(8)
  67
  68 http://cr.yp.to/djbdns.html