Don't greylist DSNs.

ban2zone.py

@@ -0,0 +1,16 @@
+#!/usr/bin/python2.4
+
+# Convert banned ip list to zonefile data suitable for use as a 
+# DNS blacklist with BIND.  This is a way to share your banned ips
+# with friends.
+
+import socket
+import sys
+from glob import glob
+
+banned_ips = [socket.inet_aton(ip) for fn in sys.argv[1:] for ip in open(fn)]
+banned_ips.sort()
+for ip in banned_ips:
+  a = socket.inet_ntoa(ip).split('.')
+  a.reverse()
+  print "%s\tIN A 127.0.0.2"%('.'.join(a))