On Wednesday, April 21, 2004, 3:13:44 AM, Simon Byrnand wrote:
Does the bitwise approach only allow use of the last octet of the ip address ? If so, that would limit you to a maximum of 8 merged "sources" of matches that could be distinguised. Probably not a problem in practice, but still a theoretical downside.
Other combined lists seem to used only 8 bits, i.e. 8 sources:
Using the DNSBL
In opm.blitzed.org, the A record has an IP address of 127.1.0.x where x is a bitmask of the types of proxy that have been reported to be running on the host. The values of the bitmask are as follows:
WinGate 1 SOCKS 2 HTTP CONNECT 4 Router 8 HTTP POST 16
In principle bits in the other octets could also be used, but in practice I don't see us having more than 8 sources. The question of how to do a combined list is still open however, so comments continue to be welcome.
Jeff C.