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What is a DNSBL?
A DNS-based Blackhole List (DNSBL, Real-time Blackhole List or RBL), is a means by which an Internet site may publish a list of IP addresses, in a format which can be easily queried by computer programs on the Internet. As the name suggests, the technology is built on top of the Internet DNS or Domain Name System. DNSBLs are chiefly used to publish lists of addresses linked to spamming. Most mail transport agent (mail server) software can be configured to reject or flag messages which have been sent from a site listed on one or more such lists (Source)
We are regularly scanning new proxies that are reported to us and we're also trying to keep updated with the "Tor"-network proxies, a network that forgets that anonymousity can be a problem when we are speaking abuse.
|1||IP has been scanned|
Meaning: The ip has been reported from a third party but is unconfirmed by our local sweepers. As there may be SMTP-servers amongst our hosts, this bit value may be unsafe to use
|2||IP has been confirmed as working proxy|
|8||IP was tested, but was never returning anything|
Meaning: The ip may be fixed by the owner and therefore it's not working anymore
This is the former field for failed connections, which has been taken over by bit value 8
|32||IP is tested and is fully functional but there is a second entry point (meaning this ip is not the same as the one that has been used by the user"), or the address is an exit node in TOR-network|
|64||IP is marked as "abusive". Primary used to point out spam or attacks through webforms, forum, telnet, etc|
|128||IP has a different anonymous-state (web-based proxies, like anonymouse, etc)|
May be deprecated soon
|dnsbl.tornevall.org is the default zone (opm.tornevall.org removed 130630) to use on lookups. Future zones will also reported here.|
The project is located at Tornevall Networks Project-Tracker