Some people have suggested maintaining black lists and white lists to avoid spammers and allow legitimate callers into the network. However, the problem with this method is that the spammer's IP address might change due to DHCP. Today a spammer might get aaa.bbb.ccc.ddd and lets say that I put this address in my blacklist. To my annoyance, tomorrow a legitimate caller might get aaa.bbb.ccc.ddd and the spammer might get a different IP address. In the end, I end up blocking the legitimate caller also. Any ideas or thoughts to on this problem is appreciated.
A couple of discussion about this have come up, and something occurred to me about the FCC decision about free world dialup not being classified as a phone service. This opens the flood gates to telemarketers to FWD users as they don't have to honour any form of do not call list the FCC issues, which then of course leads on to other systems like IAXTEL with all voice data over the internet rather then pstn network...
Also a possibly solution may have come out of the same discussions, technically if everyone enforces some kind of enum lookup before accepting calls, and the same enum lookup will return NAPTR records, so a slight modification to loop through all DNS records could then be checked against the current hostname/IP in a similar fashion to SPF records and mail servers...
End result is a nice neat little database of blacklisted phone numbers rather then IPs, you'd need some resolution service/time-out period to remove the black listing, but mmmm lot harder to get new phone numbers then new IPs...
PS We've come up with a patch to the enum lookup to return a Caller Name from a TXT record, appreciate any feedback, our c skills are a little rusty so it's possibly not the most elegant solution...
http://bugs.digium.com/bug_view_page.php?bug_id=0001442
-- Best regards, Duane
http://www.cacert.org - Free Security Certificates http://www.nodedb.com - Think globally, network locally http://www.sydneywireless.com - Telecommunications Freedom http://happysnapper.com.au - Sell your photos over the net! http://e164.org - Using Enum.164 to interconnect asterisk servers _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
