On November 20, 2003 at 10:21, Dan Kegel wrote: > $ whois [EMAIL PROTECTED] > > says > > inetnum: 212.47.80.0 - 212.47.80.254 > netname: CONSTELLATION-ASDL-WAN > descr: ASDL WAN Addresses > descr: Alcom Internetix ASDL Access Range > country: GB > > I suppose somebody might be blacklisting all ADSL ranges > on the theory that they're likely home PCs which are easily > hacked...
Which may be bad policy. I think it is fairly common for small business and groups to actually have ADSL connections to the Net, but are operating under non-home user accounts. The same may apply to cable-based connections also. ADSL and cable are very economical for ISPs and small organizations to get connected to the Net. If ISPs have policies about not running servers on personal home systems and/or restricting mail traffic to only route through their mail server, they can enforce such policies via router configurations. Instead, some ISPs tend to block traffic that only serves their best financial interests (like blocking ipsec to force people to upgrade to more expensive services). However, such configuration would not stop worm-based spam. I.e. A worm designed to send spam could easily send mail through the ISP MTA by checking the systems outbound MTA setting. Of course, such worms would get the attention of ISPs since their servers will be at risk of being blacklisted, requiring them to be more proactive at contacting customers with infected systems. --ewh _______________________________________________ Gossip mailing list [EMAIL PROTECTED] http://www.mail-archive.com/cgi-bin/mailman/listinfo/gossip
