Date: Mon, 30 Dec 2002 08:00:52 -0600 From: Peter Elsner <peter@servplex.com> To: htabak@quadtelecom.com Cc: freebsd-security@freebsd.org Subject: Re: Bystander shot by a spam filter. Message-ID: <5.2.0.9.0.20021230075825.01ca0d10@mail.servplex.com> In-Reply-To: <3E0DAAF3.7090103@quadtelecom.com>
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Your comment: Until it is fixed, and proven harmless, FreeBSD should stop distributing this product. Is silly. The port is not installed by default, it has to be installed. So the only thing that needs to happen is that the port maintainer put a notice on the port stating the possible problems that might occur. If the ISP uses it, then you need to complain to the ISP. Don't think that FreeBSD has to stop carrying the port because of some stupid ISP who doesn't know what the hell they are doing anyway. At 08:45 AM 12/28/2002 -0500, you wrote: >[This is a resend. Ironically, the orignal was blocked by FreeBSD's spam >filter, I've had to send this from another account] > > I am not sure which list is best for this issue, hence the cross >posting. I believe spam and anti-spam measures are security issues -- >the 'Availability' part of C-I-A. I apologize if I am wrong. A FreeBSD >ported package is contributing to an internet service availability >problem that has me stumped. I believe that an unknowable quantity of >other internet denizens are also affected. > > I'm a long time fan of FreeBSD -- I run it on my small mail > server and >I've recommended it for many applications. I even bought a CD once. I >write this missive with great reluctance. I've worked with a lot of >strange software over the years, But this is a new first -- Software >that slanders! Software that publicly called me a spammer!!! And not to >my face, but to business associate. And then took action. > > I recently discovered, and quite by accident, that a FreeBSD ported >package -- spambnc (aka Spambouncer or SB) -- was blocking mail from me >to an unknown number of businesses and individuals on the internet. I'll >probably never have to correspond with most of these people, but I'm a >freelancer -- this may have already cost me a job. [Dear reader, don't >be surprised if you or your clients are also blocked. I strongly suggest >that you check it out.] > > Anti-spam products have a valuable place in the security > arsenal. But, >IMHO, this product is dangerous because it includes filters and rules >that are overreaching, and inaccurate. Bad firewall rules and bad >anti-spam rules may be OK for an individual site. However, spambnc's >bad advice is being mass marketed through the good offices of FreeBSD, >and it is putting potholes in the net for the rest of us. Until it is >fixed, and proven harmless, FreeBSD should stop distributing this product. > > Basically, the default built-in policies for blocking mail aren't > fully >described, and there is no mechanism to universally correct the >inevitable mistakes in a timely manner. Users (people who install this >product) are mislead about the probably of filtering the wrong mail. I >am sure that the software was developed with the very best intentions, >but in its zeal to block lots and lots of spam, SB is hurting good people. > > The SB rule blocking my mail host has nothing to do with me. Even >though, it can use dynamic anti-spam DNS services, SB hard codes its >rules for filtering bad domains by name and by IP address. My nemisis is >buried in a 1476 line file, sb-blockdomains.rc, which installs by >default, and is not documented outside the code. Along with others, it >blocks the entire 66.45.0.0/17 space because spammers might live there. >This is sort of like a corporate mail room throwing away all NJ >postmarked mail because of the bulk mail distribution centers in Secaucus. > > My mail host address gets a clean bill of health from every anti-spam >site that I can find, such as SPEWS. I've checked at least 30 of them. > > My tiny x/29 block is sub-allocated from my DSL provider's x/23 > block. > The DSL provider's block is a sub-allocation from Inflow.com's >66.45.0.0/17 block. Spambouncer doesn't like Inflow. While they have a >right to their opinions, they don't have a right to publicly tar me >because of my neighbors. > > If I read sb-blockdomains # comments correctly, it is policy to not >only block known spammers, but to ALSO block entire networks based on >their handling of spam complaints. This is like as a business >receptionist checking callerID and then ignoring incoming calls from >Verizon subscribers because Verizon tolerates (and probably invented) >telemarketing. > > I have written to both the Spambouncer contact address ><ariel@spambouncer.org> and the FreeBSD maintainer, but without a >response. Possibly they are on holiday, or spambouncer is eating my >mail. Perhaps I'm just too impatient. > > I have also contacted my ISP's support. They don't know how to help >me. They vouch for Inflow. They don't recommend it, but for a fee, my >service could be switched to a different PVC, and I'd get an address >from a different carrier. But of course, the new address could be >black-listed on a whim. > > Regardless, I assume that these are reasonable people, and that they >will oil the squeaky wheel as soon as it is convenient. But how will I >ever know that EVERY copy of spambouncer has been fixed? What about >other innocent ISP subscribers who are also black-listed? > >Harry Tabak >QUAD TELECOM, INC. > > > > > > > > >To Unsubscribe: send mail to majordomo@FreeBSD.org >with "unsubscribe freebsd-security" in the body of the message ---------------------------------------------------------------------------------------------------------- Peter Elsner <peter@servplex.com> Vice President Of Customer Service (And System Administrator) 1835 S. Carrier Parkway Grand Prairie, Texas 75051 (972) 263-2080 - Voice (972) 263-2082 - Fax (972) 489-4838 - Cell Phone (425) 988-8061 - eFax I worry about my child and the Internet all the time, even though she's too young to have logged on yet. Here's what I worry about. I worry that 10 or 15 years from now, she will come to me and say "Daddy, where were you when they took freedom of the press away from the Internet?" -- Mike Godwin Unix IS user friendly... It's just selective about who its friends are. System Administration - It's a dirty job, but somebody said I had to do it. If you receive something that says 'Send this to everyone you know, pretend you don't know me. Standard $500/message proofreading fee applies for UCE. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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