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Comment The arms race continues (Score 4, Insightful) 265

by dbosso (#48132263) Attached to: Ask Slashdot: Why Can't Google Block Spam In Gmail?

I've seen a lot of recent spam campaigns that get through my basic scanning using the following tactics:
1. Careful design to not trigger Spamassassin content rules, including blocks of text to fool the bayes filter.
2, Careful omission of any identifying headers except for completely valid SPF and DKIM headers with appropriately configured DNS.
3. Real Linux mail servers dropped onto virtual hosting providers.
4. Fresh IP addresses and domains - never used domains that are not blacklisted yet and IP addresses blocks from the hosting providers that take 10-30 minutes to get blacklisted
Then they use snowshoe spam tactics to trickle them out until they're blacklisted and then move to the next domain and address.

If your address is on the lists that the perpetrators of these campaigns are using, it's really hard to avoid spam right now. Not impossible, there are some countermeasures, but vanilla Spamassassin and your standard appliances are going to have problems. I can imagine google is going to have an easier time with this because of its size and volume (=more information), but it's far from trivial.

-db
Security

US and UK Zombies Demand Top Dollar 62

Posted by CmdrTaco from the prefer-domestic-spam dept.
coondoggie writes "Denizens of the malware underworld who sell access to compromised computers do so at varying rates depending on where the machines are located, researchers told the Usenix Security Symposium this week. The researchers followed what they called the pay-per-install (PPI) industry, which obtains infected machines from which malware can be launched and sells access to these machines to parties looking for someplace to execute malicious code. Sometimes the PPI sellers hire middlemen to supply the compromised machines, and the PPI dealer retails them."
Networking

The FCC Says ISPs Aren't Hitting Advertised Speeds 228

Posted by CmdrTaco from the stop-dropping-my-packets dept.
MojoKid writes "The Federal Communications Commission has released the results of a year-long scientific study it conducted with regard to the upload and download speeds of thirteen American Internet service providers. Most of the ISPs hit 90 percent of their advertised upload speeds. Of the 13 providers tested, only four (or less than a third) averaged at or even above their advertised download speeds (Charter, Comcast, Cox, and Verizon Fiber). The tests were performed by a private firm that has run similar tests in the U.K. It measured performance at 6,800 'representative homes' nationally in March."
Medicine

Why Some People Don't Have Fingerprints 159

Posted by Soulskill from the are-they-diabolical-masterminds dept.
sciencehabit writes "A small number of people in the world don't have fingerprints. The condition is known as adermatoglyphia, and one scientist has dubbed it the 'immigration delay disease' because sufferers have such a hard time entering foreign countries. In addition to smooth fingertips, they also produce less hand sweat than the average person. Now researchers have identified the genetic mutation behind the condition (abstract)."

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