[brownbat]

It'd be nice if IPs involved in botnet DDoS's could go into a public registry, then get a banner from Google saying, "Hey, you might have a virus, someone reported you to this list."

Abuse would be tricky, you might be able to limit it by letting only a few DDoS mitigation providers populate the list.

[llasram]

This is actually one of the main uses for the ISP/telco product appliance sold by my employer, Damballa. The appliance reports client IPs which appear to be infected with malware to the ISP, who then reports this their affected customers by whatever mechanism the ISP prefers.

This particular DDoS I actually believe is _not_ due to a botnet, or at least believe there is insufficient evidence either way. The attack appears to be using a technique/infrastructure I’ve been passively tracking for nearly a year, wherein the attack DNS requests are spoofed to appear from seemingly-random clients and sent to open recursive DNS servers across the Internet. This makes the attack look like a botnet to superficial analysis on the target side, but this isn’t necessarily the case. In the small amount of time I’ve so-far invested in trying to track down the origin, I have yet to observe generation of the initial query packets.

[thaumaturgy]

> banner from Google saying, "Hey, you might have a virus, someone reported you to this list."

Unfortunately this is already in use with some malicious ads as well as phone scams to get people to give remote access to overseas tech centers that then scam them into paying good money for nothing.

To date the only tech line about this is, "nobody legitimate will ever contact you to tell you you're infected with a virus."

So I don't know how you could develop trust in that environment.

[Xylakant]

A lot of ISPs for example in Germany reuse IP addresses and force a reconnect every 24 hours. I don't think showing me banners because the previous "owner" of the IP had a virus is going to improve the situation.

Other people share a network behind a NATed IP which is also a problem. They'd all receive a banner, check their computer and a test would come up negative.

[cm2187]

Google wouldn't know but the ISP would know who was behind a particular IP at a specific time. They are the ones who should police their network when there are abuses.

[Xylakant]

The original proposal was that google delivers the ads. So google would have to contact my ISP who would then have to return whether or not I was using any of the given "spammy" IPs at the time that they were spammy - or my ISP would have to deliver the banner.

No thanks.