North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Time to check the rate limits on your mail servers
On Feb 3, 2005, at 9:30 AM, [email protected] wrote: IMHO, if you are a small ISP and limit the # of e-mails per user per day, even to something like 1K, you probably don't have to separate the MX & SMTP servers. But that's me, others might still think you were being "irresponsible".Easier said than done, especially if you're a small ISP that's been doingOne additional thing that I think wasnt mentioned in the article - Make sure your MXs (inbound servers) are separate from your outbound machines, and that the MX servers dont relay email for your dynamic IP netblock. Some other trojans do stuff like getting the ppp domain name / rDNS name of the assigned IP etc and then "nslookup -q=mx domain.com", then set itself up so that all its payloads get delivered out of the domain's MX servers Is there any info on how this zombie is spread? ie, email worms, direct All of the above. -- TTFN, patrick
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