nanog mailing list archives
Re: short Botnet list and Cashing in on DoS
From: "Stephen J. Wilcox" <steve () telecomplete co uk>
Date: Sat, 9 Oct 2004 20:00:10 +0100 (BST)
On Sat, 9 Oct 2004, Gadi Evron wrote:
Blocking port 25 for dynamic ranges means they can't send email, so that drone are pretty useless for spammers on that account. Trojan horses would have to use local information for the user's own account (from Outlook or such).
my users like being able to send email. i dont think this can work! (and there are many legit reasons for not using our own smtp servers.. indeed we have custs on other ISPs network who use our smtp server)
ISP's could then, I suppose, limit every user to 5 emails a minute (or any other number).
5 emails or 5 recipients? i can send one email with hundreds/thousands of rcpts.. and again, there are lots of legit reasons for sending a batch of emails
That combined with domain-keys and sender-ID could make for a much prettier Internet, don't you think?
you mean SPF? i agree, use as many tools as are available in conjunction with something like spamassassin to score mails as likely spam
Abuse using port 25 is a major issue today, why not solve it? If a user wants it open, they could always ask for it or even pay more money. Perhaps move to a static IP?
there are many ways of sending spam that dont use port 25.. individual rules are costly to implement and users wont use a service where you have to pay more for basic services Steve
Current thread:
- Re: [nanog] Re: short Botnet list and Cashing in on DoS, (continued)
- Re: [nanog] Re: short Botnet list and Cashing in on DoS Randy Bush (Oct 09)
- Re: [nanog] Re: short Botnet list and Cashing in on DoS Alexei Roudnev (Oct 10)
- Re: short Botnet list and Cashing in on DoS Mark Andrews (Oct 10)
- Re: short Botnet list and Cashing in on DoS James Baldwin (Oct 10)
- Re: short Botnet list and Cashing in on DoS Alexei Roudnev (Oct 10)
- BCP38 making it work, solving problems Sean Donelan (Oct 10)
- Re: BCP38 making it work, solving problems Edward B. Dreger (Oct 11)
- Re: short Botnet list and Cashing in on DoS Bill Stewart (Oct 11)
- Re: short Botnet list and Cashing in on DoS Edward B. Dreger (Oct 11)
- Re: short Botnet list and Cashing in on DoS David Lesher (Oct 09)
- Re: short Botnet list and Cashing in on DoS Stephen J. Wilcox (Oct 09)
- Re: short Botnet list and Cashing in on DoS Gadi Evron (Oct 09)
- Re: short Botnet list and Cashing in on DoS Stephen J. Wilcox (Oct 09)
- Re: short Botnet list and Cashing in on DoS Paul Vixie (Oct 09)
- Re: short Botnet list and Cashing in on DoS Alexei Roudnev (Oct 09)
- Re: short Botnet list and Cashing in on DoS Petri Helenius (Oct 09)
- Re: short Botnet list and Cashing in on DoS Michael . Dillon (Oct 11)