North American Network Operators Group

Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Re[2]: SPAM from own customers

  • From: Richard Welty
  • Date: Tue Dec 02 14:58:29 2003

On Tue, 2 Dec 2003 14:32:16 -0500 Brian Bruns <[email protected]> wrote:
> SMTP AUTH is becoming risky if its not carefully setup and monitored.  I can
> name one big time spammer who has warmed up to cracking weak passwords on
> e-mail systems that do SMTP AUTH.  Means you'd have to filter your outbound
> mail servers port 25 from anyone not inside your network or a trusted
> source.

not just weak passwords, but there are also obvious default, admin,
and guest accounts on some SMTP servers which are sitting there,
easily guessed, and they are indeed being taken advantage of.

Richard Welty                                         [email protected]
Averill Park Networking                                         518-573-7592
    Java, PHP, PostgreSQL, Unix, Linux, IP Network Engineering, Security