MailScanner & DoS

[Devon Harding]

How can I limit concurrent connections from specific IP's with MailScanner?

On 3/4/06, Devon Harding <devonharding at gmail.com> wrote:
>
> Yea, but I want this to be for every one, not just cable users
>
>
> On 3/3/06, Chris Stone <cstone at axint.net> wrote:
> >
> > Try using something like the NJABL_DYNBLOCK rbl to block such cable/dsl
> > users
> > from connecting......
> >
> > On Friday 03 March 2006 07:44 pm, Devon Harding wrote:
> > > For some reason, I can't seem to stop hackers from performaing DoS
> > against
> > > my IPCop fw & MailScanner server.  I get alot of these in my
> > > /var/log/maillog and the boxes get locked up:
> > >
> > > Mar  1 20:12:48 mars sendmail[27017]: k220vlXF027017:
> > > 69-165-202-64.miamfl.adelphia.net [ 69.165.202.64] did not issue
> > > MAIL/EXPN/VRFY/ETRN during connection to MTA
> > > Mar  1 20:12:48 mars sendmail[27019]: k220vmrk027019:
> > > 69-165-202-64.miamfl.adelphia.net [69.165.202.64] did not issue
> > > MAIL/EXPN/VRFY/ETRN during connection to MTA
> > > Mar  1 20:12:48 mars sendmail[27018]: k220vlM8027018:
> > > 69-165-202-64.miamfl.adelphia.net [69.165.202.64] did not issue
> > > MAIL/EXPN/VRFY/ETRN during connection to MTA
> > > Mar  1 20:12:49 mars sendmail[27020]: k220vm8s027020:
> > > 69-165-202-64.miamfl.adelphia.net [69.165.202.64] did not issue
> > > MAIL/EXPN/VRFY/ETRN during connection to MTA
> > > Mar  1 20:12:49 mars sendmail[27023]: k220vngJ027023:
> > > 69-165-202-64.miamfl.adelphia.net [69.165.202.64] did not issue
> > > MAIL/EXPN/VRFY/ETRN during connection to MTA
> > > Mar  1 20:12:49 mars sendmail[27021]: k220vmjG027021:
> > > 69-165-202-64.miamfl.adelphia.net [69.165.202.64] did not issue
> > > MAIL/EXPN/VRFY/ETRN during connection to MTA
> > >
> > > What can I do?
> > --
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> > mailscanner at lists.mailscanner.info
> > http://lists.mailscanner.info/mailman/listinfo/mailscanner
> >
> > Before posting, read http://wiki.mailscanner.info/posting
> >
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> >
>
>
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