could you fingerprint the source port?
-C
=-=-=-=-=-=-=-=-=-=-=-=-= | 0100111001101111011100110110010101111001
Christopher Regenye |
System Services | I know you believe you understand what you
PR Newswire | think I said, but I am not sure you realize that
christopher_regenye | what you heard is not what I meant.
@prnewswire.com |
=-=-=-=-=-=-=-=-=-=-=-=-= | 0111010000100000010110010110111101110101
|--------+---------------------------->
| | Clifford Thurber |
| | <cthurber@edisonsc|
| | hools.com> |
| | |
| | 04/10/02 10:56 AM |
| | |
|--------+---------------------------->
>------------------------------------------------------------------------------|
| |
| To: "Binaya D. Joshi" <[EMAIL PROTECTED]>, Chris Lee |
| <[EMAIL PROTECTED]> |
| cc: [EMAIL PROTECTED], (bcc: Christopher Regenye/PR Newswire)|
| Subject: Re: blocking telnet to port 25 |
>------------------------------------------------------------------------------|
You can't block telnet to port 25 you can either block port 25 or port 23
but thats it. SMTP is a mail protocol it does not care how the connection
to the IP/port pair was established as long as it follows the SMTP
protocol(i.e issues Helo, Mail From: Rcpt To: etc.)
At 04:14 PM 4/10/2002 +0545, Binaya D. Joshi wrote:
>blocking telnet to port 25 in mail server... huh ???
>
> if so; may be this be the last mail u r be receiving :)
>
>
>
>B.D.Joshi
>
>
>On Wed, 10 Apr 2002, Chris Lee wrote:
>
> > If you want mail to through, you can't.
> >
> > Chris
> >
> > Sayed Peerzade wrote:
> >
> > > Hello,
> > >
> > > I'm systems engineer in an ISP handling mail servers, i also handle
> > > checkpoint.
> > > pls tell me how to block telnet to port 25, keeping normal telnet to
> > > perform normally on mail server (netscape messaging server running on
> > > solaris OS))
> > > u can tell me method to block either in checkpoint or on mail server
> > > itself.
> > > Thanks and regards.
> > >
> > > Sayed K.Peerzade.
> > >
> > > _______________________________________________
> > > Firewalls mailing list
> > > [EMAIL PROTECTED]
> > > http://lists.gnac.net/mailman/listinfo/firewalls
> >
> > _______________________________________________
> > Firewalls mailing list
> > [EMAIL PROTECTED]
> > http://lists.gnac.net/mailman/listinfo/firewalls
> >
>
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